Heat pumps · 119 sources checked

A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses

Probably right

UK quasi-experiment on 1,321 Octopus Energy heat pump adopters: gas use fell 9,351 kWh/yr while electricity rose 3,080 kWh/yr, so the heat pump replaced gas using only about 30% of the energy, in line with roughly 300% efficiency.

· denied 0 ·

Asserts (35)Denies (0)Verdicts (8)

Dual Fuel HVAC | This Old House (This Old House)“what it's trying to do is to find heat even in the cold air outside”
What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“It moves heat. It doesn't make heat the way a gas furnace does.”
Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“Heat pumps move heat rather than create it.”
Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“air conditioners actually move three to four times as much energy than they consume.”
Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“because it's moving heat rather than creating it, it is way more efficient”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“It's taking heat from the outside and moving it in.”
Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“it’s not creating heat energy it’s only moving it”
Heat Pumps: the Future of Home Heating (Technology Connections)“this heat pump is able to move up to five and a half times as much heat energy as it actually consumes in electricity.”
The Trouble With Heat Pumps (Sabine Hossenfelder)“They typically have half to a third of the energy needs of a typical fossil fuel heating.”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“spend 3 kW of power running the pump and get 9 or even 12 kW of heat energy out of it”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“Because you're moving heat rather than creating it, one unit of electricity in can deliver three or more units of heat out”
How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“You're essentially using one watt of electricity to move three to five watts of heat.”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“we can end up with 3 or sometimes even 4 times as much energy inside our homes than we spend to collect it”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“for every unit of electricity that we've used we've got three and a half units of heat out”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“The system is just moving preexisting heat around”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“it doesn't use the energy you put in to generate heat. Instead, it simply moves heat from one place to another.”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“heat pumps can be more than 100% efficient. They can deliver more thermal energy than the electrical energy they consume.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“they have coefficients of performance that are greater than 1.”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“it will produce three to five units of heat for the home”
Heat Pump Economics in Massachusetts (Abode Energy Management)“they use electricity to pump heat from one location to the other”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“a heat pump is a way for us to use less electricity and get more heat”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“for every one unit of energy that you put into the system you'll achieve four units of heat”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“heat pumps use electricity to gather extra heat from the outside air or ground, meaning they typically generate at least 2 units of heat”
Why aren't we all using heat pumps? (Simon Clark)“they move heat rather than generate it”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“A heat pump doesn't create heat, it moves heat.”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“it's not creating heat, it's just moving heat around and that makes it super super efficient”
A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“these heating and cooling machines are anywhere between 2-4x more efficient than traditional furnaces and boilers.”
Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“We put in one unit of electricity and we get four units of heat out, so they're 400% efficient.”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“we have an efficiency of 3.8 or as I prefer to do it. Come on 380% efficiency.”
Heat Pumps | Mass Save (Mass Save)“Today’s cold climate heat pumps are 2-3x as efficient as a boiler or furnace”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Because it moves heat, it can deliver two to four units of heat energy per unit of electricity.”
I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“That gives us a seasonal coefficient of 3.54, which is pretty good for the cold part of the winter.”
What's the true cost of a heat pump? (Grist)“it doesn't actually make heat -- it moves it.”
Which home energy upgrades will save you money? We did the math. (Washington Post)“just 1 kWh of electricity can pull 3 or 4 kWh of heat indoors”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“even at minus 30, there's a lot of thermal energy to be absorbed”
Almost certainly right AI guessAir-source heat pumps routinely deliver two to four units of heat per unit of electricity, as rated and field-measured COPs show.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 183-192UK quasi-experiment on 1,321 Octopus Energy heat pump adopters: gas use fell 9,351 kWh/yr while electricity rose 3,080 kWh/yr, so the heat pump replaced gas using only about 30% of the energy, in line with roughly 300% efficiency.
Probably right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 53-55The paper explains that ASHPs transfer rather than generate heat and so output more heat energy than the electricity they use; its measured annual COPs (1.9 all-electric, heat-pump-only COPs up to about 3.5) confirm output above input.
Probably right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 2926-2935Metered mini-splits in Massachusetts and Rhode Island averaged a COP of about 1.5 even at -10 to 0 F, so they delivered more heat than the electricity they used even in the coldest bins (rated COPs are higher).
Probably right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 180-189In 22 field homes, prototype cold-climate heat pumps had median heat-pump-only COPs of 1.6-2.7 below 30 F and 1.9 at 0-5 F, so they delivered roughly two units of heat per unit of electricity even in deep cold.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 104-108Electricity does the work of moving heat rather than producing it, so delivered heat per unit of electricity is typically much greater than one.
Leans right RMI 2018, the economics of electrifying buildings lines 353-355RMI states that because heat pumps move heat rather than generate it they are more efficient than electric furnaces and baseboard heat; its modelled heat pumps run at COPs above 1.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 369-373Heat pumps move heat rather than generating it and deliver 2 to 5 kWh of heat per kWh of electricity (citing NRCan and others).

Heat pump efficiency and capacity fall as the outdoor temperature drops

Probably right

Measured heat-pump-only cycles averaged COP about 1.3 at the 10F change point rising to 3.0-4.5 at 50-60F; outdoor temperature had the largest effect on COP across six Minnesota sites.

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Asserts (34)Denies (1)Verdicts (10)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“the performance challenges heat pumps currently encounter at very cold temperatures”
Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“But along with getting less efficient, their actual heat output also drops.”
Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“When the ambient temperature drops to -10ºC (about 14ºF) or lower, the heat pump's electric power consumption rate increases”
Heat Pumps: the Future of Home Heating (Technology Connections)“as it gets colder outside, their effectiveness is reduced.”
Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“most high efficiency heat pumps are efficient down to as low as 0 to 10 degrees Fahrenheit”
Why Heat Pumps are now leaving people COLD (Silver Cymbal)“they can still generate heat but they become much less efficient now efficiency just means that your electric bill is going to get higher”
How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“But an air source heat pump at those same frigid, 20 below, air temperatures would lose”
$21k VS $7k Air Conditioner Heat Pump | Scam Or Real | HVAC Review (HVAC Talkshow and Review For Homeowners & DIY)“this 3-tonon system essentially becomes a one- ton system at 5° F.”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“they don’t work as well in cold weather when you need them most.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“but they won’t attain their full output and will have a poor COP at that temp”
Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“as they get to that minus 30 they're essentially working they lose their efficiency”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“in freezing temperatures the heat pump is going to struggle some”
Heat Pump Economics in Massachusetts (Abode Energy Management)“as the temperature drops down to 17 degrees we'll see the coefficient of performance has dropped down to 2.64”
Mini-Split 2 Year Review | COLD CLIMATE (Jacob Shields)“if it's too cold outside it just it just can't do that”
I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“extreme hot and cold outside temperatures will affect the mini split's efficiency.”
Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“The colder (or hotter) it is, the harder it has to work to make that happen, and the more electricity it takes.”
Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association (American Gas Association)“Ducted heat pumps do work in cold climates, but below-freezing winter temperatures can lead to lower performance”
Heat Pump SHUT OFF Temp with AUX HEAT! (HVAC Guide for Homeowners)“if it gets so cold outside that the heat pump is basically rendered useless”
Do Heat Pumps Really Work in Cold Climates? (Bosch Home Comfort)“the colder it is outside, the more difficult it is to extract heat from the outside air”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“because heat pumps are less efficient at low temperatures”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“All air-source heat pumps struggle to perform as temperatures drop; the space they can effectively heat shrinks, and they don’t work as efficiently.”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“in practicality it actually works down to about 9 degrees colder than that and it'll shut itself down”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“The colder it gets, the less heat there is to pull out of the air, and the less efficient it becomes.”
Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“it will take more input energy for a heat pump to heat your home if it's extremely cold outside”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“On older heat pumps, the output starts falling off the cliff around that temperature.”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“In a very cold climate a standard unit spends hours near COP 1.5 to 2.0 and may fall back to resistance strips”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“anything below 40° will cause the heat pump's efficiency to slip”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“anything below 40 degrees will cause the heat pump's efficiency to slip and it will need to consume more power”
Cold Climate Heat Pumps: Everything You Need to Know - Trane® (Trane Residential)“many systems will start to lose delivered heating capacity as it gets colder outside”
I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“the efficiency of your heat pump depends on the external temperature.”
Why is my electric Bill so High!!! Mitsubishi Mini Split Hyper Heat Review Part 4. Feb 2020 Bill (J-Mart)“this is the time of the year where these are at their most efficient”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“only a coefficient of performance of 2.69. That is one of the very worst days”
Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“they vary their efficiency with the outside air temperature”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“of course it will perform better if it's 50 degrees outside compared to zero degrees outside”
DENIES How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“there doesn't seem to be any correlation of coefficient of performance and outside temperature”
Almost certainly right AI guessAir-source heat pump COP and maximum output both decline as outdoor temperature falls, as manufacturer and NEEP data show.
Probably right CEE 2017, cold-climate heat pumps in Minnesota lines 1143-1157Measured heat-pump-only cycles averaged COP about 1.3 at the 10F change point rising to 3.0-4.5 at 50-60F; outdoor temperature had the largest effect on COP across six Minnesota sites.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1097-1100Capacity retention curves from lab and NEEP manufacturer data fall from 100% of rated output at 47F to 47% (single-speed) or 85% (cold-climate) at 5F.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 300-305Heat pump efficiency falls with ambient temperature, and at low temperatures the load can exceed capacity so the model falls back to resistance heat (COP 1).
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3120-3127The evaluation states unit efficiency drops as outdoor temperature drops and estimates from manufacturer data that capacity falls about 20% from 17 F to 5 F at fixed airflow; about half the units could not meet the space heating load below 17 F.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1000-1003Heating COPs rose steadily with outdoor temperature (median 1.6 in the cold bins up to about 5.2), and the report notes conventional heat pumps lose capacity below 40 F and keep only a fraction in the teens.
Leans right RMI 2018, the economics of electrifying buildings lines 966-970The cold-climate Mitsubishi unit RMI models has a COP at max capacity that falls from 3.5 at 47F to 2.1 at 17F and 1.4 at -13F; the report shows efficiency falling but gives no capacity figures.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 478-489A 1-ton ductless unit in northern Minnesota held its median capacity from 10F to -15F but delivered only about 2,600 Btu/h (about 20% of its rated 5F capacity) between -20F and -25F.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1638-1659Edwards fits heat pump COP from the NEEP database as a linear function of outdoor temperature (COP = 0.05T + 1.6 above 5F), with single-stage units dropping to about COP 1 below 5F; the source covers efficiency only, not capacity.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 376-378Older heat pumps lose efficiency in colder temperatures, less so for newer models; the passage says nothing about capacity.

Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices

Leans right

LBNL retrofit database (1,739 projects): about 70 electrification projects in states with high electricity costs raised household energy costs, and the authors conclude savings must be judged state by state given the variation in gas and electricity prices.

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Asserts (31)Denies (0)Verdicts (8)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“Locally we need a consistent COP of 4 just to break even with the cost of gas”
What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“at gas where it may be cheaper maybe not so much”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“the uncomfortable truth is that actually both can be right.”
Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“you have to look at the cost of natural gas in your area versus the cost of electricity”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“you need to equate your cost per kilowatt hour of your heating fuel and then compare that to your cost of electricity”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“I’m not going to go into operating cost comparisons here as that’s a very local consideration”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“costs I cannot give a blanket statement yet”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“at a price cap tariff our heat pump would have had a similar cost to run as a very efficient gas boiler”
Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“Or it may be in an area where gas is just really cheap and it also makes sense.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“the cost of electricity in your area compared to that of natural gas makes cost comparisons a hyper-local exercise”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“in total there was 18 states where gas is cheaper and 33 states for electricity and the heat pump is cheaper”
Heat Pump Economics in Massachusetts (Abode Energy Management)“fuel prices do change and it wouldn't take much to make that heat pump the most cost-effective solution”
Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“But today, gas is cheap again. It was expensive. Now it's cheap, and that has changed the numbers.”
Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“natural gas prices and electricity prices vary widely across the country”
Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“where you live says a lot about what type of heating is going to be most affordable in the long term.”
Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“this also changes from year to year with natural gas prices”
New winter rates saved at least $37M for Massachusetts heat-pump… (Canary Media)“That number jumps to 64% with the existing heat pump discount and could go up to almost 82% if the deeper proposed cuts are implemented.”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“The running costs of heat pumps relative to gas boilers depend on energy prices and the efficiency of the heat pump installation.”
Does a Heat Pump Actually Save Money? (EnergySage)“The math all depends on individual circumstances: Your home, your climate, your local energy prices and policies”
The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“with rates, efficiencies, and equipment costs all over the map, you can’t make any generalization about always using heat pumps or always using gas heat.”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“But from a heat pump running about 300% efficiency, about a dollar 11. Actually slightly cheaper than gas at current rates.”
How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“with electricity being relatively cheap here and natural gas expensive, that makes it the most cost-effective heating option here”
Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“that "being cheaper" part is entirely dependent on your relative costs for different input energy types”
A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“Because of current prices, switching to a heat pump from natural gas doesn’t save much on average.”
Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“Trouble is, electric's four times the price of gas, so it's all meeting the middle.”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“It depends on the ratio of your electricity price to your gas price.”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“your choice between them depends on your local gas and electricity rates”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Operating cost depends on local electricity and gas prices, climate, equipment efficiency, and thermostat settings.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“For gas-heated homes, the bill savings vary by heat pump design and utility territory.”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“what you're actually comparing is the cost of natural gas which historically has been very low”
Which home energy upgrades will save you money? We did the math. (Washington Post)““It’s a relationship between the outdoor temperature, your rates and the efficiency of the heat pump,””
Very likely right AI guessRunning cost versus gas is set by the electricity-to-gas price ratio divided by the seasonal COP, so local prices dominate the comparison.
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 855-857Edwards finds large regional differences in heat pump operating costs that depend on local climate as well as the price of electricity relative to gas, so prices are a main driver but not the only one.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 164-171LBNL retrofit database (1,739 projects): about 70 electrification projects in states with high electricity costs raised household energy costs, and the authors conclude savings must be judged state by state given the variation in gas and electricity prices.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 538-553Bill savings are very sensitive to prices (2019 elec-to-gas ratio 4.1 cuts gas homes with positive savings from 32-92% to 22-83%), but the range itself shows equipment efficiency matters as much as prices, so 'mainly prices' overstates.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1060-1067Advocacy-adjacent Canadian lifetime-cost model (five cities): regional energy prices and climate are the biggest drivers of whether heat pumps beat gas, with prices and climate both mattering (e.g. low-gas-price, cold Edmonton vs Montreal and Halifax).
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 955-966The report maps electricity and fuel prices against the outdoor temperature above which a mini-split is cheaper than fuel heat; the answer turns on the price pair and on the unit's efficiency at that temperature, and at 2015-16 New England prices gas won almost everywhere.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1038-1044In the UK, total energy use fell 40% after switching from a gas boiler, yet running costs came out slightly higher because electricity costs more per kWh than gas, which shows prices decide the comparison (one country, one set of prices).
Leans partly right EIA, state residential electricity and gas prices lines 119-125EIA-derived break-even seasonal COP equals the electricity-to-gas price ratio times furnace AFUE, so the outcome depends on local prices and on the heat pump's seasonal efficiency together.

Modern cold-climate heat pumps keep heating well below 0°F

Leans right

A ductless cold-climate unit delivered a consistent median capacity from 10F to -15F and kept operating to -25F at reduced capacity, though the authors say it needs backup below -15F; one monitored unit.

· denied 0 ·

Asserts (31)Denies (0)Verdicts (7)

Dual Fuel HVAC | This Old House (This Old House)“And what will this heat down to? Al: Negative 22.”
MYTHS about Heat Pumps! (HVAC Guide for Homeowners)“if it got below 40 degrees outside heat pumps started to struggle to provide heat but those days are over”
What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“equipment that can deliver full rated capacity down to 5° Fahrenheit and still produce heat at -13.”
Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“they have actually taken heat pumps in Alaska and they don't have backup heat”
Heat Pumps: the Future of Home Heating (Technology Connections)“some heat pumps like this are rated down to 20 below zero!”
Why Heat Pumps are now leaving people COLD (Silver Cymbal)“many of them now include a function called hyper heat that can allow a heat pump to effectively operate down to -20°”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“Heat pumps that work effectively below -10°F are just around the corner”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“their heat pump could produce all the heat they needed”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“So, the cold isn't really a problem anymore outside of the most extreme circumstances.”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“modern heat pumps work in temperatures down to -26°C”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“Many units now guarantee operation down to -13°F which is -25°C”
Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“there's some now that work down to minus 30”
Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“And so far, the coldest night I've experienced is -8° Fahrenheit.”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“it got down to -12 Fahrenheit orus 245 celsi before my mom and dad's 3 ton cold climate heat pump required backup heat”
Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“they are rated to perform down to negative 10 Fahrenheit”
Do Heat Pumps Really Work in Cold Climates? (Bosch Home Comfort)“The unit will continue to initiate heating even down to the bone-chilling temperature of -13°F”
Contractor (Contractor Magazine)“without the need for any back-up heating and do so at outdoor temperatures well below 0°F”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“There are lots of heat pumps that maintain 100% capacity all the way below 0° Fahrenheit before they start to lose capacity”
Why aren't we all using heat pumps? (Simon Clark)“today's heat pumps work down to -20° F or or -30° C”
Homeowner Heat Pump FAQs - Efficiency Maine (efficiencymaine.com)“Many heat pumps provide efficient heating down to -22°F or lower, regardless of windchill.”
Seriously good cold-climate heat pumps are headed to the US market (Electrek)“with some units operating at temperatures as low as –15F (–26C) while still meeting energy efficiency requirements.”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“continue to [clears throat] provide heat down to minus 13 or colder.”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“The reality is that modern hyper heat units are no problem even in colder climate.”
Heat Pumps | Mass Save (Mass Save)“many provide efficient heat at outdoor temperatures as low as -15 °F”
Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips (HouseBarons)“more than capable of heating the house even at below zero temperatures without crazy utility bills”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Many can operate down to -5°F to -13°F, maintaining a significant share of their rated capacity at 5°F.”
Cold Climate Heat Pumps: Everything You Need to Know - Trane® (Trane Residential)“can provide up to 107% heating capacity down to 5°F and up to 85% down to -20°F.”
What's the true cost of a heat pump? (Grist)“air-source heat pumps that work when the outside temperature is down to negative 31 degrees Fahrenheit.”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“many heat pumps can Now operate down to negative 22 degrees”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“the modern heat pumps can provide a functional heat down to about minus 30°”
Heat pump in Canada - Does it work long term? (Your Electric Neighbour)“we're using only the heat pump to heat our house at this point”
Very likely right AI guessNEEP-listed cold-climate models operate and deliver useful heat at -5°F to -22°F, with reduced capacity.
Leans right RMI 2018, the economics of electrifying buildings lines 966-970RMI's modelled cold-climate unit provides substantial heat down to -13F (COP 1.4 there), based on manufacturer performance data.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 478-489A ductless cold-climate unit delivered a consistent median capacity from 10F to -15F and kept operating to -25F at reduced capacity, though the authors say it needs backup below -15F; one monitored unit.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1238-1247The prototype cold-climate units ran mainly in heat-pump-only mode even in the lowest outdoor bins, with resistance-only operation minimal above 0 F; but only 8 of 22 sites logged 10+ hours below 0 F, and auxiliary heat was on about 25% of the time at -10 to 0 F.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 1946-1951Among these ducted variable-speed units, Site 10's compressor did not run below 0F despite a disabled lockout, and the dual-fuel unit did not run below about 4F.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 2997-3002Even non-cold-climate mini-splits from 2012-14 kept operating below 0 F (at lower efficiency than cold-climate models), with COPs averaging about 1.5 at -10 to 0 F; capacity at those temperatures was not measured directly.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 528-536Cold-climate heat pumps can perform well down to -25°C (about -13°F), citing NRCan, though backup may still be needed in the coldest parts of Canada.

Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run

Probably right

Staggered-adoption study of 6,631 UK households: switching to Octopus's Cosy heat pump time-of-use tariff saved about £318/yr (about 18% of the electricity bill), £78 from the tariff structure alone and £240 from shifting load; savings are vs the same supplier's flat tariff, and the authors are linked to Octopus.

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Asserts (24)Denies (2)Verdicts (5)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“several moments when energy prices dropped significantly and that closed that spark gap and made the air source heat pump cheaper to run”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“just by being on the right tariff, the economics flip entirely.”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“on that variable rate plan here in the winter the electric cost is generally always lower”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“octopus's smart tariffs tend to be much cheaper than the price cap when running a heat pump”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“three cheaper periods spread throughout the day, allowing your heat pump to operate at less cost.”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“Eversource has a winter rate program that cuts distribution and transmission costs by about 23% from November through April.”
Massachusetts homeowners say state is ignoring cost in push toward all electric heat (WCVB Channel 5 Boston)“DPU IS ORDERING UTILITIES TO PROVIDE REDUCED ELECTRIC RATES IN WINTER FOR CUSTOMERS WITH HEAT PUMPS.”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“simply running when the electricity prices are the lowest”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“i'm on a time of use rate plan”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“I have the Octopus Intelligent Go tariff I get a tariff overnight for 6 hours at 7.5.”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“shifted your electricity usage out of peak times you could save 220 compared to gas”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“Unitil’s rate, which is available this year and will be offered annually from November through April, decreases the electric delivery charge by nearly two-thirds.”
The advance of heat pumps bumps up against cost concerns - The Boston Globe (BostonGlobe.com)“Let’s hope the state quickly enacts heat pump-friendly rates, in a permanent manner.”
Need air conditioning? Consider the heat pump. (Canary Media)“Utility customers with access to electricity rates that favor heat pumps can save even more.”
Will a heat pump save you money? It depends (Canary Media)“some utility customers in Maine can already get lower electric rates for using heat pumps”
New winter rates saved at least $37M for Massachusetts heat-pump… (Canary Media)“Massachusetts consumers with home heat pumps saved some $37 million on their power bills — an average of more than $250 per customer”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“heat pump users can lower their operating costs through using dedicated tariffs.”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“once you've got that time of day tariff, then a heat pump will be considerably cheaper”
Heat Pumps | Mass Save (Mass Save)“Seasonal Heat Pump Rate, which offers lower electric rates from November through April to help make heat pump operation more affordable.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“to ComEd’s electric heating rate, which offers lower electricity prices”
How Heat Pumps Reduce Energy Bills and Air Pollution in the San Francisco Bay Area (RMI)“When this efficiency is paired with beneficial electric rates, the savings grow.”
The TRUE Payback Time for Heat Pumps (Heat Geek)“heat pumps can make use of time of use tariffs”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“Can you really just utilize a few smart tariffs and still be cheaper than gas? Well, yes, I believe so.”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“simply switch to many of the heat pump tariffs out there or any of the flexible tariffs, you'll be saving potentially hundreds”
DENIES Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“it will cost you more to have a heat pump and be on cozy octopus than it would do to keep your gas boiler”
DENIES I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“Cozy octopus would have actually have cost more.”
Very likely right AI guessOff-peak and heat pump tariffs cut the average price paid per kWh when heating can be shifted, lowering running cost.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1898-1906Staggered-adoption study of 6,631 UK households: switching to Octopus's Cosy heat pump time-of-use tariff saved about £318/yr (about 18% of the electricity bill), £78 from the tariff structure alone and £240 from shifting load; savings are vs the same supplier's flat tariff, and the authors are linked to Octopus.
Leans partly right RMI 2018, the economics of electrifying buildings lines 748-755In RMI's models a tariff alone does not cut costs: a standard heat pump on Houston's Free Nights rate costs more than on a flat rate, and only flexible control on steep tariffs (3:1 TOU, Free Nights) saved about $1,000-2,000 over 15 years, while mild default TOU gave too little.
Leans right Mass Save 2026, air-source heat pump rebates lines 30-33Mass Save: eligible customers can get a Seasonal Heat Pump Rate with lower electric rates November through April 'to help make heat pump operation more affordable'; time-of-use rates are only described as future options.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 754-757Where time-of-use rates exist there may be an opportunity to shift heat pump use off-peak and improve bill savings; not analysed.

Heating with a heat pump costs less than heating with a natural gas furnace

Leans wrong

In the UK at 2024 prices on a standard flat tariff, heat pumps cost about £190 more per year to run than the gas boilers they replaced (boilers, not furnaces); only a heat pump time-of-use tariff reverses this.

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Asserts (16)Denies (10)Verdicts (9)

Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“unless you're in that kind of situation where you're getting free gas I would say we can definitely save you money”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“a well-designed heat pump that's using one or more of these other levers should cost less to run than a boiler.”
Real Heat Pump Running Costs: A Full Year of Data From 5 Real Homes (Lloyd's Gas & Renewables)“in most cases that they're going to be cheaper than than a gas boiler to to run”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“This has the potential to save you approximately $300 or more annually.”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“even with a standard electricity tariff uh a heat pump will be cheaper than a gas boiler.”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“heat pumps are more energy efficient than gas systems and should be able to save you $300 to $500 in energy cost each year”
Converting a Furnace To A Heat Pump! (HVAC GUY)“that bill is going to be much smaller for them”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“it's now cheaper to run a heat pump in your home than it is a gas boiler”
Need air conditioning? Consider the heat pump. (Canary Media)“Households ditching gas heating can see an average of $60 in savings per year.”
Will a heat pump save you money? It depends (Canary Media)“for more than half of homes that use natural gas for heating, there was a financial benefit from switching to a heat pump”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“Even on the price cap, you're saving just over £100.”
How Heat Pumps Reduce Energy Bills and Air Pollution in the San Francisco Bay Area (RMI)“When a home replaces both its gas water heater and its gas furnace with heat pumps, nearly 90% of homes still see lower bills”
The TRUE Payback Time for Heat Pumps (Heat Geek)“new efficient heat pump systems designed well and installed well will be 32 percent more efficient or cheaper to run”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“the gas boiler about three times more expensive. even when my heat pump is struggling to be efficient”
What's the true cost of a heat pump? (Grist)“That means that you'll still be saving some money, just not quite as much.”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“because they save a lot of money”
DENIES Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“There isn't a huge leap between these two technologies when it comes to the running costs.”
DENIES Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“it has been rare to see scenarios where heat pumps are cheaper to run than furnaces”
DENIES Heat Pump Economics in Massachusetts (Abode Energy Management)“right now when we are looking at this and looking at today's fuel prices natural gas is going to be the most affordable”
DENIES Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“when you're told that having a heat pump will save you money, the reality is for most people, that is not true”
DENIES Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“natural gas is more affordable in 41 out of 50 states when comparing ENERGY STAR natural gas furnaces to ENERGY STAR electric heat pumps.”
DENIES Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association (American Gas Association)“The energy cost of the all-electric home using a cold-climate heat pump is $1,458, or 37% higher than the natural gas home.”
DENIES Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“at national average prices gas is slightly cheaper per unit of heat than a heat pump running at COP 3.0.”
DENIES Out of Gas: New York’s Blocked Pipelines Will Hurt Northeast Consumers (Manhattan Institute)“for residential users, heat pumps are more expensive than natural gas-fired heating units in almost all cases”
DENIES Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“natural gas heating remained more affordable than heat pumps in 41 states, including New Hampshire and the rest of New England.”
DENIES Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“now obviously gas would do better than geothermal and would be cheaper”
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 409-415For gas-heated homes with AC, the share with lower bills ranges from 38% (minimum-efficiency, median -$70/yr) to 99% (cold-climate high-efficiency, median $380/yr), and only 5-58% for gas homes without AC; it holds only for efficient equipment.
Leans wrong Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1855In the UK at 2024 prices on a standard flat tariff, heat pumps cost about £190 more per year to run than the gas boilers they replaced (boilers, not furnaces); only a heat pump time-of-use tariff reverses this.
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 56-61Edwards says heat pumps are cost-effective in many places but can cost more to operate than gas furnaces, especially in colder regions, so the blanket claim fails.
Leans wrong RMI 2018, the economics of electrifying buildings lines 158-161In RMI's gas retrofits, heat pump households pay more for energy in Chicago and Providence and save too little to recover the extra capital in Houston and Oakland.
Leans wrong Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 962-966At 2015-16 Massachusetts/Rhode Island prices, the break-even temperature against an 80%-efficient gas system was above 70 F (above 58 F for cold-climate units), so a mini-split was essentially never cheaper to run than gas; the test units were 2012-14 models (a modelled HSPF-13 unit moves the break-even to 28-40 F).
Leans partly right AI guessUS modelling finds efficient heat pumps lower bills for many gas-heated homes, but where gas is cheap relative to electricity many see higher bills.
Leans partly right EIA, state residential electricity and gas prices lines 191-193At 2024 average prices a seasonal COP of 2.5 beats a 95% furnace in only 11 states; 30 states need COP 3 or more, so it depends on location and efficiency.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1133-1150Canadian lifetime-cost modelling finds heat pumps beat gas heating plus AC in nearly all cases in Montreal, Halifax and Vancouver and usually in Toronto with gas backup, but not in many Edmonton cases; the comparison also counts cooling and equipment.
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1666-1673Survey comments from participants who had gas repeatedly said bills were higher than with natural gas; this is anecdotal (no billing analysis, small affiliated sample).

A heat pump replaces both the furnace and the air conditioner with one system

Probably right

Edwards explains that heat pumps heat and, by reversing the refrigerant, cool, replacing the separate furnace and air conditioner of a conventional system.

· denied 0 ·

Asserts (25)Denies (0)Verdicts (6)

Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“the short answer to that can a heat pump replace a furnace yes”
How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“it's a dualpurpose system”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“Heat pumps are versatile, efficient, and great for both heating and cooling”
Mini-Split 2 Year Review | COLD CLIMATE (Jacob Shields)“I have the benefit of uh AC in the summer”
Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“heat pumps only heat and that's actually not true at all”
I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“this is the only thing that we use to heat and cool our home.”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“air conditioners are heat pumps it bothers me so much that I have a heat pump but it only pumps out”
AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“heat pumps can provide heating and cooling, whereas ACs only provide cooling”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“They especially love that the heat pumps double as air conditioning in the summer.”
Need air conditioning? Consider the heat pump. (Canary Media)“All-electric heat pumps are ACs, but better.”
Heat pumps have so far withstood the death of federal tax credits (Canary Media)“heat pumps — which can both cool and warm homes and wean buildings off polluting gas furnaces”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“A heat pump heats and cools your home, functioning like a combined furnace and central air conditioner.”
Why aren't we all using heat pumps? (Simon Clark)“a heat pump is an appliance that can both heat and cool a building”
How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“they're also an air conditioning system, and an air conditioning system that pays for itself”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“A heat pump is also your air conditioner.”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“there's no need to install a separate cooling system like an air conditioner”
Heat Pumps | Mass Save (Mass Save)“Heat pumps can efficiently heat in the winter and double as a cooling system in the summer”
How a Ductless Heat Pump Can Save You Money and Energy | Mitsubishi Electric HVAC US (mitsubishicomfort.com)“switching to a ductless heat pump system can kill two birds with one stone, bringing both cooling and heating in one system.”
Heat Pump vs. Air Conditioner: Full Comparison and Breakdown (Yarbrough & Sons Heating, Cooling & Plumbing)“A heat pump can heat your home and is a viable option as a primary heat source.”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“since a heat pump houses both Heating and Cooling elements”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“Full-load cold climate heat pumps replace both a furnace or boiler and an air conditioner (AC).”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“a modern, energy-efficient alternative that can provide both heating and cooling”
Cold Climate Heat Pumps: Everything You Need to Know - Trane® (Trane Residential)“they act as an energy-efficient air conditioner in the summer.”
What's the true cost of a heat pump? (Grist)“your heat pump will also double as an A/C”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“this is an all-in-one system. It is an air conditioner in the summertime”
Almost certainly right AI guessA heat pump provides both heating and cooling, so it replaces a separate AC, though some homes keep a backup furnace.
Probably right Edwards 2024, inequities in heat pump bill savings lines 820-827Edwards explains that heat pumps heat and, by reversing the refrigerant, cool, replacing the separate furnace and air conditioner of a conventional system.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 130-134Air-to-air heat pumps are reversible and provide air conditioning, which makes their incremental cost over a legacy furnace plus AC more favourable.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1531-1536At most sites a furnace was replaced by a single ducted cold-climate heat pump that then supplied both heating and cooling (median cooling COPs 3.4-5.4) with built-in resistance backup.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 543-551Heat pumps double as cooling, but a backup heating system may still be needed in parts of Canada during the coldest periods and insurers often require one, so the model adds backup in every city.
Leans right Mass Save 2026, air-source heat pump rebates lines 11-18Mass Save: air-source heat pumps extract outdoor heat in winter and reverse to cool in summer, and whole-home rebates go to homes using the heat pump as the sole source of heating and cooling.

Pairing a heat pump with rooftop solar makes it much cheaper to run

Leans partly right

Solar lowers the effective electricity price, but winter heating demand peaks when solar output is lowest, so the gain depends on net metering terms.

· denied 0 ·

Asserts (23)Denies (0)Verdicts (4)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“completely turns the tables in favor of an air source heat pump and it's combining one of those with solar”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“with a heat pump, you can generate your own electricity via solar.”
Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“if you have a surplus of solar energy you can run oftentimes run your heat pump for free”
Real Heat Pump Running Costs: A Full Year of Data From 5 Real Homes (Lloyd's Gas & Renewables)“I know it was a lot less for this customer as well cuz they have solar and batteries”
How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“operating cost of my HVAC and hot water setup is, well, it's basically zero.”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“solar panels generating free P power to power our heat pump and therefore free Heat”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“when you combine them with solar panels and a home battery, the benefits really start to stack up.”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“in my case i'm not paying the standard rate i have solar and i also have battery storage”
Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“So in my circumstances, with solar and batteries, a heat pump is a no-brainer.”
Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“some of our heat pump customers actually enjoyed a zero-dollar heating bill”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“the solar panels gave me all of the solar required to run these all the way through the day for free.”
AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“these systems can be powered through solar panels to help offset some of the operating costs”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“If a home has solar panels or highly efficient heat pumps rated for the coldest climate, bills generally stay lower”
Does a Heat Pump Actually Save Money? (EnergySage)“Pairing a heat pump with rooftop solar is one of the most effective ways to offset that.”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“If you've got solar panels, the math gets even better.”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“with a heat pump you can always add a PV array to offset some of the operating costs”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“It does justify it for us, but only because of the bigger battery system, the solar panels.”
The TRUE Payback Time for Heat Pumps (Heat Geek)“allows you to store free solar power driving your costs down even more”
I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“If you've got solar and batteries, a boiler is going to be 160 percent more expensive to run than running a heap hump.”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“if you've got enough battery storage, you've got solar panels, you've got a heat pump, you're absolutely quid in”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“the other way that you can almost guarantee you save money is by putting in solar panels”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“free energy from the sun, heat your house. so they're amazing.”
Heat pump in Canada - Does it work long term? (Your Electric Neighbour)“I offset that with solar so at the end of the day um it's a wash”
Leans partly right AI guessSolar lowers the effective electricity price, but winter heating demand peaks when solar output is lowest, so the gain depends on net metering terms.
Leans right RMI 2018, the economics of electrifying buildings lines 1195-1203In RMI's single Oakland retrofit scenario, a 6.5 kW solar array cut annual energy costs from $2,900 to $170 and brought net present cost below gas, but added over $15,000 upfront.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 1954-1966LBNL: the Electrification with PV cluster had the largest energy and cost savings, and solar is a reliable way to reduce energy cost, but its value depends on net-metering rules, and these whole projects still needed about $20k of cost cuts to break even.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1132-1142UK households with solar PV had a smaller rise in daytime grid electricity after a heat pump, but no noticeable difference in overall consumption, though the authors note low power to detect it.

A heat pump costs more to buy and install than a gas furnace

Leans right

LBNL: among 2,298 HVAC measures, fuel-fired heating systems averaged $3,000 less than heat pump installations (heat pump median $8,027 vs furnace median $5,025 in 2019 dollars), though heat pumps also provide cooling.

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Asserts (22)Denies (1)Verdicts (9)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“an air source heat pump right now, on average, is about 4.3 times higher than a gas boiler install”
Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“the major challenges for making heat pumps the mainstream choice are the upfront cost”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“an average heat pump installation is now around”
This is Why Heat Pumps May NOT Be The Future (Skill Builder)“But now you've got to spend, I would say, £16,000 doing the extra work to make the heat pump work.”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“the upfront installation costs can be hefty.”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“for upfront cost the furnace is going to be the cheapest the heat pump is going to be the most expensive”
Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) (Electric Vehicle Man)“they are financially viable for a lot of people they're not quite frankly they're very expensive”
Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“New heat pumps typically cost between $2,500 and $10,000 to install”
Will a heat pump save you money? It depends (Canary Media)“a like-for-like furnace or boiler replacement (i.e. swapping a broken gas system for a new gas one) costs on average just $5,000”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“It is true that heat pumps are more expensive to buy than gas boilers.”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“paid a median price of $8,348 to purchase and install a heat pump vs. $6,221 for a gas furnace.”
Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“They can be one of the more expensive replacements for furnaces and boilers and stuff that you'll have in your lifetime”
Does a Heat Pump Actually Save Money? (EnergySage)“the wholesale cost of a cold-climate heat pump is roughly three times the cost of a basic furnace and twice the cost of a boiler.”
3 ways heat pumps save you money (homes.rewiringamerica.org)“Heat pumps cost more upfront (average heat pump installation is $16,000)”
Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“is one of the reasons heat pumps are more expensive than [music] normal boilers.”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“I'm probably paying four,5,000 more for a heat pump than I would for an equivalent gas boiler swap out.”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“you can expect a higher upfront invest cost with heat pumps”
Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“even supporters acknowledge that heat pumps are pricey to install, with costs typically ranging from $8,000 to $15,000.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“they typically have an up-front cost premium relative to traditional system replacements”
The TRUE Payback Time for Heat Pumps (Heat Geek)“compared to the what two and a half grand for a typical kind of boiler swap”
What's the true cost of a heat pump? (Grist)“the prices for a gas furnace are about the same, $10,500 and $6,000”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“they're still generally more expensive”
DENIES Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“So often times it comes down to a wash depending on what is in your home currently.”
Almost certainly right AI guessInstalled heat pump costs typically exceed a gas furnace or boiler replacement by several thousand dollars or pounds.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 804-807Replacing the existing heater with a minimum-efficiency heat pump costs an average of $6,600 more than replacing it like-for-like.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 451-457In cold-climate homes without central AC, the mean incremental cost over a furnace alone is $3,000, $15,000 and $18,000 for the three heat pump tiers.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 3027-3031LBNL: among 2,298 HVAC measures, fuel-fired heating systems averaged $3,000 less than heat pump installations (heat pump median $8,027 vs furnace median $5,025 in 2019 dollars), though heat pumps also provide cooling.
Leans right RMI 2018, the economics of electrifying buildings lines 158-161RMI finds that customers with existing gas service face higher upfront costs to retrofit to electric space and water heating than to install new gas devices.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1821-1825UK figures: an air-source heat pump installation averaged £12,713 before the grant (£5,213 after it) against an assumed £2,250 gas boiler; this compares with a UK boiler rather than a furnace.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1176-1197Canadian mid-case capital costs for a detached home: gas furnace about $3,750 to $6,030 against $7,570 to $13,260 for a standard ducted air-source heat pump and $14,840 to $19,880 for a cold-climate one (the heat pump also replaces the AC).
Leans right Edwards 2024, inequities in heat pump bill savings lines 1838-1854From Edwards' national cost medians, a heat pump costs $6,185 while a gas furnace plus AC costs $6,455 and the AC alone $4,684, which puts the furnace alone at roughly $1,800, far below the heat pump.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1360-1375Database costs put an air source heat pump at $2,994-$5,550 versus a propane furnace at $2,060-$3,900; a propane rather than gas furnace, and cost estimates rather than quotes.

Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid

Probably right

On the 2024 UK grid, replacing a gas boiler with a heat pump cut household energy CO2eq by about 1.16 t/yr, 36% of the pre-adoption footprint, from measured consumption changes and government emission factors.

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Asserts (19)Denies (3)Verdicts (7)

Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“a heat pump can move more heat energy into a living space than the natural gas itself contains”
Heat Pumps: the Future of Home Heating (Technology Connections)“even on today’s fossil-fired power grid, they’re a wiser use of limited resources and can help lower emissions.”
The Trouble With Heat Pumps (Sabine Hossenfelder)“an estimate from the USA says that they would go down by a similar factor”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“reduced our heating emissions by almost 70%”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“they're having such a dramatic impact on reducing carbon footprint.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“will reduce the total amount of fuel required to heat your home over a year — even with today’s electric grid.”
Heat Pump Economics in Massachusetts (Abode Energy Management)“significantly better than natural gas significantly better than propane home heating oil or electric resistance”
Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“They're better for the environment.”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“they emit less than burning gas locally in most cases and on a year on a year-over-year level certainly they do”
Do Heat Pumps Really Work in Cold Climates? (Bosch Home Comfort)“Switching to a heat pump is a great way to reduce your home’s carbon footprint”
Will a heat pump save you money? It depends (Canary Media)“Heat pumps are undisputed winners for the climate.”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“a heat pump would cut CO2 emissions by 77-86% over 15 years compared with a gas boiler”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“Switching from a gas furnace to an electric-powered heat pump will reduce a home’s heating-related carbon emissions by 40 to 70 percent”
Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“running a heat pump could cut a home's CO2 emissions”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“air source heat pumps produce fewer carbon emissions”
Heat Pumps | Mass Save (Mass Save)“Heat pumps have the lowest carbon emissions of any heating source.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“heat pumps installed today can cut lifetime operational emissions by over 50% compared to a gas furnace in Illinois”
What's the true cost of a heat pump? (Grist)“switching to a heat pump can save you anywhere from about 1 metric ton to about 7 metric tons of carbon emissions every single year.”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“by using less combustion, we are lowering our carbon footprint”
DENIES Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“a natural gas ENERGY STAR household can have a carbon footprint 19% lower than an ENERGY STAR heat pump household”
DENIES Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association (American Gas Association)“natural gas homes on average can reach 11 percent lower emissions this year than with the use of many advanced air-source heat pumps”
DENIES The advance of heat pumps bumps up against cost concerns - The Boston Globe (BostonGlobe.com)“the majority of electricity in Massachusetts is sourced from gas- and coal-fired power plants. Until we clean up the source of our electricity”
Very likely right AI guessNREL and other modelling find air-source heat pumps lower emissions versus gas furnaces in most US regions on the current grid.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 193-198On the 2024 UK grid, replacing a gas boiler with a heat pump cut household energy CO2eq by about 1.16 t/yr, 36% of the pre-adoption footprint, from measured consumption changes and government emission factors.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 249-251Average lifetime GHG savings are positive in every state for every heat pump and grid scenario, including the conservative high-renewable-cost grid, though these are 2022-2038 long-run marginal grid factors rather than today's grid.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 677-681Heat pump adoption raises CO2 for only 2.1% of US houses, though the model assumes grid emissions fall 45% over the heat pump's life.
Leans partly right RMI 2018, the economics of electrifying buildings lines 225-231On 2016 short-term marginal grid data, heat pumps cut emissions versus gas in Oakland, Houston and Providence but raised them in coal-heavy Chicago (about 50% more), so the claim holds on most grids but not all.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 459-462Even on relatively emissions-intensive electricity, heat pumps emit 20 to 30% less than gas furnaces (citing IEA 2022 and a consultancy), and near zero on clean grids.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 1947-1952LBNL: fuel switching boosted carbon cuts (68% vs 50%) in the electrification cluster, but those projects were mostly in states with low-carbon grids, and the authors expect lower carbon savings where electricity is more carbon-intensive.

From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000

Very likely right

IRS 25C page: from 2023 the credit equals 30% of qualified expenses, with a $2,000-per-year cap for qualified heat pumps (installation labor included).

· denied 0 ·

Asserts (22)Denies (0)Verdicts (3)

Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“The $2,000 credit for a heat pump ran out at the end of December.”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“households can claim a tax credit for 30% of the cost of buying and installing a heat pump, up to $2,000!”
INFLATION Reduction Act Means MONEY for HVAC! (HVAC Guide for Homeowners)“can take it credit up to two thousand dollars”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“the federal tax credit for qualified heat pump systems offers around $2,000 in tax credits”
Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“they can write off 30% of that cost, up to $2,000”
Need air conditioning? Consider the heat pump. (Canary Media)“the Energy Efficient Home Improvement Credit, which can take up to $2,000 off your federal tax bill for a qualifying heat pump”
Will a heat pump save you money? It depends (Canary Media)“The 2022 Inflation Reduction Act includes a $2,000 federal tax credit for heat pumps”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“able to get a tax credit worth 30 percent of the cost to buy and install qualifying heat pumps, up to $2,000.”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“right now on all Airsource heat pumps, which are traditional style heat pumps, there is a $2,000 tax credit that is federal.”
Here's how to take the sting out of the cost of installing a heat pump (Electrek)“households get a 30% tax credit for heat pumps and heat pump water heaters, capped at $2,000 per year”
For Most Americans, A Heat Pump Can Lower Bills Right Now (Energy.gov)“It also created the Energy Efficiency Home Improvement tax credit — up to $2,000 per household per year for 10 years — for heat pumps”
Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“Section 25C tax credit Up to $2,000 (30% of cost) Expired Dec 31, 2025”
Federal Tax Credits for Energy Efficiency (ENERGY STAR)“These energy efficient home improvement credits are available for 30% of costs - up to $2,000”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“up to two $2,000 in federal tax credits for qualifying heat pumps”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“That includes a $2,000 cap for heat pumps and heat pump water heaters”
25C Heat Pump Federal Tax Credits: A Guide (homes.rewiringamerica.org)“The 25C Energy Efficient Home Improvement Tax Credit provides a tax credit for eligible heat pumps up to 30% of project costs, capped at $2,000.”
3 ways heat pumps save you money (homes.rewiringamerica.org)“Your household can receive a 30 percent tax credit each year (up to $2,000) to buy and install heat pumps”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“The Section 25C credit (30%, up to $2,000 for qualifying heat pumps) ended for property placed in service after December 31, 2025.”
Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“And critically, it also covered efficient heating and cooling equipment, including heat pumps.”
Heat Pump vs. Air Conditioner: Full Comparison and Breakdown (Yarbrough & Sons Heating, Cooling & Plumbing)“Now, on the heat pump side has a 25c tax credit maximum of $2,000.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Qualifying electric heat pumps may receive up to $2,000 per year in federal tax credits.”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“for your traditional air source heat pumps it's a $2,000 annual cap”
Almost certainly right AI guessThe IRA's 25C credit gave 30% up to $2,000 for qualifying heat pumps placed in service 2023-2025; the 2025 budget law ended it.
Very likely right IRS, the 25C home improvement credit lines 10-25IRS 25C page: from 2023 the credit equals 30% of qualified expenses, with a $2,000-per-year cap for qualified heat pumps (installation labor included).
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 620-625The paper refers to claiming a $2,000 IRA tax credit for a heat pump in 2023, consistent with the cap; it does not state the 30% rate.

High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces

Probably right

UK heat pump households (measured consumption times retail prices) pay about £190/yr more to run a heat pump than a gas boiler at Octopus standard rates (£323 at government 2024 prices), with electricity about 4x the price of gas per kWh; disconnecting from gas trims about £100/yr off the gap.

· denied 0 ·

Asserts (21)Denies (0)Verdicts (9)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“that current spark gap means it isn't automatically cheaper to run than say a high efficiency gas boiler”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“you're paying 50% more per unit of heat with a heat pump under these conditions.”
Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“a very cold climate and very cheap natural gas prices it is almost always more efficient to run a high efficiency furnace”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“your electricity is 15 cents per kilowatt hour well then you're never gonna get a heat pump to beat the cost of gas”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“gas per unit of energy is significantly cheaper than electricity in the UK”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“even highly efficient heat pumps can cost more to operate than a gas furnace.”
Massachusetts homeowners say state is ignoring cost in push toward all electric heat (WCVB Channel 5 Boston)“THE STATE NEEDS TO BRING DOWN ELECTRICITY COSTS TO DRIVE WIDER ADOPTION OF ELECTRIC HEAT.”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“electricity at the standard rate 11 more expensive than heating with gas”
Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“For heat pumps to beat gas on cost without the added costs of solar and batteries, electricity pricing needs to change.”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“in order for it to break even with a gas boiler, we need to be trying to get four”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“running a heat pump on this standard tariff would cost an extra £78”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“Heat pumps are powered by electricity, and in Massachusetts, electric rates are among the highest in the nation.”
The advance of heat pumps bumps up against cost concerns - The Boston Globe (BostonGlobe.com)“there is no getting around the high cost of Eversource’s electricity delivery charges”
New winter rates saved at least $37M for Massachusetts heat-pump… (Canary Media)“Worries about high electricity rates, however, have been a more stubborn barrier to adoption, particularly for homeowners heating with natural gas”
Does a Heat Pump Actually Save Money? (EnergySage)“If you live in a cold climate and currently have natural gas for heat, a heat pump will usually cost more to run”
Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“heat pumps don't always pay for themselves in Norther climates in areas served by natural gas, because natural gas tends to be pretty cheap”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“expensive-electricity, cheap-gas states (Alaska, Michigan, New York) favor gas.”
Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“New Hampshire residents pay among the highest electricity prices in the country.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“If local electricity is lower, the heat pump is cheaper to run; if higher, the furnace wins.”
I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“if you don't have solar and ore batteries, a heat pump might actually cost you a little bit more to run”
Which home energy upgrades will save you money? We did the math. (Washington Post)“In Maryland, electricity is about three times the cost of gas, sapping most of the benefits of switching to a heat pump.”
Very likely right AI guessWhen the electricity-to-gas price ratio exceeds the seasonal COP divided by boiler efficiency, as on UK standard tariffs with average COPs, heat pumps cost more per unit of heat.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1863UK heat pump households (measured consumption times retail prices) pay about £190/yr more to run a heat pump than a gas boiler at Octopus standard rates (£323 at government 2024 prices), with electricity about 4x the price of gas per kWh; disconnecting from gas trims about £100/yr off the gap.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 962-966With New England's high electricity-to-gas price ratio, the gas break-even temperature was above 70 F, so a mini-split 'does not offer a viable direct replacement for a gas-fired system at today's energy prices'.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 538-553A higher elec-to-gas price ratio (4.1 at 2019 prices vs 3.3) cuts gas homes with positive bill savings from 32-92% to 22-83%; it worsens the economics but most efficient units still beat gas.
Leans right RMI 2018, the economics of electrifying buildings lines 812-816In RMI's Providence model, a cold climate, a leaky home and relatively high electricity prices together make a heat pump retrofit cost more than gas.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1026-1029Edwards notes that higher electricity prices reduce the benefit of replacing a furnace with a heat pump, and its robustness checks find electricity price negatively correlated with heat pump use where direct fuels dominate.
Leans partly right EIA, state residential electricity and gas prices lines 188-193Whether a high price ratio makes heat pumps costlier depends on seasonal COP: break-even is ratio times AFUE, ranging from 1.6 (Florida) to 6.1 (Alaska) at 2024 prices, with 30 states needing COP 3 or more.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2700-2710LBNL: some electrification projects raised energy costs by up to $1,000/yr, confirmed to come from higher electricity use paired with high regional rates (MA $0.184, CA $0.169, VT $0.154/kWh); savings were large mainly where oil or propane was displaced.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1147-1158Modelled for Edmonton: much lower gas prices with similar electricity rates, plus cold weather, make gas with AC (or a hybrid) the cheapest option and all-electric heat pumps less competitive.

Heat pumps do not work in very cold climates

Probably wrong

In monitored Minnesota homes cold-climate ASHPs cut heating costs 30-56%; cold weather raised backup and defrost use and lowered heat pump performance but overall system efficiencies remained high.

· ·

Asserts (3)Denies (17)Verdicts (7)

Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“Right now they don't work so well in climates like mine because when the temperature outside drops below freezing”
Mini-Split 2 Year Review | COLD CLIMATE (Jacob Shields)“your whole Winter's this temperature I don't think it would work for you”
Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“Taxpayers On The Hook For Tech That Falls Flat In The Cold”
DENIES The Truth About HVAC Scams & Heat Pump Hype | Handy Bros. CEO Sets the Record Straight (Handy Bros. Home Comfort)“heat pumps do work and they do work very well in this climate”
DENIES Why Heat Pumps are now leaving people COLD (Silver Cymbal)“heat pumps cannot work in cold climates now that is absolutely false”
DENIES Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“Low temperatures used to be a problem, but newer iterations of ASHPs implement multiple strategies to keep themselves running during extreme weather.”
DENIES Why Heat Pumps are Immensely Important Right Now (Technology Connections)“But we are definitely one of those places where the conventional wisdom says heat pumps don’t work.”
DENIES Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) (Electric Vehicle Man)“that's what the radiators are at and yet my house is still warm”
DENIES Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“heat pumps do not work well in cold weather. Now, this could not be further from the truth.”
DENIES HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“stop saying that heat pumps don't work in cold weather that is outdated information”
DENIES Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“the bottom line is that modern heat pumps work well in most cold climates”
DENIES Heat Pump SHUT OFF Temp with AUX HEAT! (HVAC Guide for Homeowners)“We're seeing markets and climates that these systems are being installed in and saving folks energy”
DENIES Do Heat Pumps Really Work in Cold Climates? (Bosch Home Comfort)“the belief that heat pumps can’t work in low temperatures is a common misconception”
DENIES Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“These three countries have the highest heat pump sales per 1,000 households on the continent.”
DENIES Heat Pumps in 2026 | What you should know (The Thought Provocateur)“But the bottom line is this is just a myth.”
DENIES Why aren't we all using heat pumps? (Simon Clark)“if you've ever heard that heat pumps don't work in cold climates you can probably thank your local gas company”
DENIES Homeowner Heat Pump FAQs - Efficiency Maine (efficiencymaine.com)“Properly sized, selected, and located heat pumps can heat a home without backup.”
DENIES Seriously good cold-climate heat pumps are headed to the US market (Electrek)“These cold climate heat pumps (CCHPs) reliably delivered heat even during the coldest winter months”
DENIES A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“Heat pumps work in both warm and cold climates.”
DENIES Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)““Heat pumps do not work below freezing.” Modern cold-climate models heat effectively well below 32°F, many to -13°F.”
Very likely wrong AI guessCold-climate heat pumps are used widely in Maine, Canada and Scandinavia and keep delivering heat well below 0°F.
Probably wrong CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 495-518In monitored Minnesota homes cold-climate ASHPs cut heating costs 30-56%; cold weather raised backup and defrost use and lowered heat pump performance but overall system efficiencies remained high.
Leans wrong Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 2926-2935Across two New England winters, metered mini-splits kept heating below 0 F with average COP about 1.5 at -10 to 0 F, which the report calls far superior to resistance heat.
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 180-189Prototype cold-climate heat pumps in occupied northern US and Canadian homes kept a median COP of 1.9 at 0-5 F, with most units above the ENERGY STAR 1.75 threshold in the field.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 157-163Over 25,000 products on the NEEP cold-climate list keep a COP of 2 or more at full capacity at 5F, and modelled per-household GHG savings are generally higher in cold climates.
Leans wrong RMI 2018, the economics of electrifying buildings lines 356-358RMI notes that hundreds of models operate efficiently at 5F and some heat at -13F, and it models cold-climate heat pumps heating homes in Chicago and Providence.
Leans wrong Canadian Climate Institute 2023, heat pumps pay off lines 528-541Standard heat pumps perform well to -8 to -10°C and cold-climate models to -25°C; Norway, with temperatures similar to Canada's, leads the world in heat pump penetration, with confirmed real-world performance there.

Air sealing and insulation should come before or alongside a heat pump

Leans partly right

ResStock modelling: envelope upgrades cut bill-increase cases (39% to 19% with minimum-efficiency units) and shrink heat pump capacity, but add about $9,000 so the net upfront cost rises, raising positive-NPV share slightly in cold climates and lowering it in warmer ones.

· denied 0 ·

Asserts (18)Denies (0)Verdicts (7)

What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“A leaky house with a cold climate heat pump and electric heat backup heat is going to be an expensive house to heat.”
Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“The wisest thing we can do in the short term can be expressed in these three simple words: insulate, insulate, and insulate.”
What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“the next one is leakage and making sure that it's insulated especially if this is running in an unconditioned attic”
Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“utilize rebates for insulation and air sealing prior to installing heating and cooling upgrades”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“More insulation and better windows and doors will go hand-in-hand with building electrification”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“Better insulation comes first because it helps regardless of what you end up choosing”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“Add more of that to your home and all this gets easier!”
Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“I mean you really don't want to put a heat pump on a leaky house.”
Mini-Split 2 Year Review | COLD CLIMATE (Jacob Shields)“it is really airtight with the spray foam up top there's no air getting in”
Will a heat pump save you money? It depends (Canary Media)“It can even lower the upfront costs of a heat-pump system by up to $3,700, because a better-insulated home requires less heating power.”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“it’s always a good idea to first upgrade your insulation and seal any air leaks, regardless of how you heat the house.”
Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“if you do air sealing and insulation first, it's another $600 bonus if you do it before our heat pump HVAC system goes in”
Here's how to take the sting out of the cost of installing a heat pump (Electrek)“homeowners could “save thousands of dollars on average” by installing a smaller heat pump if they first improve their houses’ energy efficiency”
For Most Americans, A Heat Pump Can Lower Bills Right Now (Energy.gov)“investing in envelope upgrades like insulation and air sealing can mean that the cost of purchasing and installing a heat pump”
Federal Tax Credits for Energy Efficiency (ENERGY STAR)“if you are considering upgrading your heating and cooling system, it is wise to optimize your attic insulation first”
Heat Pumps | Mass Save (Mass Save)“Before upgrading your heating system, consider preliminary measures, such as sealing and insulating your ductwork or completing weatherization work.”
How a Ductless Heat Pump Can Save You Money and Energy | Mitsubishi Electric HVAC US (mitsubishicomfort.com)“You need to make sure you have adequate insulation, and that all window, door and attic air leaks are sealed.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“Weatherization can play a critical role in improving heat pump affordability”
Very likely right AI guessReducing heat loss lowers the required heat pump size and running cost; DOE and retrofit programs recommend envelope work first, though it is not strictly required.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 465-479ResStock modelling: envelope upgrades cut bill-increase cases (39% to 19% with minimum-efficiency units) and shrink heat pump capacity, but add about $9,000 so the net upfront cost rises, raising positive-NPV share slightly in cold climates and lowering it in warmer ones.
Leans right RMI 2018, the economics of electrifying buildings lines 972-977RMI's modelled new homes use 55-67% less heating energy than the leaky retrofits, and it recommends bundling insulation and sealing with heat pumps in inefficient homes, especially in cold climates (a recommendation, not a tested sequence).
Leans right Guidehouse 2025, review of the MA and CT heat pump study lines 345-356The MA/CT metering study lists weatherizing the home before heat pump installation as a program best practice for performance consistent with its savings.
Leans right DOE 2026, Program Notice 26-2 on electric home rebates lines 157-160DOE now requires homes to use rebates for insulation and air sealing before heating and cooling upgrades unless already sealed to a state level, 'to ensure upgrades do not increase consumer energy costs'; this is a program rule, not measured evidence.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1600-1612The policy analysis recommends that a ccASHP program include insulation and air-sealing incentives alongside the heat pump; a recommendation, not a measured result.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 2228-2237The authors call weatherizing before replacing a furnace with a heat pump best practice for cost savings and comfort, but the study homes were not weatherized and the effect was not tested.

Electric resistance heat costs far more to run than a heat pump

Probably right

Homes heating with electricity, oil or propane that have AC see positive bill savings in 95-100% of cases with median savings of $300-$650 a year at any efficiency level.

· denied 0 ·

Asserts (18)Denies (0)Verdicts (8)

MYTHS about Heat Pumps! (HVAC Guide for Homeowners)“the heat pump draws less electricity than when those heat strips turn on”
What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“It's simple and reliable, but expensive to operate.”
Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“anybody that has Total Electric is going to drastically improve by having a actual heat pump as opposed to using electric heat strips”
What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“historically electric baseboard has been the most expensive system to heat a building”
Heat Pumps: the Future of Home Heating (Technology Connections)“it would need roughly a third the electricity of a plain resistive heater to produce the same amount of heat.”
How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“it is expensive to run those heat strips”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“genuinely uses about a third of the electricity to produce the same heat as a resistance heater”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“they require a fraction of the energy of resistive heat”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“it's much more expensive when you're heating with traditional heat strips”
Heat Pump Economics in Massachusetts (Abode Energy Management)“electric resistance is over four thousand dollars while air source heat pumps are listed at close to one thousand five hundred dollars”
Contractor (Contractor Magazine)“you heat your home with those resistive electric elements — the most expensive way to heat”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“That's just an expensive space heater with better marketing.”
How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“I think those mini splits heat with about half as much electricity as conventional electric heaters would.”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“A heat pump at COP 3.0 delivers the same heat for one-third the electricity, $17.89.”
Electric bill shock! How to avoid 'emergency heat' costs (WSPA 7News)“THE AUXILIARY POWER OR EMERGENCY HEAT KICKS IN AND THAT SUCKS THREE TIMES THE ENERGY.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Electric resistance heat is costly; heat pumps are 2–4× more efficient than resistance heat.”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“about 50 percent less energy consumed when heating a home compared to Standard Electric heating systems”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“they use resistance heating and consume significantly more electricity than heat pumps”
Almost certainly right AI guessResistance heat has a COP of 1 while heat pumps average two to four over a season, so the same heat costs two to four times as much.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 393-401Homes heating with electricity, oil or propane that have AC see positive bill savings in 95-100% of cases with median savings of $300-$650 a year at any efficiency level.
Probably right Deetjen 2021, private economics of US residential heat pumps lines 653-657Switching homes with electric resistance heaters to heat pumps almost always produces a clear benefit, even after capital cost, especially in large older homes in cold climates.
Probably right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 376-382Against electric resistance baselines, the ductless and all-electric ducted heat pumps cut electricity use 46-56% with average cost savings of 53%, measured by alternating modes in the same homes.
Probably right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1184-1189Mini-splits stayed above COP 1.0 on average at nearly all outdoor temperatures, so they 'will nearly always be less expensive to operate than electric resistance heat'; the margin narrows to about 1.5x at the coldest temperatures.
Leans right Edwards 2024, inequities in heat pump bill savings lines 296-299In Edwards' county model, heating with electricity (taken as resistance) or non-gas fuels is generally more expensive, so the bill savings from a heat pump are largest there; heat pumps are cited as 3-5 times more efficient than resistance.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 463-467Heat pumps use up to 65% less energy than standard electric baseboard heating (NRCan), so switching from baseboards brings significant savings on the power bill.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1267-1273In the UK sample, the change in electricity use after a heat pump was lowest, indeed negative, for households that previously used electric heating, so the heat pump used less electricity than the resistance heat it replaced (a small subgroup).

A heat pump costs less to run than heating with oil, propane or electric resistance

Probably right

Homes heating with electricity, oil or propane that have AC see lower bills in 95-100% of cases (median $300-$650/yr); 73-86% without AC; still 87-99% (propane) and 66-100% (oil) at 2019 prices.

· ·

Asserts (15)Denies (3)Verdicts (8)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“having an air source heat pump rather than one of those boilers is going to be way cheaper to run”
Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“especially if you have propane you can definitely save quite a bit”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“as of now i only need to get a cop of two to be paying less than propane for heating”
Heat Pump Economics in Massachusetts (Abode Energy Management)“home heating oil we would see that it's always also going to be more expensive than a heat pump”
Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“In Juno, having one can save residents hundreds of dollars a year in heating costs.”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“you’re likely to save money over time if you switch to a heat pump, even when you include the cost of installing it.”
Contractor (Contractor Magazine)“Next year's energy bills, for this young family of three, will be slashed dramatically.”
Homeowner Heat Pump FAQs - Efficiency Maine (efficiencymaine.com)“heating with heat pumps is usually less expensive than heating with oil, kerosene, or propane”
Does a Heat Pump Actually Save Money? (EnergySage)“Heat pumps consistently save against propane, oil, and electric resistance heating almost everywhere.”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“it costs a lot of money to run the boiler though because it's on propane”
Heat Pumps | Mass Save (Mass Save)“In many cases, that additional electrical use is offset by savings elsewhere, such as a propane or oil heating fuel bill.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“residents upgrading from electric resistance or propane furnaces could reduce their annual energy bills by an average of $1,110 and $930”
Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“propane maybe not it could be really expensive to eat a house like this on propane even in a relatively warm climate zone 3”
What's the true cost of a heat pump? (Grist)“electricity is a lot cheaper than fuel oil and don't forget about heat pumps monster efficiency.”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“operational year-over-year will cost you less money to operate, especially homes in the East Coast where they're operating on heating oil”
DENIES Massachusetts homeowners say state is ignoring cost in push toward all electric heat (WCVB Channel 5 Boston)“HEATS HIS HOUSE MORE EVENLY THAN HIS OLD OIL SYSTEM, BUT SAYS THE COST OF THAT HEAT DOUBLED THIS WINTER.”
DENIES Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“even homeowners switching from that source could see their energy costs increase by a few hundred dollars over the cold season”
DENIES Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“electricity relatively expensive (.30/kw), I’ve opted to turn the heat pumps off and go back to oil.”
Very likely right AI guessAt typical US prices heat from a heat pump costs well below heat from oil, propane or resistance.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 393-401Homes heating with electricity, oil or propane that have AC see lower bills in 95-100% of cases (median $300-$650/yr); 73-86% without AC; still 87-99% (propane) and 66-100% (oil) at 2019 prices.
Leans right Edwards 2024, inequities in heat pump bill savings lines 296-299In Edwards' county model, where homes heat with electricity (resistance) or non-gas fuels, heating is generally more expensive and heat pump bill savings are higher.
Leans partly right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 376-382Measured cost savings averaged 33% against propane furnaces and 53% against electric resistance in Minnesota homes; oil was not tested, so the claim is supported for two of its three fuels.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3611-3619Mini-splits were cheaper to run than electric resistance and propane at all observed temperatures, but against oil they were cheaper only above a price-dependent break-even (about 32 F in 2016, 12 F in 2015).
Leans right RMI 2018, the economics of electrifying buildings lines 817-820In Providence, RMI's heat pumps have a lower 15-year net present cost than both oil and propane systems, and save at least $10,000 against propane.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1267-1273In the UK, households previously on electric heating used less electricity after a heat pump, which supports the resistance-heat part; oil and propane are not tested.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 463-467Heat pumps use up to 65% less energy than electric baseboards, which supports the resistance-heat part; oil and propane are not modelled.

Heat pumps save the most money in homes now heated with oil, propane or electric resistance

Probably right

Median bill savings of $300-$650/yr for electric, oil and propane homes with AC compare with -$70 to $380/yr for gas homes with AC.

· denied 0 ·

Asserts (16)Denies (0)Verdicts (8)

What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“the more expensive like resistant electric the easier it is to knock them off and say yes this is a good idea”
Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“if you consider a natural gas boiler, the savings are lower since gas is so cheap”
Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“especially in my area where it's propane laden, right? We have a lot of propane and it's expensive.”
Need air conditioning? Consider the heat pump. (Canary Media)“Families that go from relying on expensive delivered fuels to electric heat pumps unlock the biggest cost savings”
Will a heat pump save you money? It depends (Canary Media)““If you’re converting from fuel oil, propane or electric resistance, those tend to be pretty expensive heating fuels, so you could save quite a bit”
Here's how to take the sting out of the cost of installing a heat pump (Electrek)“For the 49 million homes that use electricity, fuel oil, or propane for heat and have AC, 92-100% of homes would see energy bill savings”
For Most Americans, A Heat Pump Can Lower Bills Right Now (Energy.gov)“savings are generally highest for homes that are currently using heating oil, propane, or older electric equipment”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“the mini-split only costs an average of fifty seven dollars per month”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“if you were coming from electric resistance, if you're coming from propane”
A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“the biggest savings will come if you switch from fuel oil, propane, or electricity as your main source of heat.”
3 ways heat pumps save you money (homes.rewiringamerica.org)“systems that run on fuel oil, propane, or traditional electric resistance (like baseboard heat or electric furnaces) will save closer to $1,000 per year”
Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“The group estimates families abandoning fuel oil or propane could save closer to $1,000 annually.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“Households heated with propane and electric resistance see the largest annual bill savings ($930 and $1,110, respectively) with all-electric heat pumps.”
What's the true cost of a heat pump? (Grist)“if your home is heated by pretty much anything that's not natural gas, you can expect to save between $800 to $1,200 a year”
Which home energy upgrades will save you money? We did the math. (Washington Post)“homeowners could save money switching from fuel oil, which is relatively expensive, but not from gas”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“if you're using oil or propane it's a no-brainer”
Very likely right AI guessNREL and other modelling find the largest bill savings for homes switching from oil, propane or resistance, and the smallest for gas.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 393-414Median bill savings of $300-$650/yr for electric, oil and propane homes with AC compare with -$70 to $380/yr for gas homes with AC.
Leans right Edwards 2024, inequities in heat pump bill savings lines 296-299Edwards finds the primary heating fuel is a key driver: bill savings are highest where homes now heat with electricity or fuels other than gas.
Leans partly right Deetjen 2021, private economics of US residential heat pumps lines 653-665Counting capital cost, resistance and propane homes usually gain, but oil-heated homes usually take a private loss (65% are in cold climates), so oil is not among the best cases.
Leans right RMI 2018, the economics of electrifying buildings lines 862-865RMI concludes that electrification has the greatest immediate cost and carbon benefit for oil and propane customers.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1184-1205Savings were highest against electric resistance, and the evaluators recommend targeting resistance-heated and propane-heated homes (always cheaper there) and, with caveats, oil homes; against gas there were essentially no running-cost savings.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2700-2706LBNL: the large energy cost reductions in electrification projects were most likely in homes with high pre-retrofit bills, such as those heating with propane or fuel oil.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1267-1273UK households that previously used electric heating saw electricity use fall after a heat pump, while gas-boiler households paid slightly more to run one, which fits the claim for resistance heat; oil and propane are not analysed.

Oversized or poorly installed heat pumps cost more to run and deliver less comfort

Leans right

Field studies link poor sizing, charge, airflow and commissioning to substantially lower measured efficiency.

· denied 0 ·

Asserts (15)Denies (0)Verdicts (3)

“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“the system is going to be way oversized for the house and short cycle in cooling season”
Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“usually a poorly designed system that's been installed on the cheap will cost more to run”
Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“The difference is how it's designed and how it's set up.”
Real Heat Pump Running Costs: A Full Year of Data From 5 Real Homes (Lloyd's Gas & Renewables)“It's because the installers who have put them in are bad.”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“it's a mismatched installation being asked to do a harder job than it's suited for”
Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“Your power consumption is going to be greater. You're not going to be comfortable”
Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) (Electric Vehicle Man)“someone doing a bad install it will cost you a lot of money and that is what is ruining the heat pump reputation”
I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“Equipment that is oversized won't run efficiently, and will likely cause a short cycling, poor humidity control, and a waste of energy.”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“in cases where the units are poorly matched to the size of the house or apartment or the demands of a New England winter”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“an oversized unit will cost more, and if it isn’t a variable-speed model, it will cycle on and off more often than it should.”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“that can be the difference between a system working well, troublefree for years, or you having repeated issues and repeated service calls”
Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“If the refrigerant charge is not right, that can severely impact the operational efficiency of the heat pump”
Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“Heat pumps incredibly unforgiving. They need to be commissioned correctly.”
The TRUE Payback Time for Heat Pumps (Heat Geek)“poor heat pump installations will cost 25 more than an old inefficient boiler”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“we don't oversize it because that actually drives down efficiency if it's oversized too much and cost too much to buy”
Very likely right AI guessField studies link poor sizing, charge, airflow and commissioning to substantially lower measured efficiency.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3049-3066Units from one contractor with sloppy installs (up to 30 ft of excess coiled line set) ran 0.5-1.0 lower in COP at all temperatures, which rated efficiency cannot explain; the report adds that cooling oversizing of variable-speed units should not appreciably hurt efficiency.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 188-193Site 8, undersized because of an inefficient distribution system, relied on resistance heat for about 20% of the load and ran it after every defrost, significantly lowering performance; oversizing was not the problem seen in this sample.

A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates

Leans partly right

With a well-set changeover temperature dual fuel can beat either fuel alone, but the saving over gas alone is small where gas is cheap and it needs two systems.

· ·

Asserts (12)Denies (1)Verdicts (5)

Dual Fuel HVAC | This Old House (This Old House)“homeowner can decide based on the cost of fuel whether they want to go with gas or heat pump.”
What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“This can be a very cost-effective strategy, especially in areas with high electricity rates and cheaper natural gas.”
Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“these are an excellent choice in climates like Colorado”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“why would you not also want it to be a heat pump some days of the year it's going to cost you less”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“for dual fuel it's going to be closer to $5,000”
Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“you can actually run whatever is most efficient or cheapest to run in a given year in terms of how you stage your equipment”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“often times you will find yourself opting for a dual fuel system just for both comfort and efficiency sake because they are more efficient.”
Does a Heat Pump Actually Save Money? (EnergySage)“a hybrid system that automatically switches to the cheaper fuel at that crossover point can lower your annual energy costs.”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“Run the heat pump when it's cheaper than gas. Switch to the furnace when gas is cheaper than backup strips.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“This approach optimizes operating cost and comfort in cold climates without sacrificing AC efficiency.”
Cold Climate Heat Pumps: Everything You Need to Know - Trane® (Trane Residential)“on those extremely cold days, the furnace takes over to help ensure maximum comfort and maximum heating efficiency.”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“save money in the long run as that heat pump runs in the warmer weather and you switch over to your furnace”
DENIES Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“the operating cost delta is not worth the complication and cost of dealing with gas”
Probably partly right AI guessWith a well-set changeover temperature dual fuel can beat either fuel alone, but the saving over gas alone is small where gas is cheap and it needs two systems.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1142-1150Lifetime-cost model: in Toronto a heat pump with gas backup is cheapest for nearly all households, and in Edmonton for 1940 and 1980 detached and townhouses, but gas with AC wins other Edmonton cases; this is lifetime cost including equipment, not running cost alone.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3436-3459Switching between heat pump and fuel at the crossover temperature is cheapest in principle, but at 2016 prices the gas crossover was above 70 F for the measured units, so pairing with gas saved nothing; only a modelled HSPF-13 unit (28-40 F crossover) would beat gas alone.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 730-732Hybrid heat pumps with fossil backup are said to mitigate bill increases without necessarily raising upfront cost, but they were not analysed.
Leans partly right Deetjen 2021, private economics of US residential heat pumps lines 545-547The authors note private economics might improve if supplemental heat came from gas rather than resistance, but they do not model it.

Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills

Leans partly right

Auxiliary heat runtime generally rose in colder bins and heavy use cut system COP over 30% at two sites, but the heavy users were undersized or faulty while six sites used little auxiliary heat.

· ·

Asserts (10)Denies (2)Verdicts (6)

What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“their customers are getting hit with electric bills that they never saw coming.”
Heat Pumps: the Future of Home Heating (Technology Connections)“That’s often electric resistive heating which will always work but needs a ton of energy to do so.”
Why Heat Pumps are now leaving people COLD (Silver Cymbal)“when the temperature goes below about 30° the efficiency drops way down that means your electric bill is going to begin to Skyrocket”
Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“there's a backup resistive heater which is essentially a 10,000 watt heater simple mechanism not efficient”
Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association (American Gas Association)“often relying on less efficient backup sources of heating to make up the difference.”
The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“one of their biggest drawbacks: electric resistance heat to supplement the heat pump at low temperatures. Yes, most heat pumps need supplemental heat.”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“They'll also absolutely destroy your electric bill.”
Electric bill shock! How to avoid 'emergency heat' costs (WSPA 7News)“THEY SAY THAT POWER KICKS IN WHEN TEMPERATURES DIP BELOW 40 TO 35”
Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold (Across New Hampshire, NH Patch)“most households that adopt heat pumps in colder regions still rely on a backup heating source”
Top 3 Heat Pump ISSUES in Winter! (HVAC Guide for Homeowners)“a lot of folks were relying on their backup heat sources in some cases those days haven't ended”
DENIES Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“in many places they just aren’t. Heck, they’re barely required here in the frozen tundra of Illinois.”
DENIES Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“out of 365 days a year, there’s four to seven days of temperatures that force the backup heating system to kick on”
Probably right AI guessField studies in cold regions show strip heat use during cold snaps drives up winter electricity bills, especially with poor controls.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2150-2157Auxiliary heat runtime generally rose in colder bins and heavy use cut system COP over 30% at two sites, but the heavy users were undersized or faulty while six sites used little auxiliary heat.
Leans partly right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 425-435In all-electric systems the booster resistance heat ran at COP 1 below about 30F, but because the heat pump was prioritized the system COP stayed above 1.0 even at -7F, so backup use dented rather than erased efficiency.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1169-1193Auxiliary resistance heat's median share of heating energy rose from 0% in mild bins to about 11% at 5 F and higher below, and was on 25% of the time at -10 to 0 F; the report says auxiliary heat is less efficient and usually costs more (bills not measured).
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 942-946In Minnesota a high-efficiency heat pump sized for the heating load saves a median $182/yr, but sized for cooling it raises bills $96/yr through more resistance backup; reliance and the bill hit depend on sizing, not cold-climate units as such.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1153-1158In Edmonton's cold climate the model finds heat pumps less efficient and more reliant on the backup system, which together with cheap gas makes all-electric heat pumps less cost-competitive; how often backup runs is not reported.

Heat pumps need more maintenance or repairs than gas furnaces

Leans wrong

Seven homeowners needed contractor visits, mostly minor control, sensor or condensate issues fixed in one visit, and the team judged this not atypical compared with their previous systems; the units were prototypes and the sample was small.

· ·

Asserts (3)Denies (9)Verdicts (2)

AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“heat pumps need an additional maintenance checkup before the start of the cold weather season”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“heat pumps may require more maintenance than a standard air conditioner but this is because they have more moving Parts”
The TRUE Payback Time for Heat Pumps (Heat Geek)“roughly 100 to 300 pounds plus v80 for a heat pump service”
DENIES How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“Turns out that the cost of maintaining my geothermal system is basically the same as the natural gas HVAC system”
DENIES Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“Heat pumps require less professional maintenance than combustion systems”
DENIES What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“just like boilers your heat pump will need to be serviced annually”
DENIES A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“Heat pumps also require less maintenance than combustion heating systems, which means lower repair and maintenance costs.”
DENIES 3 ways heat pumps save you money (homes.rewiringamerica.org)“plus utility bill savings and lower maintenance costs”
DENIES Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“require less upkeep since they do not burn fossil fuels”
DENIES Heat Pumps | Mass Save (Mass Save)“Heat pumps require minimal maintenance and can eliminate the hassle of scheduling fuel deliveries.”
DENIES I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“The servicing costs on a heat pump are significantly less.”
DENIES Why is my electric Bill so High!!! Mitsubishi Mini Split Hyper Heat Review Part 4. Feb 2020 Bill (J-Mart)“I have not had to clean them since we purchased these in November”
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1837-1849Seven homeowners needed contractor visits, mostly minor control, sensor or condensate issues fixed in one visit, and the team judged this not atypical compared with their previous systems; the units were prototypes and the sample was small.
Unknown AI guessHeat pumps run year-round and have refrigerant circuits while furnaces have combustion parts; there is little independent data comparing repair rates.

Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source

Leans right

RMI notes that ground-source heat pumps use less energy on the coldest days because ground temperature stays moderate, but have historically cost significantly more than air-source because of drilling.

· denied 0 ·

Asserts (11)Denies (0)Verdicts (5)

Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“their problem is the high upfront cost”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“a geothermal heat pump is not feasible for the vast majority of people”
How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“the projected yearly operating costs were less than half what a comparable air source system would run in my area.”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“They tend to be more efficient than air source systems, especially in winter, but they are more expensive to install”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“Air-source heat pumps tend to be much cheaper than geothermal ones.”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“Although the upfront cost of a geothermal system might be higher than a conventional HVAC system”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“Geothermal is the most efficient heating and cooling system available. Period. It's also the most expensive to install.”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“geothermal systems command a higher price but deliver lower operating costs”
Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“they're really expensive to put in they're usually 20 to $30,000 more than an air source heat pump”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“the reason geothermal is so much more expensive is because you actually have to drill Loops”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“ground source is really expensive. yeah you're talking tens and tens of thousands.”
Very likely right AI guessGround-source systems reach higher seasonal COPs but loop fields push installed costs to several times an air-source system.
Leans right RMI 2018, the economics of electrifying buildings lines 390-396RMI notes that ground-source heat pumps use less energy on the coldest days because ground temperature stays moderate, but have historically cost significantly more than air-source because of drilling.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 3046-3050LBNL: ground-source heat pumps were the most expensive type, at nearly three times the total system cost of ductless and ducted air-source systems; the report does not test the 'run cheaper' half of the claim.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 914-916Ground-source heat pumps offer greater efficiency and cold-climate performance than air-source but are an even more expensive solution; stated, not analysed.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 394-399Ground-source heat pumps are highly efficient but more complex and expensive to install because of drilling; running costs are not quantified and they are left out of the model.

A federal tax credit for heat pumps is available for installations in 2026

Very likely wrong

IRS fact sheet on the 2025 budget law (OBBB): the 25C home improvement credit is not allowed for property placed in service after December 31, 2025, and the 25D clean energy credit for expenditures after that date, so no federal heat pump credit applies to 2026 installs.

· ·

Asserts (1)Denies (10)Verdicts (3)

Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“technically these heat pump tax credits based on the bill that was signed are available through 2033”
DENIES Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“Set that against what died in December. $2,000 a year for a heat pump”
DENIES Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“our president’s “Big Beautiful Bill” put an end to several federal tax credits in 2025.”
DENIES Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“which sunseted the credits much earlier on December 31st, 2025”
DENIES Heat pumps have so far withstood the death of federal tax credits (Canary Media)“The 25C tax credit for heat pumps, which shaved up to $2,000 off the price tag, expired at the end of 2025”
DENIES Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“those tax credits expired at the end of 2025, after Congress rolled back incentives for home energy-efficiency improvements.”
DENIES Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“Heat pumps installed in 2026 or later do not qualify.”
DENIES 25C Heat Pump Federal Tax Credits: A Guide (homes.rewiringamerica.org)“heat pump purchases or installations completed after Dec. 31, 2025 are not eligible for the 25C tax incentive.”
DENIES FAQs for modification of sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, AND 179D under Public Law 119-21, 139 Stat. 72 (July 4, 2025), commonly known as the One, Big, Beautiful Bill (OBBB) | Internal Revenue Service (irs.gov)“The credit will not be allowed for any property placed in service after December 31, 2025.”
DENIES Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“No federal 25C credit for heat pumps placed in service after December 31, 2025.”
DENIES Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“the tax credit for heat pumps expired, but the rebate program for heat pumps survived”
Almost certainly wrong AI guessThe 25C credit was terminated for property placed in service after December 31, 2025 by the July 2025 budget law.
Very likely wrong IRS 2025, end of the 25C and 25D credits lines 25-32IRS fact sheet on the 2025 budget law (OBBB): the 25C home improvement credit is not allowed for property placed in service after December 31, 2025, and the 25D clean energy credit for expenditures after that date, so no federal heat pump credit applies to 2026 installs.
Very likely wrong IRS, the 25C home improvement credit lines 4-6IRS 25C page: the credit applies to improvements made through December 31, 2025; nothing is available for 2026 installs.

Heat pumps are being used successfully in cold countries like Norway and Canada

Leans right

Heat pumps heat a large share of homes in Norway, Sweden and Finland and are spreading in Canada and Maine.

· denied 0 ·

Asserts (10)Denies (0)Verdicts (4)

The Trouble With Heat Pumps (Sabine Hossenfelder)“Sweden, Norway and Finland lead the way in adoption with 40 percent of households using heat pumps already.”
The Truth About HVAC Scams & Heat Pump Hype | Handy Bros. CEO Sets the Record Straight (Handy Bros. Home Comfort)“don't think that they're suited for Canada when that's not at all the case.”
Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“this is the second winter that I've had it and it's basically worked”
Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) (Electric Vehicle Man)“they've used them for decades in much colder countries such as Scandinavian countries”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“In all three countries, there are now more than 40 heat pumps per 100 households, more than in any other country in the world.”
Why aren't we all using heat pumps? (Simon Clark)“just ask Scandinavians in Norway Finland and Sweden”
What's the true cost of a heat pump? (Grist)“That state now sells more heat pumps per capita than even the heat pump crazy Scandinavian countries.”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“they're most popular in like scandinavia etc. they're designed to go down to minus 15, minus 20.”
Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“We have a harsh winter that goes down to -30° -40° C, and they're they're fantastic to heat up the homes.”
Heat pump in Canada - Does it work long term? (Your Electric Neighbour)“I've owned my heat pump in Canada uh for two and a half Winters now”
Very likely right AI guessHeat pumps heat a large share of homes in Norway, Sweden and Finland and are spreading in Canada and Maine.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 528-541Norway leads the world in heat pump penetration, with Finland and Sweden close behind and studies confirming real-world performance; elsewhere the report notes heat pumps heat 21 to 32% of homes in Canada's Maritime provinces.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 126-128Air-to-air heat pumps are the dominant heat pump type in Nordic and Baltic countries (Canada is not mentioned).
Leans right Edwards 2024, inequities in heat pump bill savings lines 70-71Edwards reports high heat pump penetration in Norway, Finland and Sweden; Canada is not covered and success is inferred from adoption.

Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost

Leans partly right

Wholesale heat pumps cost only $200-$500 more than equivalent ACs, but heat pumps sized to fully electrify heating often cost more to install than AC plus furnace because of larger capacity, wiring and panel upgrades.

· denied 0 ·

Asserts (9)Denies (0)Verdicts (4)

Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“If you’re installing an air conditioner, you might as well spend the extra dollars and make it a heat pump.”
Heat Pumps: the Future of Home Heating (Technology Connections)“all it really takes is a reversing valve and a few other particulars to make that happen, I see it as a no-brainer.”
How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“there should not be a significant price delta between a standard air conditioner”
How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“So it brings that price up just a little bit.”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“why spend the $50 on a reversing valve when gas is cheap?”
Need air conditioning? Consider the heat pump. (Canary Media)“it costs between $900 and $1,900 more to replace a broken central AC with a heat pump instead of a conventional AC”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“it may make sense to pay a little extra for a heat pump and keep your existing heating system as a backup”
Does a Heat Pump Actually Save Money? (EnergySage)“equipment and installation costs are lower—often barely more than a central AC alone.”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“they still have a cost premium relative to AC-only replacements — typically around $1,000 to $2,000”
Probably right AI guessA heat pump of the same capacity typically costs modestly more than an AC, and its heating displaces fuel or resistance heat.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 185-191Wholesale heat pumps cost only $200-$500 more than equivalent ACs, but heat pumps sized to fully electrify heating often cost more to install than AC plus furnace because of larger capacity, wiring and panel upgrades.
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 1838-1854Edwards' national installed-cost medians put a heat pump at $6,185 against $4,684 for a central AC of the same 36,000 BTU/h size, so it adds heating for about $1,500 (roughly 30%) more, which is modest but not trivial.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1360-1391Database costs put an efficient heat pump only about $370 above an equally efficient central AC ($5,550 vs $5,180), adding heating for little extra cost.

Heat pumps need a home to be well insulated to work economically

Leans wrong

The UK Electrification of Heat trial installed heat pumps in every housing type, including old, poorly insulated homes, with similar efficiency; insulation lowers cost but is not a prerequisite.

· ·

Asserts (3)Denies (6)Verdicts (6)

The Trouble With Heat Pumps (Sabine Hossenfelder)“heat pumps, at least so far, don't work well in old houses because they just don't get warm enough”
Why Heat Pumps are now leaving people COLD (Silver Cymbal)“if you've got a house that's 15 years or older you are definitely going to experience problems”
This is Why Heat Pumps May NOT Be The Future (Skill Builder)“They don't work well enough in our housing stock.”
DENIES 3 years living with a heat pump - stats and my main take-away (Tom Bray)“this is not a particularly well insulated home”
DENIES Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) (Electric Vehicle Man)“I haven't hyper insulated anything it's the same insulation as we had with the gas boiler”
DENIES Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“Heat pumps can work in any building if sized, designed and installed correctly.”
DENIES A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“If your home is poorly insulated then you probably spend a lot of money to heat and/or cool your home. And that means more opportunity”
DENIES Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“So, we haven't uberinsulate the house. You don't need to.”
DENIES Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“they will literally work in any building provided you have double glazing, that's it.”
Leans wrong AI guessThe UK Electrification of Heat trial installed heat pumps in every housing type, including old, poorly insulated homes, with similar efficiency; insulation lowers cost but is not a prerequisite.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 522-529Envelope upgrades only slightly raise the share with positive NPV in cold climates and generally lower it in warmer ones; high-efficiency units avoid bill increases in 95% of homes without them.
Leans partly right RMI 2018, the economics of electrifying buildings lines 972-977RMI says electric space heating is less suitable in inefficient buildings, especially in cold climates, yet its leaky retrofit homes in mild Houston and Oakland still had lower heat pump energy costs.
Leans wrong CEE 2017, cold-climate heat pumps in Minnesota lines 1271-1299Modeled savings depended mostly on house type and were largest in leaky/large homes (about $1,033/yr vs an 80% furnace in Duluth versus about $111 for a passive house); the table is garbled in extraction.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 1931-1945LBNL: the cheapest high-savings approach paired heat pumps with only typical weatherization (attic, cavity fill, air sealing), while aggressive envelope upgrades cost double for modest marginal energy cost savings; basic weatherization helps, deep insulation was not needed.
Unknown Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1235-1244The UK study found no interaction between EPC rating and the heat pump's electricity increase, but because the grant required loft and cavity insulation, few homes in the sample were poorly insulated, so it cannot test the claim.

State and utility rebates can cover a large share of a heat pump's cost

Leans partly right

Some states and utilities pay thousands of dollars, but programs vary widely and many areas offer little.

· denied 0 ·

Asserts (9)Denies (0)Verdicts (3)

How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“However, federal, state, and utility rebates can dramatically reduce those costs”
Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“the EPA funded a program that pays up to $8,500 to residents who want to make the switch to heat pumps”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“After a standard Mass Save rebate and federal tax credit, the net average price dropped to $10,000.”
Will a heat pump save you money? It depends (Canary Media)“Massachusetts issues rebates as massive as $16,000 for income-qualified households.”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“the state of Colorado has a $1,500 tax credit also available for anyone that installs a heat pump.”
Why aren't we all using heat pumps? (Simon Clark)“your local government will give you thousands of dollars in rebates to do so”
Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“the rebates are still $2,250 per ton at 5° performance for the heat pump.”
Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“provides $5,000 to $12,000 for air-source heat pumps in residential properties of 1–4 units.”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“huge incentives from Massave up to $10,000 for heat pumps”
Probably partly right AI guessSome states and utilities pay thousands of dollars, but programs vary widely and many areas offer little.
Leans right Mass Save 2026, air-source heat pump rebates lines 98-109Mass Save example: the whole-home rebate of $8,500 covers about 39% of the $22,000 average install, and the income-based $16,000 covers about 73%; this is one generous utility program, not a national picture.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 2532-2536LBNL: 71% of projects got rebates, with a median of $1,327 (21% of gross cost, mean 30%); electrification programs such as MA DOER Home MVP gave higher shares (37%), so rebates covered a meaningful but usually minority share.

Installing a heat pump can require costly electrical panel or service upgrades

Leans right

Across 21 installs, 38% needed a new panel, 24% a service line upgrade and 90% new breakers for auxiliary heat; electrical upgrades alone cost $3,750-$8,970 in labour and materials.

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Asserts (7)Denies (2)Verdicts (7)

Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“you need to upgrade your entire electrical panel”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“you're going to need to add a couple Breakers at the pan panel and run new electrical wiring to the indoor unit”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“that's a big Power draw and you need to run a new circuit to it in almost all cases”
AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“a heat pump installation can also cost more if your home doesn't have the proper electrical panel upgrades to support it”
Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association (American Gas Association)“you may also need to pay to have it rewired for additional electrical capacity”
Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“may advise hiring an electrician to upgrade to the modern standard of 200 amps. That work could cost a couple of thousand dollars.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Homes with 100A service may need upgrades, though smart panels and load-shedding devices can sometimes avoid a full service replacement.”
DENIES Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“Except, uh, they do. Almost always.”
DENIES Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“Many folks would consider that an insurmountable barrier to electrification”
Probably right AI guessA substantial minority of homes, especially with 100A service, need panel or service work, though right-sizing and load management often avoid it.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1953-1976Across 21 installs, 38% needed a new panel, 24% a service line upgrade and 90% new breakers for auxiliary heat; electrical upgrades alone cost $3,750-$8,970 in labour and materials.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 849-859Panel, service wire, transformer and pole upgrades are estimated at $2,000-$30,000; only 50-60% of homes already have panels above 150 amps.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 3676-3681LBNL: electrification projects are often burdened by panel upgrades where amperage is insufficient; a typical 200 A panel upgrade costs $1,954, plus dedicated circuits, and many homes with 50- or 100-amp service cannot support the new loads.
Leans right RMI 2018, the economics of electrifying buildings lines 135-139RMI notes that many homes need additional electrical work to accommodate heat pumps.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 770-773The model adds an electrical panel upgrade cost (set at $3,400 in Table 2) for 1940 and 1980 homes where one is likely needed, including all heat-pump-with-electric-backup scenarios.
Leans right Edwards 2024, inequities in heat pump bill savings lines 885-888Edwards lists electrical panel and other home upgrades among the upfront costs that can block heat pump adoption.

Removing the gas connection saves its fixed monthly charge

Probably right

Homes that convert all gas end uses and shut off service no longer pay the fixed charge (median $11.25/month in 2015, up to $34-$65 in Chicago and NYC); dropping it raises gas homes with positive savings from 32-92% to 49-97%.

· denied 0 ·

Asserts (9)Denies (0)Verdicts (6)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“if you remove your gas meter, then you won't have to pay standing charges”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“even if you use none you're typically being charged 25 to 30 bucks a month just to have that gas line”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“you'll no longer have to pay a standing charge which can save you 115 lbs of year”
Will a heat pump save you money? It depends (Canary Media)“a sure way consumers can save on their bills is if they can rid themselves of their gas connection entirely”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“households can save £110 per year by disconnecting from the gas grid and no longer paying the gas “standing charge”.”
The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“get gas bills in the summer showing no gas consumption and an amount due of $30 or so.”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“my gas meter fee is $25/month so $300/year”
Heat Pump vs Gas Furnace Running Cost by State 2026 (jouleio.com)“Dropping gas entirely removes the gas utility's fixed monthly customer charge, which the per-Btu table ignores.”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“we can then get rid of gas entirely from the house, which means that's anotherundredish pounds a year standing charge”
Very likely right AI guessFully disconnecting gas removes the fixed customer or standing charge, typically worth around £100 a year in the UK and $100-300 in the US.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 580-586Homes that convert all gas end uses and shut off service no longer pay the fixed charge (median $11.25/month in 2015, up to $34-$65 in Chicago and NYC); dropping it raises gas homes with positive savings from 32-92% to 49-97%.
Probably right RMI 2018, the economics of electrifying buildings lines 978-982RMI notes that many gas bills carry a fixed monthly service charge ($33/month in its Chicago scenario), which only full home electrification removes.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1856-1858UK customers pay about £100/yr for a mains gas connection, and a heat pump that allows full disconnection removes that charge.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1343-1348A Montreal household that disconnects from gas would save over $4,000 in fixed gas fees over the system's life ($228/yr over 18 years).
Leans right EIA, state residential electricity and gas prices lines 126-127Average gas prices include fixed customer charges: a household keeping its gas connection keeps paying it, one that disconnects saves it.

An air conditioner is a heat pump that only runs in one direction

Leans right

RMI describes heat pumps as working like air conditioners in summer and running in reverse in winter, so an air conditioner is the one-direction case.

· denied 0 ·

Asserts (8)Denies (0)Verdicts (6)

“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“an air source heat pump is just an air conditioner with a reversing valve”
Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! (The HVAC Veteran)“Cuz they they do exactly what an air conditioner does.”
Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“Because, once again, air conditioners ARE heat pumps!”
Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“A heat pump is essentially a modified air conditioner that is able to operate in reverse.”
Heat Pumps: the Future of Home Heating (Technology Connections)“And the thing is, air conditioners ARE heat pumps.”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“They’re just air conditioners equipped with an extra valve so they can operate in reverse to produce heat!”
Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“all a heat pump is is an air conditioner with a reversing valve”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“remember a heat pump is just an air conditioner with a reversing valve so a heat pump is also your air conditioner”
Almost certainly right AI guessAn air-source heat pump is a vapor-compression air conditioner with a reversing valve and defrost controls.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 104-106The paper describes heat pumps as reversible air conditioners that reverse refrigerant flow in winter to move outdoor heat inside.
Leans right RMI 2018, the economics of electrifying buildings lines 349-355RMI describes heat pumps as working like air conditioners in summer and running in reverse in winter, so an air conditioner is the one-direction case.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1653-1655The paper refers to air conditioners as one-way heat pumps, contrasting them with two-way heat pumps sized for heating.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 39-49Describes the heat pump in cooling mode as running the cycle in the opposite direction, removing indoor heat like a traditional air conditioner; a descriptive statement, not a measurement.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 366-367Describes heat pumps as fully reversible, working the same way as a cooler in warm weather by removing heat from indoors, which matches the idea of an air conditioner that also runs in reverse.

Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather

Probably right

Defrost cut ccASHP COP at site 2 (e.g. 1.86 to 1.65 at 10-20F), drove backup energy use between the 10F changeover and 40F, and eliminating it would have raised annual energy savings by 8.3%.

· denied 0 ·

Asserts (8)Denies (0)Verdicts (6)

Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“at very low temperatures, frost can accumulate over the outdoor coil, which can reduce efficiency”
Heat Pumps: the Future of Home Heating (Technology Connections)“On cold, humid days it has to defrost rather frequently, limiting its output, and reducing efficiency.”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“at very low temperatures, frost can accumulate over the exterior coil, which further reduces efficiency.”
Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“it would essentially be air conditioning your house for about 5 minutes and would melt all the frost off the outdoor unit”
Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“when this happens you won't get heat coming through your vents during the defrost cycle”
How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“whenever it defrosts, that basically means heating up the outside coils using electricity, and that is electricity that isn't used to heat up the house”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“Heat pumps spend most of the time in defrost near freezing temperature.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“In freezing weather, outdoor coils accumulate frost. Heat pumps periodically reverse to melt frost, briefly pausing heating.”
Very likely right AI guessFrost on the outdoor coil and reverse-cycle defrost both cut delivered heat, with the largest losses near freezing in humid air.
Probably right CEE 2017, cold-climate heat pumps in Minnesota lines 1484-1519Defrost cut ccASHP COP at site 2 (e.g. 1.86 to 1.65 at 10-20F), drove backup energy use between the 10F changeover and 40F, and eliminating it would have raised annual energy savings by 8.3%.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2363-2372Defrost consumed over 20% of compressor heating energy at Sites 5, 7, 8 and 11; defrost cycles peaked at 20-40F wet-bulb, since cold air holds little moisture.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1249-1310Frost on the outdoor coil in cold humid air cuts heat exchange, and the reverse-cycle defrost pulls heat from the house and drops supply air temperature; defrost took a median 5-8% of energy at 5-35 F and up to 16% of the time at one site.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 346-352Frost on the outdoor coil restricts airflow, and defrost cycles reverse the refrigeration cycle, using energy, reducing heat pump availability and increasing auxiliary heating; the humidity dependence is not tested here.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3320-3329Site conditions caused long defrost periods that lowered efficiency, and at one windy oceanfront site prolonged defrost cycles pulled heat out of the house; this is anecdotal plus the evaluators' general observation.

Switching from gas to a heat pump raises the household's energy bills

Leans partly right

UK households switching from gas boilers see running costs about £190/yr higher on a standard tariff (about £83 after dropping the gas standing charge), so bills do rise modestly; but the same paper finds a heat pump time-of-use tariff saves about £318/yr, enough to reverse the rise.

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Asserts (7)Denies (1)Verdicts (7)

This is Why Heat Pumps May NOT Be The Future (Skill Builder)“running a heat pump is roughly three times more expensive than running a gas boiler.”
Massachusetts homeowners say state is ignoring cost in push toward all electric heat (WCVB Channel 5 Boston)“THEY SAY IT'S CERTAINLY EFFICIENT AT BURNING THROUGH THEIR MONEY.”
Heat Pump Reality Check - Gas Boiler Wins on Running Costs (Jonathan Tracey)“In the coldest month of the year, the heat pump cost about £42 more to run for one month than it does on gas.”
Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe (BostonGlobe.com)“homeowners switching from natural gas boilers to heat pumps could see an increase in operating costs”
New winter rates saved at least $37M for Massachusetts heat-pump… (Canary Media)“72% of current natural gas customers would save money by switching to a heat pump if discounted rates were adopted, up from 27%”
Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips (HouseBarons)“it's more expensive to run electric than gas but not dramatically so”
Which home energy upgrades will save you money? We did the math. (Washington Post)“if this home was subject to Chicago’s weather and prices of utilities, switching to a minimum efficiency heat pump could actually lose money”
DENIES Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“well-designed systems can save UK households hundreds of pounds a year, even though electricity is more expensive than gas.”
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1863UK households switching from gas boilers see running costs about £190/yr higher on a standard tariff (about £83 after dropping the gas standing charge), so bills do rise modestly; but the same paper finds a heat pump time-of-use tariff saves about £318/yr, enough to reverse the rise.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 409-415With minimum-efficiency equipment most gas homes with AC see higher bills (only 38% positive), but with cold-climate high-efficiency units 99% see lower bills.
Leans partly right RMI 2018, the economics of electrifying buildings lines 158-161RMI finds that switching from gas raises energy costs in cold Chicago and Providence but lowers them (though not enough to repay capital) in Houston and Oakland, so it holds only in colder climates.
Leans partly right AI guessIt depends on the price ratio and efficiency: on UK standard tariffs bills often rise, while US modelling finds most homes save with efficient units and gas-heated homes save least.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 2700-2710LBNL: among 273 electrification projects, some raised annual energy costs (by up to $1,000) where electricity was expensive, while many cut costs substantially, mostly where oil or propane was replaced; so higher bills happen in some cases, not as a rule.
Leans wrong Canadian Climate Institute 2023, heat pumps pay off lines 1591-1597The report says energy bills tend to be lower in homes with heat pumps, based on its Canadian modelling where heat pumps are the lowest lifetime-cost option in most cities; it is a model, and Edmonton is an exception.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1658-1691Billing was not analysed, but several participants who had gas cited higher utility bills and one would not recommend a cold-climate heat pump to neighbours with gas; respondents were manufacturer employees or affiliates, and others reported lower bills.

Ducted heat pumps can often use a home's existing ductwork

Leans right

Ducted heat pumps commonly replace a central AC condenser and coil on existing ducts, though some duct systems need changes.

· denied 0 ·

Asserts (7)Denies (0)Verdicts (4)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“homes with central air conditioning are basically already set.”
How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“You've already got the inner workings, the uh lifeblood, the duct work, the line sets”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“they’re fine for the heat pump that they *actually* need”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“In most places across the States, you can swap your central AC or furnace with an ASHP, no ducts required.”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“you can um just swap that for a heat pump and that will use your existing ducts”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“a ducted heat-pump system can connect to that existing infrastructure “with little or no retrofitting needed,””
What's the true cost of a heat pump? (Grist)“a new air-source heat pump that will fit into existing ducts”
Very likely right AI guessDucted heat pumps commonly replace a central AC condenser and coil on existing ducts, though some duct systems need changes.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 153-161The ducted heat pumps' indoor coils were installed in the homes' existing furnace ductwork, like a traditional AC coil, using the furnace fan to distribute heat.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1957-1972Ducted cold-climate heat pumps replaced furnaces at 21 sites; 71% needed no major duct upgrades (though 76% needed minor ones), so existing ductwork was mostly reused.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 814-819Ducted heat pumps connected to existing duct systems are described as the typical case, with the caveat that existing duct airflow may force undersizing and more backup heat.

Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap

Leans right

The 25D residential clean energy credit covered 30% of ground-source heat pump costs without a dollar cap until it ended after 2025.

· denied 0 ·

Asserts (7)Denies (0)Verdicts (1)

How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“After the federal rebates, the system cost came down to about $54,000.”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“provides homeowners a tax credit of 30% from the total installed cost of the Energy Star rated system”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“a geothermal heat pump qualifies for up to a 30% tax credit of the total purchase price.”
Federal Tax Credits for Energy Efficiency (ENERGY STAR)“a 30 percent income tax credit for clean energy equipment, such as rooftop solar, wind energy, geothermal heat pumps and battery storage”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“you can claim the 25D, uh, credit for 30% off the entire cost of a ground source heat pump installation”
FAQs for modification of sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, AND 179D under Public Law 119-21, 139 Stat. 72 (July 4, 2025), commonly known as the One, Big, Beautiful Bill (OBBB) | Internal Revenue Service (irs.gov)“Residential clean energy credit The credit will not be allowed for any expenditures made after December 31, 2025.”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“the geothermal heat pump credit is actually 30% annually with no annual cap”
Almost certainly right AI guessThe 25D residential clean energy credit covered 30% of ground-source heat pump costs without a dollar cap until it ended after 2025.

A heat pump pays for itself through lower energy bills within a few years

Leans wrong

Even over 16 years, unsubsidized NPV is positive for only 55% (minimum), 41% (medium) and 21% (high-efficiency) of homes, far from a few-year payback for all.

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Asserts (4)Denies (3)Verdicts (8)

Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“the increased cost to convert a gas system to a heat pump could be offset in savings by year five”
I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“$500 a year it take 4 years to pay back the unit.”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“Uh four years. Four years. So, four years you got your money back.”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“that saved us five thousand seven hundred and forty eight dollars which is great considering we only paid forty one hundred dollars”
DENIES 3 years living with a heat pump - stats and my main take-away (Tom Bray)“a simple calculation would suggest around 18 to 25 years”
DENIES 3 ways heat pumps save you money (homes.rewiringamerica.org)“with their energy bill savings, a heat pump will often pay off in about 15 years”
DENIES Which home energy upgrades will save you money? We did the math. (Washington Post)“making the payback period around 48 years”
Probably wrong AI guessAnalyses (NREL, RMI) show payback is long or never for many gas-heated homes; quick payback is limited to oil, propane or resistance homes or with large incentives.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 497-520Even over 16 years, unsubsidized NPV is positive for only 55% (minimum), 41% (medium) and 21% (high-efficiency) of homes, far from a few-year payback for all.
Leans wrong Deetjen 2021, private economics of US residential heat pumps lines 570-574Only 21% of US single-family houses without heat pumps would benefit economically over a 15-year life from replacing their heater with one.
Leans wrong RMI 2018, the economics of electrifying buildings lines 158-161In RMI's gas retrofits, heat pumps either raise energy costs (Chicago, Providence) or save too little to recover the extra capital (Houston, Oakland), so for most gas homes they never pay back at 2018 prices.
Leans partly right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 513-516Payback is 5-6 years only when the existing heating or cooling system has failed; as a pure retrofit it typically exceeds 10 years, so 'a few years' holds only at replacement time.
Leans wrong Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1868-1871For UK households replacing gas boilers, operating costs are higher, not lower, on a standard tariff, leaving a net private cost of about £4,121 over 20 years, so there is no payback from bill savings.
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 290-294Edwards finds 19% of households would face higher bills and 28% no clear change, so a heat pump cannot pay for itself through bills for nearly half of homes.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1488-1492The report says lower heat pump operating costs offset the higher capital cost within a few years (citing Kaufman 2019 and Goody 2014), but its own model shows this depends on region and fails in many Edmonton cases.

A heat pump can be added alongside an existing furnace to cut fuel use

Leans right

Mini-splits added alongside existing heating cut the baseline fuel by about 3.8-4.7 MMBtu per unit in winter 2016 on average, at a cost of about 763 kWh of electricity.

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Asserts (6)Denies (1)Verdicts (5)

Dual Fuel HVAC | This Old House (This Old House)“We found this 92% furnace here, and instead of throwing it away, we said it's got plenty of life left.”
What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“they have the ability to use the old existing heating system if they need to when it gets really cold out”
HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“most of the time you will try to use the heat pump as your only source of heating”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“We still have our gas heating if if we want to turn that on.”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“we do still have an operational boiler in the house that operates when it gets really really cold”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“a hybrid ASHP sized to the cooling load and paired with the existing furnace for supplemental heat (i.e., part-load ASHP) reduces energy bills the most”
DENIES Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“The first year our utility costs (oil and electric) were about $200 less than pre installation. Last year they were actually about the same”
Very likely right AI guessHybrid installs displace most furnace or boiler fuel use in field studies while keeping the old system for cold snaps.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 625-629Mini-splits added alongside existing heating cut the baseline fuel by about 3.8-4.7 MMBtu per unit in winter 2016 on average, at a cost of about 763 kWh of electricity.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 729-755Integrating a ducted ccASHP with the existing furnace proved complicated: it needed a same-brand communicating furnace and a multi-stage fan, which most 80% and older condensing furnaces lack, so the project installed new furnaces.
Leans right Mass Save 2026, air-source heat pump rebates lines 79-83Mass Save offers partial-home rebates to customers who keep an existing boiler or furnace to supplement a new heat pump; the page shows this is a recognized setup but does not measure the fuel savings.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1353-1357Gas backup may be the most attractive option for households whose gas furnace does not yet need replacing, but the fuel saving from adding a heat pump is not quantified.

Heat pumps last about as long as furnaces and air conditioners

Leans partly right

Heat pumps typically last 12-15 years, similar to central ACs but shorter than many gas furnaces.

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Asserts (4)Denies (3)Verdicts (1)

Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“have an average lifespan of 15 to 20 years”
What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“a heat pump can last around 20 years”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“heat pumps can last a couple decades or even longer.”
The TRUE Payback Time for Heat Pumps (Heat Geek)“heat pumps life should be more like 20 years”
DENIES Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“it both Heats and cools so that means it runs year round so it ends up wearing out a little bit faster”
DENIES Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor (GreenBuildingAdvisor)“it wouldn't surprise me if a typical old-school boiler will outlast a typical modern heat pump.”
DENIES HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“Air conditioners and heat pumps typically last 10–15 years, while furnaces often last 15–20 years or more”
Leans partly right AI guessHeat pumps typically last 12-15 years, similar to central ACs but shorter than many gas furnaces.

Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone

Leans right

In RMI's four-city model at 2018 prices, homes with gas heat that only need a new furnace usually pay more over 15 years to electrify than to stay on gas, even when the furnace is being replaced anyway (an advocacy model of a few cities).

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Asserts (6)Denies (0)Verdicts (4)

Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“won't be around long enough for the efficiency savings to pay back the install costs.”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“they're very expensive and they don't suit a lot of people in terms of justifying themselves compared to getting a gas boiler out”
Out of Gas: New York’s Blocked Pipelines Will Hurt Northeast Consumers (Manhattan Institute)“replacing natural gas-fueled equipment with heat pumps has “negative internal rates of return (indicating that customers do not experience any payback”
The TRUE Payback Time for Heat Pumps (Heat Geek)“if you've got a new working boiler the argument for having a heat pump is much much lower”
Which home energy upgrades will save you money? We did the math. (Washington Post)“But installing it would cost around $12,000 after rebates, making the payback period around 48 years.”
Heat pump in Canada - Does it work long term? (Your Electric Neighbour)“if your equipment's working great for you wait till it breaks down and then replace it”
Probably right AI guessWhere gas is cheap the annual saving from switching is small or negative, so the full cost of replacing working equipment seldom pays back.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 647-652Even assuming replacement at end of life, switching from natural gas to a heat pump rarely produces a private benefit, almost never in cold climates; replacing a working furnace would only add cost.
Leans right RMI 2018, the economics of electrifying buildings lines 423-431In RMI's four-city model at 2018 prices, homes with gas heat that only need a new furnace usually pay more over 15 years to electrify than to stay on gas, even when the furnace is being replaced anyway (an advocacy model of a few cities).
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1871In the UK the switch from a gas boiler has a net private cost of about £4,121 over 20 years even after the £7,500 grant, because running costs are higher on a standard tariff, so energy savings never repay the purchase (UK boilers; time-of-use tariffs change this).

Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout

Probably right

As of Feb 2026, the National Housing Trust tracker shows most states' HEAR and HER programs only conditionally approved with no expected launch date (e.g. Alabama, Alaska, Arkansas), and others partly launched or in pilots, three-plus years after the 2022 law.

· denied 0 ·

Asserts (6)Denies (0)Verdicts (2)

Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“12 states and the District of Columbia had launched as of June. 43 states and territories still have none.”
Need air conditioning? Consider the heat pump. (Canary Media)“While some state programs have rolled out after being finalized under the Biden administration, others still awaiting approvals are now stuck in limbo.”
Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“The catch is availability. HEAR rollout has been uneven:”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“their roll out has been extremely slow”
Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“administered by each individual state and they are rolling out across the country throughout 2026.”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“Income-based electrification rebates authorized by federal law are rolling out state by state”
Very likely right AI guessHEAR rebates are run by state energy offices and only a minority of states had launched programs by 2025.
Probably right National Housing Trust 2026, state rebate tracker lines 98-126As of Feb 2026, the National Housing Trust tracker shows most states' HEAR and HER programs only conditionally approved with no expected launch date (e.g. Alabama, Alaska, Arkansas), and others partly launched or in pilots, three-plus years after the 2022 law.

A heat pump cools as efficiently as a comparable central air conditioner

Leans right

A heat pump is the same refrigeration machine as an AC, and inverter models often have higher SEER2 ratings than typical installed ACs.

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Asserts (6)Denies (0)Verdicts (3)

Why Heat Pumps are now leaving people COLD (Silver Cymbal)“they are awesome air conditioners”
How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“a heat pump at its base level is going to be more efficient than the base model air conditioner”
AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“Heat pumps and air conditioners have similar energy efficiency ratings.”
How a Ductless Heat Pump Can Save You Money and Energy | Mitsubishi Electric HVAC US (mitsubishicomfort.com)“A heat pump is an energy-saving air conditioner that simply reverses the flow of refrigerant.”
Heat Pump vs. Air Conditioner: Full Comparison and Breakdown (Yarbrough & Sons Heating, Cooling & Plumbing)“So a heat pump has the exact same function except it can do it both ways.”
Heat pump in Canada - Does it work long term? (Your Electric Neighbour)“cool your house in the summertime way better than your your current um central air conditioners”
Very likely right AI guessA heat pump is the same refrigeration machine as an AC, and inverter models often have higher SEER2 ratings than typical installed ACs.
Leans right RMI 2018, the economics of electrifying buildings lines 455-460RMI's modelled heat pumps cool at SEER 18 against SEER 16 for a new AC, and it says they often cool much more efficiently than existing AC systems (a modelling assumption).
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 374-376Heat pumps can cool as efficiently as central air conditioning and more efficiently than window or portable units (a secondary citation to Carrier and BC Hydro).

Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces

Probably right

Bill savings vary by climate, prices and housing stock across locations, and vary even more between the 5th and 95th percentiles within one location.

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Asserts (6)Denies (0)Verdicts (7)

Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“the savings depend on the location and climate of the installation”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“with some GHPs paying for themselves in as few as three years, and others hitting that point after a decade”
Does a Heat Pump Actually Save Money? (EnergySage)“heat pump payback periods are hard to pin down precisely—and that's not a cop-out.”
What's the true cost of a heat pump? (Grist)“Each house, installer, and climate zone means something a little bit different for heat pumps.”
Which home energy upgrades will save you money? We did the math. (Washington Post)“the difference between the cost of a new heat pump and a new furnace — bringing the payback time closer to eight years”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“it would take a really long time to even equal out on those cost savings because of how cheap natural gas is”
Almost certainly right AI guessModelled paybacks range from a few years to never depending on the fuel replaced, local prices, climate and whether the AC also needed replacing.
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 368-373Bill savings vary by climate, prices and housing stock across locations, and vary even more between the 5th and 95th percentiles within one location.
Probably right Deetjen 2021, private economics of US residential heat pumps lines 646-654Adoption economics vary by grid region, climate, housing and especially baseline heating fuel: gas rarely pays, resistance almost always does.
Leans right Edwards 2024, inequities in heat pump bill savings lines 292-299Edwards finds bill benefits vary across the US, with the primary heating fuel a key driver and climate and energy prices also important.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1376-1408Simple payback ranged from 0.6 years (furnace and AC both failed) to 28.8 years (no failure, versus a condensing furnace), depending on what equipment is replaced and the baseline furnace efficiency.
Leans right RMI 2018, the economics of electrifying buildings lines 150-161RMI's lifetime cost results flip with fuel (propane and oil favour heat pumps), with whether an AC is replaced too, with new build versus retrofit, and with city climate and prices.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 139-147Cost-competitiveness varies most with regional energy prices and climate: heat pumps win even under worst-case assumptions in Montreal, Halifax and Vancouver but not in cold, cheap-gas Edmonton; the replaced equipment is not varied.

A heat pump costs about the same as a central air conditioner of the same capacity

Leans partly right

Standard heat pumps usually cost modestly more than a same-size AC, while cold-climate variable-speed models cost several thousand more.

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Asserts (3)Denies (3)Verdicts (4)

Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“Because the heat pump part IS THE SAME THING as an AC replacement.”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“heat pumps are on average five percent more expensive than traditional air conditioners”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“Air conditioners cost $4,000–$8,000 installed, heat pumps cost $4,200–$7,600”
DENIES Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! (The HVAC Veteran)“on some units they can be as high as 3, 4,000 dollars more than an air conditioner.”
DENIES Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“it's true that a heat pump is more expensive than a standard air conditioner”
DENIES AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“air source heat pumps tend to cost thousands of dollars more than air conditioners”
Leans partly right AI guessStandard heat pumps usually cost modestly more than a same-size AC, while cold-climate variable-speed models cost several thousand more.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 185-191Wholesale prices are only $200-$500 more than equivalent ACs, but installed heat pumps sized for heating often cost more because of larger capacity and electrical work.
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 1838-1854Edwards' national installed-cost medians at the same 36,000 BTU/h size are $6,185 for a heat pump and $4,684 for a central AC, about 30% apart.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1360-1391NREL cost database: heat pump $2,994 base / $5,550 efficient versus central AC $3,164 / $5,180; the report says heat pumps cost very similar to split AC of the same SEER.

The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation

Probably right

The UK Boiler Upgrade Scheme started in May 2022 at £5,000 per air-source heat pump and rose to £7,500 from 23 October 2023.

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Asserts (6)Denies (0)Verdicts (2)

Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) (Heatable)“you should be able to get a grant for 7 and 1/2 thousand pounds towards the cost of moving away from a gas boiler”
3 years living with a heat pump - stats and my main take-away (Tom Bray)“this would usually come with the Grant from the boilet upgrade scheme”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“in the UK there's currently a grant which is 7 and 1/2 thousand pounds if you go for an air to water solution.”
The TRUE Payback Time for Heat Pumps (Heat Geek)“currently we have the bus or boiler upgrade screen which brings down your return investment by another 5k”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“the government opening up access to the bus grant to those people considering airto-air heat pumps”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“everyone is entitled to seven and a half thousand pounds to have one of these installed”
Very likely right AI guessThe Boiler Upgrade Scheme has paid £7,500 for air-source heat pumps in England and Wales since October 2023, subject to eligibility.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 325-327The UK Boiler Upgrade Scheme started in May 2022 at £5,000 per air-source heat pump and rose to £7,500 from 23 October 2023.

A heat pump still uses less energy than resistance heat even in very cold weather

Probably right

In the 2016 winter field data, mini-splits averaged COP 1.5 at -10 to 0 F, giving about 50% more heat per kWh than resistance heat; some non-cold-climate units got close to COP 1.0 in very cold hours, but those hours were few.

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Asserts (4)Denies (1)Verdicts (7)

What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“a cold climate heat pump at 0° will still be delivering a coefficient of performance of two or higher”
Major Advances with Heat Pumps in the Extreme Cold (Undecided with Matt Ferrell)“cold climate heat pumps (CCHPs), like this one, still perform more efficiently than an electric-resistance heater or fuel-fired system.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“Still generally better than 1, though, so it still makes sense”
Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“when temperatures drop to as low as -20C, a standard air-source heat pump can still operate with a COP of around 2.”
DENIES Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“when it's down at minus 30 you're essentially it's the same efficiency as a sort of an old-fashioned electric heater”
Probably partly right AI guessCold-climate models keep COP above 1 down to about -13°F, but older or standard units approach COP 1 in deep cold.
Probably right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 2926-2935In the 2016 winter field data, mini-splits averaged COP 1.5 at -10 to 0 F, giving about 50% more heat per kWh than resistance heat; some non-cold-climate units got close to COP 1.0 in very cold hours, but those hours were few.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 425-435Because the heat pump is prioritized and resistance only supplements it, the all-electric system's COP stayed above 1.0 even at the coldest observed temperature (about -7F).
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1199-1208Ductless units averaged daily COP 1.7 and 1.3 between 0F and -13F, and one ran with COP above 1.0 at -19F, beating the electric resistance alternative (COP 1).
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 180-189Heat-pump-only COP had a median of 1.9 at 0-5 F, so the heat pump used roughly half the electricity of resistance heat; once auxiliary heat is included, system COP is lower in the coldest bins.
Leans right RMI 2018, the economics of electrifying buildings lines 966-970RMI's cold-climate unit keeps a COP of 1.4 at -13F, so it still uses less electricity than resistance heat (COP 1).
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 1649-1659Edwards assumes single-stage heat pumps fall to COP 1 (no better than resistance) below 5F, while cold-climate two-stage units keep a higher COP, so the claim depends on equipment type.

Most US households would see lower energy bills with a heat pump

Leans right

Bills rise in 39% of homes with minimum-efficiency units and 5% with cold-climate high-efficiency units, so a majority save in every scenario, though fewer than a third of gas homes do with minimum units.

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Asserts (5)Denies (0)Verdicts (3)

Here's how to take the sting out of the cost of installing a heat pump (Electrek)“62% to 95% of households, depending upon heat pump efficiency – using a heat pump would see a drop in their energy bills.”
For Most Americans, A Heat Pump Can Lower Bills Right Now (Energy.gov)“for over 90% of American households assessed,[1] replacing worn-out heating equipment with the right heat pump[2]—one that matches the home’s needs—will save on energy bills”
Does a Heat Pump Actually Save Money? (EnergySage)“Heat pumps are likely to save you money on heating and cooling, but it's not guaranteed.”
A Guide to Cutting Costs with Heat Pumps | Rewiring America (homes.rewiringamerica.org)“For most American homeowners, one of the best ways to save money and energy is to switch to an electric heat pump”
3 ways heat pumps save you money (homes.rewiringamerica.org)“The average homeowner will save $370 per year by upgrading to a heat pump.”
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 362-366Bills rise in 39% of homes with minimum-efficiency units and 5% with cold-climate high-efficiency units, so a majority save in every scenario, though fewer than a third of gas homes do with minimum units.
Leans right Edwards 2024, inequities in heat pump bill savings lines 290-294Edwards' Monte Carlo model at 2020 prices finds 53% of households in its dataset would clearly see lower energy bills, against 19% higher and 28% unclear, a thin majority under conservative single-stage assumptions.
Leans right AI guessNREL's 2024 national simulation found 62-95% of households would see lower energy bills, depending on heat pump efficiency.

Existing ductwork can be too small for the airflow a heat pump needs

Leans right

Heat pumps need about 400 cfm/ton versus about 156 for non-condensing furnaces because of cooler supply air, and one expert estimates most duct systems handle only 2-3 tons of airflow.

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Asserts (4)Denies (0)Verdicts (4)

“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“I can almost guarantee the duct work is not big enough to handle this amount of air flow”
Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“airflow may become a challenge in existing homes thanks to ductwork restrictions.”
What to Know Before Switching to Whole House Heat Pumps | Ask This Old House (This Old House)“because it's a lower temperature air you probably have to deliver more of that air”
Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“If the ducts were sized for a gas furnace originally you can have issues with a heat pump being able to deliver enough heat”
Very likely right AI guessHeat pumps supply cooler air than furnaces and need more airflow per unit of heat, so ducts sized for a furnace or a smaller AC can restrict them.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 821-829Heat pumps need about 400 cfm/ton versus about 156 for non-condensing furnaces because of cooler supply air, and one expert estimates most duct systems handle only 2-3 tons of airflow.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 760-767At Site 7 undersized return ductwork caused low COP and excess auxiliary heat; rebuilding the return plenum raised capacity, though COP stayed below expected.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1957-197276% of installs needed some duct upgrades and 29% major ones, which drove up price, but the report does not say whether undersized ducts for airflow were the reason.

Federal Inflation Reduction Act rebates for heat pumps are available to most homeowners

Probably wrong

DOE Program Notice 26-2: the federal electrification rebate no longer funds replacing non-electric (gas, oil, propane) heating, which rules out most homes that would switch to a heat pump; it is also an income-limited program run by the states.

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Asserts (2)Denies (2)Verdicts (4)

Here's how to take the sting out of the cost of installing a heat pump (Electrek)“There are Inflation Reduction Act rebates and tax credits to be had right now for heat pumps”
Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“the appliance rebate program, which pays you up to $14,000 to install efficient equipment like heat pumps”
DENIES Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“Between 80 and 150%, it covers half. Above that, nothing at all.”
DENIES Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“income-qualified households (under 150% of Area Median Income) can receive up to $8,000 for a qualifying heat pump”
Probably wrong DOE 2026, Program Notice 26-2 on electric home rebates lines 145-155DOE Program Notice 26-2: the federal electrification rebate no longer funds replacing non-electric (gas, oil, propane) heating, which rules out most homes that would switch to a heat pump; it is also an income-limited program run by the states.
Probably wrong AI guessThe IRA electrification rebates are limited to households under 150% of area median income and many states had not launched them, so most homeowners cannot get them.
Leans wrong National Housing Trust 2026, state rebate tracker lines 17-31The DOE home energy rebates target low- to moderate-income households, and as of Feb 2026 most states had no launch date, so they are not available to most homeowners.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 613-620The $4.5B IRA electrification rebates could cover roughly 500,000 low-income or 1 million moderate-income households, and efficiency rebates 0.5-2 million more, a small fraction of over 110 million households.

Heat pumps on radiator systems often need larger radiators to run efficiently

Leans right

Heat pumps are efficient at low flow temperatures, so radiators sized for hot boiler water often need enlarging.

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Asserts (4)Denies (0)Verdicts (1)

Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“you may need a larger size radiator to ensure that its surface area is large enough”
The Trouble With Heat Pumps (Sabine Hossenfelder)“New heat emitters were needed with 93% of the heat pumps installed as the existing radiators would have been too small”
Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“a heat pump dropped into a house with the old gas boilers small radiators often disappoints”
This is Why Heat Pumps May NOT Be The Future (Skill Builder)“They put in the pipe work, buffer tank, larger radiators, or the underlo heating”
Very likely right AI guessHeat pumps are efficient at low flow temperatures, so radiators sized for hot boiler water often need enlarging.

Heat pumps are a better fit than gas furnaces in mild climates

Leans right

Mild (mixed and coastal) climates have the greatest heat pump potential, and any beneficial gas replacement is in hot or mild climates; cold climates see the smallest benefit.

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Asserts (4)Denies (0)Verdicts (6)

Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“if you're in a moderate climate a heat pump will be able to keep up year-round without breaking the bank”
Does a Heat Pump Actually Save Money? (EnergySage)“If it rarely drops below freezing where you live, a heat pump is almost a no-brainer.”
The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“Where cooling loads dominate, heat pumps do, too.”
Gas Furnace vs Heat Pump (Monkey Wrench Plumbing, Heating, Air & Electric)“a heat pump system particularly an air source heat pump is often a better fit due to the mild climate”
Very likely right AI guessIn mild climates heat pumps run at high COP, need no backup and replace the AC, so they usually beat a furnace plus AC.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 580-584Mild (mixed and coastal) climates have the greatest heat pump potential, and any beneficial gas replacement is in hot or mild climates; cold climates see the smallest benefit.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 497-503Homes with positive NPV from minimum-efficiency heat pumps include most gas homes with central AC in warmer climates.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1286-1288Edwards' counties where heat pumps cut bills are warmer (mean HDD 3,016 versus 6,132 where they cost more), and heat pump use falls as heating degree days rise.
Leans partly right RMI 2018, the economics of electrifying buildings lines 742-747In mild Houston, RMI's heat pumps save over $3,500 in new construction and over $2,000 when the AC is replaced too, but gas stays cheaper for a plain furnace retrofit.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1133-1141In relatively temperate Vancouver and Halifax (and cheap-electricity Montreal), heat pumps beat gas heating with AC in nearly all cases even with high equipment cost, high electricity and low gas prices.

Running a heat pump steadily at low flow temperature costs less than heating in short bursts

Leans right

Monitored UK heat pumps reach higher COPs with weather compensation and continuous low-temperature running, though setbacks can still save in leaky homes.

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Asserts (4)Denies (0)Verdicts (3)

3 years living with a heat pump - stats and my main take-away (Tom Bray)“what we're doing now is we're trickling in heat all the time”
Electric bill shock! How to avoid 'emergency heat' costs (WSPA 7News)“MANY TECHNICIANS ADVISE YOU TO NOT CHANGE THE THERMOSTAT IF YOU GO AWAY ON A SHORT VACATION OR EVEN AT NIGHT.”
I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! (Jonathan Tracey)“depending on what that sensor is sensing, this will adjust the flow temperature of the heat pump.”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“we want to just run it slowly, gently. same as driving a car, you want to run it gently”
Probably right AI guessMonitored UK heat pumps reach higher COPs with weather compensation and continuous low-temperature running, though setbacks can still save in leaky homes.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 963-974For variable-speed air-source units, 'set it and forget it' beats setbacks: homes without setbacks saved $10-$100 more a year; flow temperature (hydronic) is not studied.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1531-1543Morning and evening setbacks made the heat pumps call higher stages of resistance heat to recover, so the authors recommend a constant setpoint or gradual setbacks; this supports steady operation for ducted units but says nothing about flow temperature.

Inverter-driven heat pumps run more efficiently and quietly than single-stage units

Leans right

Variable-speed compressors have higher SEER2/HSPF2 ratings and lower sound levels at part load.

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Asserts (4)Denies (0)Verdicts (1)

$21k VS $7k Air Conditioner Heat Pump | Scam Or Real | HVAC Review (HVAC Talkshow and Review For Homeowners & DIY)“This is the sound of it. Can't barely hear anything.”
Heat Pump Cost Comparison: Winter heating vs. Gas Furnace (Scott Explains)“we wanted something much quieter more efficient and variable speed”
Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“in general the best types of heat pumps are always going to be inverters”
Heat Pumps in 2026 | What you should know (The Thought Provocateur)“Inverter-driven systems are number one most efficient. Number two, they're most quiet.”
Very likely right AI guessVariable-speed compressors have higher SEER2/HSPF2 ratings and lower sound levels at part load.

A heat pump makes the most financial sense when the air conditioner also needs replacing

Leans right

Incremental cost falls to $4,270 at AC failure and $370 when furnace and AC both fail (payback 0.6-1.1 years), versus 14.5-28.8 years with no failure.

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Asserts (4)Denies (0)Verdicts (7)

Converting a Furnace To A Heat Pump! (HVAC GUY)“it would have cost him $3,000 more than the system that I just installed”
Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips (HouseBarons)“our air conditioner condenser died and so they're going to just replace the condenser”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“If the AC is near end-of-life, a heat pump can replace both systems at once”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“replacing a failing central AC represents one of the easiest and lowest-cost opportunities to scale ASHP adoption”
Very likely right AI guessWhen both systems are due, a heat pump's extra cost over a new AC is small, so payback is far shorter than when replacing working equipment.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 522-526Homes without existing AC are doubly challenged: higher bills from new cooling and a higher incremental cost because there is no AC replacement to offset.
Leans right RMI 2018, the economics of electrifying buildings lines 1268-1272RMI finds heat pump retrofits of gas homes generally cost more, with the notable exception of a customer replacing both furnace and AC, whom one heat pump serves (true in Houston, Chicago and Oakland but not Providence).
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 513-516Retrofit paybacks typically exceed 10 years unless equipment needs replacing; at heating or cooling system failure the payback drops to 5-6 years.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1386-1408Incremental cost falls to $4,270 at AC failure and $370 when furnace and AC both fail (payback 0.6-1.1 years), versus 14.5-28.8 years with no failure.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2288-2293LBNL: the heat pump's cost premium over gas equipment disappears once cooling must also be added (like-for-like heating plus cooling), which is the case when the air conditioner also needs replacing.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 842-846Doubling as cooling is one reason heat pumps beat gas plus AC on lifetime cost, but the model always compares full replacements and does not test the case where only the furnace is due.

A heat pump needs a heat loss calculation and system design to work well

Leans right

Field studies tie poor heat pump efficiency to bad sizing and emitter or flow design; a heat loss calculation is standard good practice.

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Asserts (4)Denies (0)Verdicts (2)

Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“you need to calculate what your heat load is going to be on that house”
I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“for a air to water heat pump to work well, the design has to be done correctly.”
6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“you really need to have a qualified HVAC contractor do those calculations for you”
Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“If you get the heat calculations done for your house properly and it's installed properly”
Very likely right AI guessField studies tie poor heat pump efficiency to bad sizing and emitter or flow design; a heat loss calculation is standard good practice.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2131-2135Heating load calculations predicted Site 8's excessive auxiliary heat use from undersizing, and the report says auxiliary use should be minimized by proper sizing and controls.

A heat pump costs about the same as or less than a new furnace plus central air conditioner

Leans right

Edwards' median installed heat pump ($6,185) costs about $270 less than a gas furnace plus central AC and about $90 more than resistance plus AC, with over 80% of the cost distributions overlapping.

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Asserts (3)Denies (1)Verdicts (7)

Need air conditioning? Consider the heat pump. (Canary Media)“installing a heat pump in a single-family home in the region typically costs $1,000 less than installing a gas furnace and AC”
Does a Heat Pump Actually Save Money? (EnergySage)“Installing a heat pump often costs less than simply swapping in a new AC and furnace or boiler”
Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC (How to Choose Best HVAC Systems)“AC + Furnace (Full HVAC) $9,000–$18,000 Comparable to a single heat pump system covering both modes.”
DENIES Will a heat pump save you money? It depends (Canary Media)“that combo would cost on average $11,000, which is still much less than the average sticker price of upgrading to a medium-efficiency heat pump”
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 451-457In cold-climate ducted homes with central AC the minimum-efficiency heat pump averages $2,000 less than furnace plus AC, but medium and high-efficiency units cost $8,000 and $13,000 more.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1829-1836Edwards' median installed heat pump ($6,185) costs about $270 less than a gas furnace plus central AC and about $90 more than resistance plus AC, with over 80% of the cost distributions overlapping.
Leans partly right AI guessSome programs find parity, but NREL/LBNL 2024 put medium- and high-efficiency heat pumps well above a furnace-plus-AC replacement.
Leans right RMI 2018, the economics of electrifying buildings lines 455-460RMI says customers replacing both an AC and a furnace can save installation cost by choosing one heat pump for both jobs.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2288-2293LBNL archetypes: electric equipment (ductless heat pump plus heat pump water heater, $14,754) cost more than gas ($8,786), but the gap almost exactly equals the $5,930 cost of adding central air, implying no premium when comparing heating plus cooling like for like.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1386-1408When both furnace and AC need replacing, a ccASHP with propane furnace backup costs only $370 more than a new furnace plus AC (payback under about one year).
Leans wrong Canadian Climate Institute 2023, heat pumps pay off lines 842-846Compared with the gas-plus-AC baseline, the Canadian model finds heat pumps have higher upfront costs and win only on lifetime costs through efficiency and doubling as cooling.

Heat pump water heaters use far less energy than conventional water heaters

Leans right

RMI models heat pump water heaters at a COP of 2.53-2.64 against 0.59-0.62 for gas, oil and propane water heaters, about four times the delivered heat per unit of energy.

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Asserts (4)Denies (0)Verdicts (3)

Contractor (Contractor Magazine)“The DHW is now being frugally produced with a heat pump water heater”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“Heat pump water heaters (HPWHs) can also deliver meaningful bill savings, as they are three to four times more efficient than conventional units.”
How Heat Pumps Reduce Energy Bills and Air Pollution in the San Francisco Bay Area (RMI)“they are typically more than three times more efficient than gas water heaters”
Which home energy upgrades will save you money? We did the math. (Washington Post)“Switching to a heat pump version, energy auditors found, would save $240 per year and cost just $978 after local utility rebates.”
Very likely right AI guessHeat pump water heaters have energy factors of about 3-4 versus about 0.9 for resistance and 0.6-0.7 for gas tanks.
Leans right RMI 2018, the economics of electrifying buildings lines 1720-1740RMI models heat pump water heaters at a COP of 2.53-2.64 against 0.59-0.62 for gas, oil and propane water heaters, about four times the delivered heat per unit of energy.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2857-2861LBNL: installed electric heat pump water heaters had a median Energy Factor of 3.15, compared with all other water heater types below 1.0 (rated efficiency, not metered use).

Contractors routinely oversize heating and cooling equipment

Leans right

Field studies of US residential HVAC commonly find furnaces and ACs sized well above calculated design loads.

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Asserts (3)Denies (0)Verdicts (6)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“Around here they all seem to be oversized by a factor of about 2.”
Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“find out just how oversized your heating system is, which around here they almost always seem to be by a factor of 2”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“even respectable, well-known installers in my area are routinely putting way more heating capacity into homes than those homes actually need”
Probably right AI guessField studies of US residential HVAC commonly find furnaces and ACs sized well above calculated design loads.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3103-3127Program mini-splits averaged about 2.1-2.6 times the Manual J cooling load of the spaces they served, but for heating nearly half were undersized, so the oversizing was one-directional and probably came from sizing to heating.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1943-1951The furnaces being replaced (mostly 66-100 kBtu/h gas) tended to be well above the homes' Manual J heating loads, so the cold-climate heat pumps installed were much smaller; this covers 21 sites and furnaces only.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 2842-2853LBNL: fuel-fired heating equipment was sized far larger (typically 356 ft2 per ton) than heat pumps or air conditioners (543 and 555 ft2 per ton), suggesting generous furnace sizing, while many heat pumps were sized aggressively small; no load calculations were compared.
Leans wrong Winkler 2023 (NREL), cold-climate heat pump field validation lines 1131-1139Heating-load audits found the heat pumps at Sites 5 and 8 very undersized (under 40% of design load) and Sites 10, 11 and 13 also undersized; oversizing was the exception in this 12-site northwest sample.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 763-765The authors cite overly conservative equipment sizing as a cause of high upfront costs to be addressed with sizing guidance, without measuring how common it is.

Heat pumps deliver cooler supply air than a gas furnace, which some people find less comfortable

Leans right

Heat pump supply air rarely exceeded 100F (often around 80F) versus about 120F for fossil furnaces; occupant comfort was not measured.

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Asserts (3)Denies (0)Verdicts (4)

Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“we can clearly see that a gas system gets quite a bit hotter than a heat pump”
Heat Pump vs Furnace: Think TWICE Before Switching (Jordan Dearden)“A heat pump puts out air that's typically 85° to 95°.”
Old Furnace: Repair or Replace? (The Money Pit)“Oil powered furnace air comes out at 140 degrees. With a heat pump, that temperature drops to about 110 degrees.”
Very likely right AI guessHeat pump supply air is typically 90-100°F versus 120-140°F for furnaces, a common comfort complaint.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2461-2475Heat pump supply air rarely exceeded 100F (often around 80F) versus about 120F for fossil furnaces; occupant comfort was not measured.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1192-1198Heat pumps have lower supply air temperatures than furnaces, so duct sealing is recommended to keep the air supplied to rooms comfortable.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1312-1321Units that kept the fan on without auxiliary heat during defrost blew air averaging below 60 F, yet no occupant complained of it; it is a defrost-period effect, not a general comparison with furnace supply air.

Heat pump installation quotes vary widely between contractors for similar equipment

Leans right

Quote comparisons and program data show installed heat pump prices for similar homes varying by multiples between contractors.

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Asserts (3)Denies (0)Verdicts (4)

“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“recommended systems range from 35k up to 60k”
Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“people getting $20,000 or even $30,000 quotes to install equipment”
Heat Pump & AC costs have SKYROCKETED 🚀 What you can do (The Thought Provocateur)“if you see one bid that is substantially cheaper than the other two I would be very wary of that bid”
Very likely right AI guessQuote comparisons and program data show installed heat pump prices for similar homes varying by multiples between contractors.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1286-1293Even after location and inflation corrections, installed costs remain extremely variable, driven in part by pricing strategies and installer experience.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 3005-3010LBNL: the range of costs for almost all measures is very large (interquartile ranges about half the mean or more), driven by building condition, climate and other variables; the data do not isolate contractor-to-contractor spread for identical equipment.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1453-1454The model adds high upfront-cost sensitivities to reflect the wide variety of contractor quotes consumers receive.

Natural gas costs much less than electricity per unit of energy delivered to the home

Very likely right

At 2024 US average residential prices electricity costs $48.30/MMBtu versus $14.00 for gas, a ratio of 3.45 (state range 1.69 Florida to 6.42 Alaska).

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Asserts (3)Denies (0)Verdicts (5)

Furnaces: Why we still burn fuel to heat our homes (Technology Connections)“And that means that gas heat is a lot cheaper than electric heat”
Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association (American Gas Association)“natural gas costs are 3.4 times more affordable than electricity and other residential fuels.”
Here's how to take the sting out of the cost of installing a heat pump (Electrek)“natural gas prices are much lower than electricity prices on a BTU basis in many parts of the US.”
Very likely right EIA, state residential electricity and gas prices lines 130-131At 2024 US average residential prices electricity costs $48.30/MMBtu versus $14.00 for gas, a ratio of 3.45 (state range 1.69 Florida to 6.42 Alaska).
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1071-1077In the UK in June 2024, Octopus's average electricity unit rate was £0.2450/kWh against £0.0604/kWh for gas, about four times as much; government retail prices show similar gaps.
Leans right AI guessUS residential gas costs roughly a third to a quarter of electricity per unit of energy.
Leans right RMI 2018, the economics of electrifying buildings lines 1813-1819RMI's 2017-18 rate table puts Chicago at $0.111/kWh for electricity and $0.56/therm for gas (about $0.019/kWh), and Providence at $0.19/kWh and $1.23/therm (about $0.042/kWh), so gas was roughly 4.5-6 times cheaper per unit of energy.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 108-113Background statement that propane, oil and electricity have traditionally been significantly more expensive than natural gas for heating; not a measurement, and per raw energy unit rather than per delivered heat.

Snow and ice buildup on the outdoor unit can stop a heat pump from heating

Leans right

In the snowy 2015 winter several outdoor units were encased in snow or ice and, without clearance, 'could not provide heating'; buried units for up to a month also visibly lowered that winter's measured efficiencies.

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Asserts (3)Denies (0)Verdicts (2)

Heat Pump in -30 C. Canadian Winter Struggles (The Clean Energy Show)“the fan stopped spinning because there was just a little bit too much ice in there”
Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips (HouseBarons)“making sure that in in a high snow area that those fins don't get blocked”
Top 3 Heat Pump ISSUES in Winter! (HVAC Guide for Homeowners)“systems will just not properly defrost like they should and it's not sensing that ice like it should”
Very likely right AI guessBlocked coils or frozen fans cut output; manufacturers recommend raised mounts and clearance in snowy areas.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3303-3310In the snowy 2015 winter several outdoor units were encased in snow or ice and, without clearance, 'could not provide heating'; buried units for up to a month also visibly lowered that winter's measured efficiencies.

Incentives can make a heat pump cheaper upfront than a furnace and air conditioner

Leans partly right

Possible where large state or utility rebates stack, but in most of the US incentives narrow rather than reverse the upfront gap.

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Asserts (3)Denies (0)Verdicts (4)

Best Heat Pump Buying Guide - Consumer Reports (Consumer Reports)“with state- or utility-based subsidies, such as tax incentives or cash rebates, a heat pump can cost less than other heat-only systems.”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“making this substantially lower cost than a new gas furnace and air conditioner”
Five policies to lower heating bills and accelerate heat pump adoption in Illinois (RMI)“would likely make a heat pump less expensive than installing a new AC and furnace”
Leans partly right AI guessPossible where large state or utility rebates stack, but in most of the US incentives narrow rather than reverse the upfront gap.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 633-641Applying $13,500 in rebates and credits shifts the incremental upgrade cost distribution left by that amount, and positive NPV rises to 84-90% of homes.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1829-1836Edwards' national medians already put a heat pump ($6,185) about $270 below a gas furnace plus AC, with over 80% overlap in cost distributions, so even small incentives would make it cheaper upfront.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1482-1488In Canada heat pumps still cost more upfront despite rebates meant to lower capital costs, though some programs cover the full cost for low-income households.

A heat pump raises a home's resale value

Leans right

Edwards notes in passing, citing other work, that homes with heat pumps may sell at a price premium.

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Asserts (3)Denies (0)Verdicts (2)

Factcheck: 18 misleading myths about heat pumps (Carbon Brief)“The evidence suggests the opposite: heat pumps increase the value of properties.”
Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“electrified homes uh can actually command a higher premium on the market”
The TRUE Payback Time for Heat Pumps (Heat Geek)“the value of your property would have increased”
Leans right Edwards 2024, inequities in heat pump bill savings lines 75-77Edwards notes in passing, citing other work, that homes with heat pumps may sell at a price premium.
Unknown AI guessEvidence of a sale-price premium is limited and mostly from industry or small studies.

Ductless mini-splits may not distribute heat evenly through a whole house

Leans right

Because a mini-split heats one or two rooms, homes with a single-zone furnace found it hard to use as the primary heat without underheating the rest of the house.

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Asserts (2)Denies (1)Verdicts (3)

6 Years of Savings from Mini-Split Heat Pump in Cold Climate (Matt Rosendaul)“the bedrooms don't get quite the same temperature conditioning as the living room does”
How efficient are our minisplit heat pumps in the winter (Matthias random stuff)“the mini splits don't put the heat exactly where we want it when we want it.”
DENIES Why is my electric Bill so High!!! Mitsubishi Mini Split Hyper Heat Review Part 4. Feb 2020 Bill (J-Mart)“it's throughout the entire house it's all the same nice comfortable temperature”
Probably right AI guessA few wall heads heat open areas well but closed-off rooms lag, a common finding in ductless retrofits.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1133-1138Because a mini-split heats one or two rooms, homes with a single-zone furnace found it hard to use as the primary heat without underheating the rest of the house.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 171-177Ductless units were sized for the open living zone; closed-off back bedrooms in both homes were mainly heated by baseboards, so the mini-split covered only a fraction of the house.

A heat pump shifts heating cost onto the electricity bill, which can rise sharply in winter

Probably right

UK households' electricity use rose 61% (3,080 kWh/yr) after a heat pump, concentrated in winter at over 200 kWh/week and near zero from April to October.

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Asserts (3)Denies (0)Verdicts (5)

I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“some of that cost simply shifts across to your electricity bill, which can be a little shocking when you see it first happening.”
Massachusetts homeowners say state is ignoring cost in push toward all electric heat (WCVB Channel 5 Boston)“THEY HARDLY USED TO PAY AN ELECTRIC BILL, OWING NATIONAL GRID LESS THAN $800 TOTAL FOR ALL OF LAST WINTER.”
Why is my electric Bill so High!!! Mitsubishi Mini Split Hyper Heat Review Part 4. Feb 2020 Bill (J-Mart)“it was a four hundred and some odd dollars in January”
Very likely right AI guessHeating load moves from the gas or oil bill to the electricity bill, so winter electricity bills rise even when total energy cost falls.
Probably right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1059-1064UK households' electricity use rose 61% (3,080 kWh/yr) after a heat pump, concentrated in winter at over 200 kWh/week and near zero from April to October.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 873-876Annual savings can hide more month-to-month variation, with bills rising in winter months and falling in summer.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1087-1098Flex-fuel homes went from 2-3% of heating site energy as electricity in furnace-only mode to 48-69% with the ccASHP, moving most of the heating bill onto electricity.
Leans partly right Mass Save 2026, air-source heat pump rebates lines 23-26Mass Save: heat pumps 'will likely increase your electric usage', which many customers offset by cutting oil or propane; the page does not say how much winter electric bills rise.

Most US homes would save money over the equipment's life by switching to a heat pump

Leans wrong

With minimum-efficiency heat pumps, 7% discount rate and 15-year life, only 21% of US single-family houses would gain economically.

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Asserts (3)Denies (0)Verdicts (6)

Need air conditioning? Consider the heat pump. (Canary Media)“For most households, these two-in-one appliances pay for themselves in reduced energy bills over their estimated 16-year lifetime.”
Will a heat pump save you money? It depends (Canary Media)“heat pumps make economic sense for an estimated 65 million out of 110 million households in the U.S.”
Heat Pump vs Gas Furnace - Which is the Best Choice For You? (HVACDirect)“with modern technology inverter Drive heat pumps it pretty much always makes sense to install one”
Leans wrong Deetjen 2021, private economics of US residential heat pumps lines 886-889With minimum-efficiency heat pumps, 7% discount rate and 15-year life, only 21% of US single-family houses would gain economically.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 645-647Picking the best package per home, 59% (65 million) have positive unsubsidized NPV over 16 years, but no single package exceeds 55%, and that is an idealized best choice.
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 857-860Edwards cites earlier studies finding only about 30% of households would benefit from a single-speed heat pump and newer cold-climate studies about 60%; its own bill model gives 53% with 28% uncertain, so the majority is thin and depends on assumptions.
Leans partly right AI guessNREL modelling finds most US households would see bill savings with efficient heat pumps, but gas-heated homes often see small or negative lifetime returns once installed cost is counted.
Leans partly right RMI 2018, the economics of electrifying buildings lines 1325-1327RMI concludes that most of the 56 million gas-heated US households would not find a heat pump cost-effective at 2018 prices, although propane, oil and new-build homes would.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 842-846Modelling of five Canadian cities finds a heat pump is the lowest lifetime-cost heating and cooling option for most households; this is Canada with its rebates and carbon price, not the US.

Switching to a heat pump cuts heating bills by half or more

Leans wrong

In the UK, replacing a gas boiler with a heat pump raised measured running costs by about £190/yr on a standard tariff, far from halving bills, even though energy use fell 40%.

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Asserts (1)Denies (1)Verdicts (6)

Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“It's roughly halved.”
DENIES Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“the actual saving on your bill, once you switch from gas, lands closer to 20 to 30%, not 70%”
Probably wrong AI guessTypical measured savings versus gas are small or negative; halving bills happens mainly when replacing oil, propane or resistance heat.
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 290-294Edwards' Monte Carlo bill model finds only 53% of households would clearly see lower energy bills from a heat pump, 19% would pay more and 28% show no clear change, which contradicts a general halving of bills.
Leans wrong Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1855In the UK, replacing a gas boiler with a heat pump raised measured running costs by about £190/yr on a standard tariff, far from halving bills, even though energy use fell 40%.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 298-314Cost reductions were 26-40% against propane furnaces and 53-56% against electric resistance, so 'half or more' held only for resistance-heated homes.
Leans wrong RMI 2018, the economics of electrifying buildings lines 158-161In RMI's gas retrofits, energy costs rise with a heat pump in Chicago and Providence and fall only modestly in Houston and Oakland.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 332-334Even national average site energy savings are 31-47% depending on efficiency, and bill savings are smaller because electricity costs more per unit; average bill savings are $100 (minimum-efficiency) to $740 a year.

The UK Boiler Upgrade Scheme grant requires removing the existing gas boiler

Leans right

BUS rules require the heat pump to replace the fossil fuel system fully; hybrid systems are not eligible.

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Asserts (2)Denies (0)Verdicts (1)

This is Why Heat Pumps May NOT Be The Future (Skill Builder)“that's the only way you're going to get that grant is if you actually junk your gas boiler out.”
Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“They made me get rid of my gas boiler. I deeply regret it.”
Very likely right AI guessBUS rules require the heat pump to replace the fossil fuel system fully; hybrid systems are not eligible.

Heat pump outdoor units are noisy enough to cause neighbour complaints

Leans partly right

Modern units are typically around 40-60 dB at a few metres and complaints are uncommon, though poorly placed units can bother neighbours.

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Asserts (1)Denies (1)Verdicts (1)

This is Why Heat Pumps May NOT Be The Future (Skill Builder)“I can hear the fan going. My neighbors complaining about it.”
DENIES Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“loads of people say they're dead noisy. Not anymore.”
Leans partly right AI guessModern units are typically around 40-60 dB at a few metres and complaints are uncommon, though poorly placed units can bother neighbours.

With electric backup, the heat pump keeps running alongside the heat strips to cut backup use

Leans right

Below the switchover temperature the cold-climate units mostly ran heat pump plus staged auxiliary heat (supplemental mode), with auxiliary-only operation minimal above 0 F, and staging used the smallest element needed.

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Asserts (2)Denies (0)Verdicts (3)

MYTHS about Heat Pumps! (HVAC Guide for Homeowners)“unlike a dual fuel system it's not going to turn off the outdoor unit the outdoor unit's still going to run”
Heat Pump SHUT OFF Temp with AUX HEAT! (HVAC Guide for Homeowners)“the majority of those types of systems with electric backup do not shut off based on what the outdoor temperature is”
Very likely right AI guessStandard heat pump controls stage resistance strips on top of the running compressor, unlike dual-fuel lockout.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 384-395All-electric systems let the heat pump run wherever possible with resistance boosting it, unlike fixed-changeover propane systems, so the heat pump met more of the load: annual COP 1.9 versus 1.3.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1238-1244Below the switchover temperature the cold-climate units mostly ran heat pump plus staged auxiliary heat (supplemental mode), with auxiliary-only operation minimal above 0 F, and staging used the smallest element needed.

Setting an auxiliary heat lockout temperature keeps backup strip heat from running in mild weather

Leans right

Lockout controls prevent strip heat above a set outdoor temperature, a requirement in the IECC.

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Asserts (2)Denies (0)Verdicts (3)

MYTHS about Heat Pumps! (HVAC Guide for Homeowners)“a lot of thermostats have backup timers”
What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“This protects against the strip heat kicking on unnecessarily during mild weather, which is a huge driver of high electric bills.”
Very likely right AI guessLockout controls prevent strip heat above a set outdoor temperature, a requirement in the IECC.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2103-2111Auxiliary energy largely tracked each site's auxiliary lockout temperature, with little use in the bin just above it; the exceptions were a faulty unit and an undersized one.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1211-1230The thermostat's switchover setpoint sets the outdoor temperature above which auxiliary heat may not be called; observed switchover temperatures were higher than optimal because of programming and setbacks.

A faulty heat pump can run unnoticed on backup resistance heat and send bills soaring

Leans right

At Site 2 a control or sensor fault left the compressor idle from February 16 to April 11 while resistance heat carried the home, and the homeowner did not notice; auxiliary energy exceeded compressor energy.

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Asserts (2)Denies (0)Verdicts (3)

Electric bill shock! How to avoid 'emergency heat' costs (WSPA 7News)“IF THE HEAT PUMP FAILS IN THAT SAME UNIT, YOU WON'T KNOW IT BECAUSE OF THE AUXILIARY POWER.”
Top 3 Heat Pump ISSUES in Winter! (HVAC Guide for Homeowners)“they're going months at a time low refrigerant heat pump is struggling but because there's a backup heat Source they don't even know it”
Very likely right AI guessBackup strips keep the house warm when the compressor fails, so the fault often shows up only as a high bill.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2108-2123At Site 2 a control or sensor fault left the compressor idle from February 16 to April 11 while resistance heat carried the home, and the homeowner did not notice; auxiliary energy exceeded compressor energy.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 836-843Several prototype sites had long stretches (up to 3,444 hours) where the heat pump did not work as intended and the home ran on supplemental heat until manufacturer or contractor intervention; bills were not measured.

Burning gas in a power plant to run a heat pump delivers more heat than burning it in a home furnace

Leans right

RMI's water-heating example finds a heat pump water heater powered by a combined-cycle gas plant burns less gas and emits less than a gas-fired water heater, so burning gas at the plant is more efficient than burning it at home.

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Asserts (1)Denies (1)Verdicts (2)

Why Heat Pumps are Immensely Important Right Now (Technology Connections)“it actually makes more sense to burn natural gas in a power plant to generate electricity than it does to pipe that gas into homes”
DENIES Out of Gas: New York’s Blocked Pipelines Will Hurt Northeast Consumers (Manhattan Institute)“preventing the direct use of gas in homes and businesses—which would be more efficient than burning it in power plants”
Probably partly right AI guessWith about 40-50% plant efficiency, a seasonal COP above roughly 2-2.5 beats a condensing furnace, which most modern units achieve except in deep cold.
Leans right RMI 2018, the economics of electrifying buildings lines 927-946RMI's water-heating example finds a heat pump water heater powered by a combined-cycle gas plant burns less gas and emits less than a gas-fired water heater, so burning gas at the plant is more efficient than burning it at home.

A cold-climate heat pump needs backup heat only on a few of the coldest days of the year

Leans partly right

Field studies in cold climates show backup covering a small share of heat, but more in very cold places or with poor controls.

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Asserts (2)Denies (0)Verdicts (4)

What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“I tell homeowners the heat pump's going to handle 95 to 98% of your heating hours over the course of the year.”
Why Heat Pumps are Immensely Important Right Now (Technology Connections)“The thing to keep in mind about these backups, though, is that they are needed only in exceptional cases.”
Probably partly right AI guessField studies in cold climates show backup covering a small share of heat, but more in very cold places or with poor controls.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 198-237The two units sized above design load met over 95% of load by compressor and six sites used little auxiliary heat, but an undersized unit (about 20% of load on resistance) and a faulty one leaned on backup far more.
Leans wrong CEE 2017, cold-climate heat pumps in Minnesota lines 1493-1501Beyond the furnace running below the 10F changeover, defrost cycles created backup energy use at outdoor temperatures between 10F and 40F, well beyond a few coldest days.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1238-1247Supplemental heat appeared from about 30-35 F, which is well above 'the coldest days', but it was a small fraction of heat between 0 and 35 F; the authors attribute much of it to setbacks and thermostat programming and expect lower switchover with better controls.

Radiator size and flow temperature decide whether a heat pump costs less to run than a gas boiler

Leans partly right

Larger emitters allow lower flow temperatures and higher COP, but the electricity-to-gas price ratio is just as decisive.

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Asserts (2)Denies (0)Verdicts (1)

3 years living with a heat pump - stats and my main take-away (Tom Bray)“I might have asked for some bigger radiators or for some more radiators”
Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“That relationship between your radiator sizing and the demand of heat in your house is what dictates if this unit is going to pay back”
Probably partly right AI guessLarger emitters allow lower flow temperatures and higher COP, but the electricity-to-gas price ratio is just as decisive.

The federal heat pump tax credit was nonrefundable, so it gave nothing to households without tax liability

Very likely right

IRS 25C page: the credit is nonrefundable, so you cannot get back more than you owe in taxes and cannot carry excess forward.

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Asserts (2)Denies (0)Verdicts (3)

25C Heat Pump Federal Tax Credits: A Guide (homes.rewiringamerica.org)“The 25C tax credit is “non-refundable,” which means that you can't get back more than you pay in federal income taxes.”
Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“if you don't have a tax liability for the year there's no tax benefit to putting in any of this equipment”
Almost certainly right AI guess25C was a nonrefundable credit with no carryforward, limited to the taxpayer's liability.
Very likely right IRS, the 25C home improvement credit lines 33-34IRS 25C page: the credit is nonrefundable, so you cannot get back more than you owe in taxes and cannot carry excess forward.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 620-625Using the tax credits requires enough income and taxes paid: about $33,000 (single) or $48,000 (joint) to claim the full $2,000 heat pump credit in 2023.

A heat pump removes the carbon monoxide risk of combustion heating

Leans right

An electric heat pump has no combustion, so it removes that carbon monoxide source, though other gas appliances may remain.

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Converting a Furnace To A Heat Pump! (HVAC GUY)“They can replace a gas furnace down here and make the house safer.”
What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“running a gas or oil-based furnace introduces several pitfalls for one there is the risk of carbon monoxide poisoning”
Very likely right AI guessAn electric heat pump has no combustion, so it removes that carbon monoxide source, though other gas appliances may remain.

Heat pumps give more even heating and cooling than furnaces and air conditioners

Leans partly right

Variable-speed heat pumps run longer at low output and even out temperatures, but single-stage units and poor installs do not.

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Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“they just create much more even heating and cooling”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“the temperatures now throughout the house are pretty consistent”
Probably partly right AI guessVariable-speed heat pumps run longer at low output and even out temperatures, but single-stage units and poor installs do not.

A ground-source heat pump pays back its extra cost within about a decade

Leans partly right

DOE's 5-10 year figure assumes favourable fuels and incentives; against gas without credits paybacks are often much longer.

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Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“they have a payback period of 5-10 years”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“The typical payback and savings in the system is usually around eight to 10 years”
Leans partly right AI guessDOE's 5-10 year figure assumes favourable fuels and incentives; against gas without credits paybacks are often much longer.

Ground-source heat pumps work efficiently in almost any climate because ground temperature is stable

Leans right

Ground temperatures a few metres down stay near the annual mean, so ground-source COP varies little with weather.

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Why Heat Pumps are Essential for the Future - Explained (Undecided with Matt Ferrell)“can work efficiently basically everywhere since the ground has lower temperature variations”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“They can work well in almost all climates.”
Very likely right AI guessGround temperatures a few metres down stay near the annual mean, so ground-source COP varies little with weather.
Leans right RMI 2018, the economics of electrifying buildings lines 390-394RMI explains that ground-source heat pumps suit cold climates because the ground stays moderate when the air is very cold, so they use less energy on the coldest days.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 394-396Ground-source heat pumps draw heat from below ground, are highly efficient and perform well in extreme temperatures (a descriptive secondary citation).

Geothermal ground loops last for decades, far longer than the heat pump unit

Leans right

Polyethylene ground loops are rated for 50 years or more while the indoor unit typically lasts about 20 to 25 years.

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Asserts (2)Denies (0)Verdicts (1)

Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“that portion of the system can last decades. We’re talking as long as 50 years or more.”
Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained (Undecided with Matt Ferrell)“around 50 years for the underground infrastructure”
Very likely right AI guessPolyethylene ground loops are rated for 50 years or more while the indoor unit typically lasts about 20 to 25 years.

A home battery charged on cheap off-peak electricity cuts a heat pump's running cost

Leans partly right

A battery lets heating run on off-peak rates where time-of-use tariffs exist, but the battery's own cost usually outweighs the heating saving.

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Asserts (2)Denies (0)Verdicts (2)

What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) (Octopus Energy)“those who had other Green Tech like a battery for example made Savings of up to 27 %”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“battery storage, which is going to make it considerably cheaper to run, is roughly going to half the price”
Leans partly right AI guessA battery lets heating run on off-peak rates where time-of-use tariffs exist, but the battery's own cost usually outweighs the heating saving.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1434-1440Among UK Cosy-tariff customers, some respond by charging and discharging a home battery, and there is suggestive evidence that battery cycling is an important part of the tariff effect for battery owners; the running-cost saving from the battery itself is not measured.

Modern heat pumps run quietly

Leans right

Inverter heat pumps typically run around 40 to 55 dBA outdoors, comparable to or quieter than central AC units.

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Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“inverter heat pumps have and modulating furnaces take the cake in this category because they are very quiet”
Heat Pump at –3°C: The Truth No One Tells You (UpsideDownFork)“Aside from that, you don't know it's running.”
Probably right AI guessInverter heat pumps typically run around 40 to 55 dBA outdoors, comparable to or quieter than central AC units.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1747-1769Two to four of 7-17 respondents per season reported noise, mostly louder indoor airflow than their furnace plus a vibration and a bad bearing, but noise never affected overall satisfaction.

The installed cost of a heat pump varies widely with the home, location and system type

Probably right

LBNL (642 heat pump installs, median $8,027): costs vary substantially by heat pump type (ground source nearly 3x others), and the main cost drivers were capacity, type, floor area, efficiency, climate zone, program and stories.

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Asserts (2)Denies (0)Verdicts (6)

Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“how much would it cost to put in a heat pump and that answer is going to be it depends”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“The most important thing to know about the cost of any heat pump is that it’s extremely variable.”
Very likely right AI guessInstalled prices vary with system type, capacity, ductwork, electrical work and regional labour costs.
Probably right Less 2021 (LBNL), cost of decarbonization retrofits lines 3046-3056LBNL (642 heat pump installs, median $8,027): costs vary substantially by heat pump type (ground source nearly 3x others), and the main cost drivers were capacity, type, floor area, efficiency, climate zone, program and stories.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1286-1293Installed costs remain extremely variable even after corrections, driven by deferred maintenance, pricing strategies, market experience, integration with existing systems and local codes.
Leans right Edwards 2024, inequities in heat pump bill savings lines 847-852Edwards reports that heat pump costs vary substantially across households and regions (typically $5,000-$10,000 for air-source) with home size, efficiency, climate, labour and installer experience.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1969-1976Invoice totals varied widely by region and install complexity; upgrade costs alone ranged from $3,258 to $18,400 excluding the equipment, with major duct work tied to big price jumps.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1160-1168Heat pump equipment and installation costs vary widely in Canada, driven by limited suppliers in some regions and largely by brand, while gas systems vary less.

Heat pump reliability problems mostly come from poor installation

Leans partly right

Installation faults are common (DOE and NIST find most HVAC systems have at least one), but equipment defects and defrost problems also cause failures.

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Asserts (2)Denies (0)Verdicts (2)

The Truth About HVAC Scams & Heat Pump Hype | Handy Bros. CEO Sets the Record Straight (Handy Bros. Home Comfort)“They get a bad name when really it all comes down to the contractor who installed it.”
Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“a heat pump is only as reliable as its installer”
Probably partly right AI guessInstallation faults are common (DOE and NIST find most HVAC systems have at least one), but equipment defects and defrost problems also cause failures.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 745-767Of the site problems, one was undersized return ductwork (installation) while others were a control board failure and a control or sensor fault, so causes were mixed in this small sample.

Heat pumps in cold climates may need a backup heat source on the coldest days

Probably right

With much of Minnesota below -10F design temperature, the heat pump is unlikely to meet the full load at all temperatures, making a backup heat source necessary.

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Contractor (Contractor Magazine)“Elizabeth's heat pump ran as a straight-electric heater for many weeks this past winter”
HVAC Installation Costs: AC, Heat Pump, & Furnace (This Old House)“if you live in a cold-climate region, a heat pump may require a backup furnace on the coldest winter days”
Very likely right AI guessMany cold-region installs keep a furnace or resistance strips for design-day loads, though properly sized cold-climate units can heat without one.
Probably right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 217-227With much of Minnesota below -10F design temperature, the heat pump is unlikely to meet the full load at all temperatures, making a backup heat source necessary.
Probably right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1113-1120Even Manual-J-sized cold-climate prototypes showed a common need for some auxiliary support at 0-10 F at several sites, though it was a small fraction of total output.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 458-461Heat pumps sized for cooling rely on electric resistance heat when the heat pump alone cannot meet the heating load.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 543-546Despite better cold-weather performance, a backup system may still be needed in parts of Canada to keep a home warm in the coldest periods, and insurers often require one.
Leans right Edwards 2024, inequities in heat pump bill savings lines 832-841Edwards notes that air-source heat pumps become markedly less efficient in extreme cold, where dual-fuel or resistance backup has traditionally been used, though two-stage units reduce the need.

Many installers charge heat pump prices far above the equipment and labor cost

Leans partly right

Installed heat pump prices are high and opaque relative to equipment cost, but evidence on systematic markups beyond labor, permits and overhead is mostly anecdotal.

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Asserts (1)Denies (0)Verdicts (3)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“I cannot see the quote he got as anything but a dishonest company taking advantage of someone looking to install a “trendy” heat pump”
Leans partly right AI guessInstalled heat pump prices are high and opaque relative to equipment cost, but evidence on systematic markups beyond labor, permits and overhead is mostly anecdotal.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 1970-1975LBNL cites gross margins (overhead plus profit) averaging 47% of energy upgrade project costs, so materials, labor and equipment are roughly half of the total; this is business overhead, not proof of overcharging.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 185-194Wholesale heat pumps cost only $200-$500 more than equivalent ACs yet installs often cost more, partly because larger capacity and wiring are needed and partly because inexperienced installers may charge more to cover hassle and risk; no measure of markup over cost.

Installers can absorb heat pump rebates by raising their quotes

Leans partly right

Studies of energy-efficiency subsidies find some pass-through to sellers, but most rebate value usually reaches buyers.

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Asserts (1)Denies (0)Verdicts (1)

Heat Pumps are Not Hard: Here's what it will take to start pumping (Technology Connections)“Whatever savings the rebate might bring can simply evaporate if the installer builds it into the quote”
Leans partly right AI guessStudies of energy-efficiency subsidies find some pass-through to sellers, but most rebate value usually reaches buyers.

Widespread backup resistance heat in extreme cold strains the electric grid

Leans right

At 100% adoption, with supplemental heat modelled as resistance, cities covering 44% of the housing stock (mostly cold climates) see peak residential demand more than double.

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Asserts (1)Denies (0)Verdicts (4)

Heat Pumps: the Future of Home Heating (Technology Connections)“that can put an untenable strain on the electric grid.”
Probably right AI guessGrid operators see winter peaks driven by resistance backup heat in cold snaps, though grid failures like Texas 2021 had mainly supply-side causes.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 263-265Full adoption would substantially raise peak electricity demand in many areas, particularly with lower-efficiency units with electric resistance backup and no envelope upgrades.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 758-761At 100% adoption, with supplemental heat modelled as resistance, cities covering 44% of the housing stock (mostly cold climates) see peak residential demand more than double.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 2214-2224The authors warn that if setback-driven auxiliary heat became widespread, winter electricity peaks could require major grid infrastructure, and they observed 10-15 kW resistance snapback after demand-response events; this is a projection, not measured grid strain.

State and utility heat pump rebates were not affected by the 2025 federal budget law

Leans right

State and utility programs are funded separately (ratepayers, state budgets) and the budget law did not repeal them.

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Asserts (1)Denies (0)Verdicts (1)

Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“Your state and local programs and your utility company rebates were not touched by this federal law at all.”
Very likely right AI guessState and utility programs are funded separately (ratepayers, state budgets) and the budget law did not repeal them.

Heat pumps installed in 2025 can still get the federal credit on the 2025 tax return

Very likely right

IRS 25C page: the credit can be claimed for improvements made through December 31, 2025, and is claimed for the tax year the property is installed.

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Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“Work that was finished during 2025 still counts.”
Almost certainly right AI guessThe 25C repeal applies to property placed in service after 2025, so 2025 installations remain eligible on 2025 returns.
Very likely right IRS, the 25C home improvement credit lines 4-6IRS 25C page: the credit can be claimed for improvements made through December 31, 2025, and is claimed for the tax year the property is installed.
Probably right IRS 2025, end of the 25C and 25D credits lines 28-30IRS: the 25C credit is disallowed only for property placed in service after December 31, 2025, so a heat pump placed in service in 2025 remains eligible.

The federal 30% credit for geothermal heat pumps ended after 2025

Probably right

IRS: the 25D residential clean energy credit is not allowed for expenditures after December 31, 2025, and an expenditure counts only when installation is completed; geothermal heat pumps fall under 25D, though this fact sheet does not name them or the 30% rate.

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Home Energy Tax Credits 2026: What Expired and What's Left (The Rebate Report)“It also covered home battery storage systems, geothermal heat pumps, small wind systems, and more.”
Almost certainly right AI guessThe 25D residential clean energy credit, which covered geothermal heat pumps, ends for expenditures after December 31, 2025.
Probably right IRS 2025, end of the 25C and 25D credits lines 90-102IRS: the 25D residential clean energy credit is not allowed for expenditures after December 31, 2025, and an expenditure counts only when installation is completed; geothermal heat pumps fall under 25D, though this fact sheet does not name them or the 30% rate.

Home batteries charged off-peak pay back within a few years by cutting heat pump running costs

Leans wrong

Independent estimates of home battery payback from tariff arbitrage are typically closer to a decade, not a few years.

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Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“payback sometimes being as little as 2 to 4 years.”
Leans wrong AI guessIndependent estimates of home battery payback from tariff arbitrage are typically closer to a decade, not a few years.

Smart control apps that run a heat pump in cheap tariff hours cut its running costs substantially

Leans partly right

RMI finds that shifting load into cheap hours saves a lot for water heating ($154 to $48 a year in Houston) but only a few dollars a year for space heating, because a house cannot be overheated or hold heat like a tank.

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Heat Pumps vs Gas Boiler Running Costs... The TRUTH (Elite Renewables)“some of these apps claim to save you between 20 and 40% on your heat pump running costs.”
Leans partly right RMI 2018, the economics of electrifying buildings lines 954-962RMI finds that shifting load into cheap hours saves a lot for water heating ($154 to $48 a year in Houston) but only a few dollars a year for space heating, because a house cannot be overheated or hold heat like a tank.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 414-425UK Cosy-tariff households shifted large amounts of heat pump load into cheap hours, and about 70% of surveyed customers said they do it with smart thermostats or automation; the paper says automation makes shifting easy but cannot separate its effect from other mechanisms.
Unknown AI guessThe cited savings are vendor-reported and not independently measured.

In cold climates a heat pump sized for the cooling load cannot carry the full heating load

Leans right

Sizing for heating added about one ton over cooling sizing; for an example home a 2-ton (cooling-sized) unit would hand off to the furnace at 27F versus 14F for 3-ton and 5F for 4-ton.

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“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“heat pumps will not be able to carry the entire load of a house in cold climates”
Probably partly right AI guessSingle-speed units sized to cooling load fall short at design temperature, but variable-speed cold-climate units can be upsized for heating without short-cycling.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 458-463The minimum-efficiency unit sized for the cooling load has a much smaller heating capacity and relies on resistance heat when it cannot meet the load; design heating loads exceed cooling loads in about 70% of homes.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 677-697Sizing for heating added about one ton over cooling sizing; for an example home a 2-ton (cooling-sized) unit would hand off to the furnace at 27F versus 14F for 3-ton and 5F for 4-ton.

A dual-fuel system lets a smaller heat pump handle most heating while a furnace covers the coldest days

Leans right

Most heating hours occur at mild temperatures, so a heat pump sized below the design load still covers most of the season's heat.

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“Dual Fuel Heat Pumps are JUNK” 😬🔥 (The Thought Provocateur)“that 2ton heat pump will keep up with the heating load the majority of the time in Denver”
Very likely right AI guessMost heating hours occur at mild temperatures, so a heat pump sized below the design load still covers most of the season's heat.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 750-762With a properly sized ccASHP the backup furnace is expected to meet under 30% of the heating load, so a cheaper 80% AFUE furnace suffices since it runs only a small portion of the season.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 549-551Citing Waite and Modi, with dual-source heat pumps only 1-2% of heating energy may need to come from natural gas.

Many heat pump owners end up with high bills and a colder house

Leans wrong

Surveys of UK and US heat pump owners find satisfaction similar to or higher than gas boiler owners.

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This is Why Heat Pumps May NOT Be The Future (Skill Builder)“a lot of people are very disappointed after a couple of years of running and seeing their high electricity bills”
Probably wrong AI guessSurveys of UK and US heat pump owners find satisfaction similar to or higher than gas boiler owners.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 362-366Modelled bills rise in 39% of homes with minimum-efficiency units but only 5% with high-efficiency cold-climate units; comfort and indoor temperature are not assessed.
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1609-1617Some participants complained of higher bills, but about 75% kept or raised their satisfaction, average heating satisfaction rose from 3.61 to 3.88, and comfort and temperature-control problems were rare; this is a small, affiliated sample.

The UK Boiler Upgrade Scheme grant covers most of a typical air-source heat pump installation

Leans right

MCS data put the average UK air-source installation at £12,713 after the grant rose to £7,500, so the grant covered about 59% and left about £5,213 to the household.

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Heat Pumps Explained — And Tested | Guy Martin (Guy Martin)“costs around 11,000 pounds. With a grant of 7 and 1/2 thousand pounds”
Probably right AI guessThe £7,500 grant covers roughly half to two-thirds of typical UK air-source installation costs.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 561-568MCS data put the average UK air-source installation at £12,713 after the grant rose to £7,500, so the grant covered about 59% and left about £5,213 to the household.

Replacing an oil furnace with a heat pump pays back within a few years

Leans partly right

When an oil furnace needs replacing anyway, the incremental cost often pays back in about five to ten years, depending on oil prices and climate.

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What's the true cost of a heat pump? (Grist)“That means that in less than five years your heat pump will have actually paid for itself”
Leans partly right AI guessWhen an oil furnace needs replacing anyway, the incremental cost often pays back in about five to ten years, depending on oil prices and climate.
Leans wrong Deetjen 2021, private economics of US residential heat pumps lines 658-662Fuel-oil homes switching to a heat pump usually take a private economic loss over 15 years at 7%; adoption above 20% is unlikely in cold climates on cost alone.
Leans wrong RMI 2018, the economics of electrifying buildings lines 1341-1343At 2017 prices RMI finds electrification costs about the same as heating oil over 15 years (cheaper only than propane), which is not a payback within a few years.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 497-503Most oil-heated homes have positive unsubsidized NPV over 16 years with the minimum-efficiency unit, but that is lifetime value, not a payback within a few years.

Heat pump defrost cycles release meltwater that can ice driveways and walkways

Leans right

Defrost meltwater drains from the outdoor unit and can refreeze on paved surfaces in sub-freezing weather.

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Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! (The HVAC Veteran)“there is going to be water that's going to be around the system”
Very likely right AI guessDefrost meltwater drains from the outdoor unit and can refreeze on paved surfaces in sub-freezing weather.

Switching to a heat pump substantially lowers monthly energy bills

Leans wrong

Edwards finds 19% of households would pay more and 28% show no clear change with a heat pump, so substantial bill cuts are not general.

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Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! (The HVAC Veteran)“And they're going to really make a big difference on how much you're paying month over month.”
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 290-294Edwards finds 19% of households would pay more and 28% show no clear change with a heat pump, so substantial bill cuts are not general.
Leans wrong AI guessFor gas-heated homes, as most in Ontario are, measured bill savings are small or negative; large savings are mainly for oil, propane or resistance homes.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 796-801Minimum-efficiency units save only $100/yr on average and raise bills for 39% of households; high-efficiency units save $740/yr on average but still raise bills for 5%.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 1087-1127Every monitored site saved: ducted propane sites cut costs 28-40% ($377-$764/yr) and ductless resistance sites 52-54%; only propane and resistance baselines were tested, not gas.
Leans wrong Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1850-1863For UK households coming off gas boilers, running costs went slightly up (about £190/yr, or £83 net of the gas standing charge), not substantially down, against a pre-switch energy bill of about £2,200/yr.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 2700-2710LBNL: many electrification projects achieved large energy cost reductions, but some increased costs in high-rate states; savings depend on the fuel replaced and local rates (savings were mostly modeled, not metered).

HVAC equipment prices keep rising, so waiting to buy a heat pump costs more

Leans partly right

HVAC equipment prices rose sharply in 2021-2025 with inflation and the refrigerant transition, but future prices and incentives are uncertain.

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Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! (The HVAC Veteran)“they've been consistently going up in price every year, year after year after year.”
Leans partly right AI guessHVAC equipment prices rose sharply in 2021-2025 with inflation and the refrigerant transition, but future prices and incentives are uncertain.

Claiming a heat pump incentive requires proof that the installed equipment pairing meets the efficiency standard

Leans right

Federal and most utility incentives require the matched indoor and outdoor units to meet efficiency tiers, usually shown by an AHRI certificate.

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INFLATION Reduction Act Means MONEY for HVAC! (HVAC Guide for Homeowners)“make sure your contractor gets you the Ahri certificate”
Very likely right AI guessFederal and most utility incentives require the matched indoor and outdoor units to meet efficiency tiers, usually shown by an AHRI certificate.
Leans partly right IRS, the 25C home improvement credit lines 136-141IRS 25C page: heat pumps must meet the CEE highest efficiency tier (and from 2025 carry a qualified manufacturer QMID on the return), but the page does not specifically require proof of the matched indoor/outdoor pairing.
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 926-928Edwards says most incentives require installed heat pumps to meet performance and efficiency standards, but says nothing about documentation of the equipment pairing.

From 2023 through 2025 a federal tax credit covered part of the cost of a home energy audit

Very likely right

IRS 25C page: a home energy audit of the main home may qualify for a credit of up to $150 if it meets the written-report and qualified-auditor requirements.

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INFLATION Reduction Act Means MONEY for HVAC! (HVAC Guide for Homeowners)“homeowners can also get a credit up to 150 dollars for a qualified home energy audit”
Almost certainly right AI guessThe 25C credit included 30% up to $150 for a home energy audit through 2025.
Very likely right IRS, the 25C home improvement credit lines 87-96IRS 25C page: a home energy audit of the main home may qualify for a credit of up to $150 if it meets the written-report and qualified-auditor requirements.

Well-installed air-source heat pumps reach seasonal efficiencies around four in real homes

Leans wrong

Across 12 monitored central heat pumps in cold northwest US climates, seasonal compressor-based heating COP averaged 2.5 (1.7-3.5) and system COP 1.5-2.9; none approached four.

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Real Heat Pump Running Costs: A Full Year of Data From 5 Real Homes (Lloyd's Gas & Renewables)“this heat pump ran at a SCOP of 4.5 over the year.”
Leans wrong Winkler 2023 (NREL), cold-climate heat pump field validation lines 1823-1825Across 12 monitored central heat pumps in cold northwest US climates, seasonal compressor-based heating COP averaged 2.5 (1.7-3.5) and system COP 1.5-2.9; none approached four.
Leans partly right AI guessTop installs reach seasonal COPs near four, but large field trials such as the UK Electrification of Heat project measured medians closer to three.
Leans wrong CEE 2017, cold-climate heat pumps in Minnesota lines 1143-1157Heat-pump-only cycle COPs were about 1.3 at 10F and 3.0-4.5 only in shoulder seasons; weather-normalized annual heat-pump-only COPs were 2.51-2.78 at three Minnesota sites, well short of four.

A vetted-contractor program with negotiated pricing lowers heat pump installation costs

Leans right

LBNL: the CEE program's fixed contractor network working at pre-agreed costs 'reduces measure costs' and keeps comprehensive projects low-cost, and the PAYS program with fixed contractor networks and streamlined scopes also lowered costs (observational program comparison).

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Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“What the homeowners got out of that though was typically about a 20% discount on what they could have got on the street.”
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2606-2614LBNL: the CEE program's fixed contractor network working at pre-agreed costs 'reduces measure costs' and keeps comprehensive projects low-cost, and the PAYS program with fixed contractor networks and streamlined scopes also lowered costs (observational program comparison).
Unknown AI guessThe discount figure is self-reported by the program and not independently measured.

A properly sized inverter heat pump can heat a home at its design temperature without backup resistance heat

Leans partly right

Field reports show variable-speed units covering full load at moderate design temperatures, but not in very cold climates or leaky homes.

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Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“I caught my system on a 16 degree morning that was maintaining 70 on the stat and producing 17,640 BTUs”
Probably partly right AI guessField reports show variable-speed units covering full load at moderate design temperatures, but not in very cold climates or leaky homes.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 213-237The only two heat pumps sized above the design load met over 95% of the season heating load by compressor, but still used some auxiliary heat (lowering COP by under 7%), so not fully without backup.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1161-1168Sizing variable-speed and cold-climate units to the full design heating load is common practice in some programs, but for many homes duct airflow limits (about 3 tons) or the 5-ton maximum ducted size make it impractical without envelope upgrades.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1113-1120Variable-speed units sized with Manual J still used some auxiliary heat at 0-10 F at seven sites, partly because of setbacks; the appendix shows units sized near the load with resistance heat making up the gap to peak.

Inverter heat pumps defrost faster than single-stage heat pumps

Unknown

Defrost behaviour varies by control strategy; no independent comparison is widely available.

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Rewiring America Heat Pump Incentives: What You’re Missing! (Eric George | Home Performance Pro)“most people don't realize inverters defrost really well and pretty quickly as compared to a, you know, a standard conventional style”
Unknown AI guessDefrost behaviour varies by control strategy; no independent comparison is widely available.

Proper sizing from a load calculation matters more than brand

Leans partly right

Installation and sizing faults affect performance more than brand differences among major manufacturers, but evidence is mostly practitioner consensus.

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Heat Pumps in 2026 | What you should know (The Thought Provocateur)“The bottom line is that brand, in my opinion, is not as important”
Probably partly right AI guessInstallation and sizing faults affect performance more than brand differences among major manufacturers, but evidence is mostly practitioner consensus.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 2682-2689Lower-than-expected COPs were not consistently from certain manufacturers, while sizing explained the high auxiliary use; brand and sizing are not compared head to head.

The R-410A refrigerant phase-down does not require replacing a working system

Leans right

The AIM Act phase-down limits new equipment production; existing systems can still be serviced with R-410A.

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Heat Pumps in 2026 | What you should know (The Thought Provocateur)“if you have a 410A system, not to worry. You don't have to rush out and replace it right away.”
Almost certainly right AI guessThe AIM Act phase-down limits new equipment production; existing systems can still be serviced with R-410A.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 2045-2057EPA's HFC restrictions set GWP limits on newly manufactured systems for new construction and major retrofits (with installs of pre-2025 equipment allowed until 2026); they do not reach existing working systems.

A heat pump with an electric air handler costs less to install than a dual-fuel system with a furnace

Leans partly right

An air handler is usually cheaper than a furnace plus coil, but a dual-fuel retrofit that keeps a working furnace can cost less.

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Heat Pumps in 2026 | What you should know (The Thought Provocateur)“typically this is going to be more cost-effective because you don't have to have an added furnace and evaporator coil”
Probably partly right AI guessAn air handler is usually cheaper than a furnace plus coil, but a dual-fuel retrofit that keeps a working furnace can cost less.

Air-to-air heat pumps cost far less to install than air-to-water systems

Leans right

In the UK, ductless air-to-air installs typically cost a fraction of air-to-water systems with cylinders and radiator upgrades.

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Heat Pump Buyer's Remorse? This Alternative Works Better (Skill Builder)“a Daikin air-to-air heat pump with three indoor units, which has taken care of all of our heating needs for 5,300 pounds.”
Probably right AI guessIn the UK, ductless air-to-air installs typically cost a fraction of air-to-water systems with cylinders and radiator upgrades.

Geothermal heat pumps run best with little or no thermostat setback

Leans right

Manufacturers recommend minimal setback because recovery from deep setbacks can trigger backup heat and offsets savings.

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How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“Geothermal HVAC systems are best run with little to no temperature setback”
Probably right AI guessManufacturers recommend minimal setback because recovery from deep setbacks can trigger backup heat and offsets savings.

A geothermal desuperheater preheats domestic hot water using waste heat

Leans right

Desuperheaters recover compressor heat to preheat water, mainly during cooling season.

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How My Geothermal Heat Pump Really Performed (2 Years) (Undecided with Matt Ferrell)“This captures waste heat from the system and uses it to preheat water”
Very likely right AI guessDesuperheaters recover compressor heat to preheat water, mainly during cooling season.

Running a heat pump on emergency heat instead of the heat pump sharply raises electric bills

Leans right

Emergency mode runs only resistance heat at COP 1, roughly two to three times the cost of heat pump operation.

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What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“Running emergency heat all winter because a home owner thinks it's warmer is one of the most expensive mistakes I've seen”
Very likely right AI guessEmergency mode runs only resistance heat at COP 1, roughly two to three times the cost of heat pump operation.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 227-237Auxiliary resistance runs at COP 1 versus seasonal compressor COPs around 2.5, so heavy auxiliary use lowered overall system COP by more than 30% at Sites 2 and 8.

Backup heat should be sized to cover the gap at design temperature, not the full heating load

Leans partly right

ACCA guidance sizes supplemental heat to the shortfall, though some codes or owners want full emergency backup.

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What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? (HVAC Pro Blog)“You size supplemental heat to cover the supplemental load, not the full design load”
Probably partly right AI guessACCA guidance sizes supplemental heat to the shortfall, though some codes or owners want full emergency backup.

Geothermal heat pumps rarely pay back their extra cost over an efficient air-source heat pump

Leans partly right

With modern cold-climate air-source units, the running-cost gap is small relative to the installation premium unless incentives are large.

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Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“the efficiency you gain doesn't pay for itself over the life of the system which is the case in most situations”
Probably partly right AI guessWith modern cold-climate air-source units, the running-cost gap is small relative to the installation premium unless incentives are large.

In off-grid homes a geothermal heat pump can cost less overall by shrinking the solar and battery system needed

Unknown

Based on one builder's modelled costs, not independently measured.

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Geothermal heat pumps don''t make sense financially, so why do we always use them? (Battery Builds with Alan Knudson)“so the total system savings is 46 Grand as you know geothermal 20 to 25 grand extra this is a pretty good deal”
Unknown AI guessBased on one builder's modelled costs, not independently measured.

Inverter heat pumps keep far more of their heating capacity in cold weather than single-stage units

Leans right

AHRI performance data show variable-speed cold-climate units retaining 70-100% capacity at 5°F versus about half for basic single-stage units.

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$21k VS $7k Air Conditioner Heat Pump | Scam Or Real | HVAC Review (HVAC Talkshow and Review For Homeowners & DIY)“this one goes from 3 tons down to a little over two tons, while this one goes from 3 tons to a measly one ton.”
Very likely right AI guessAHRI performance data show variable-speed cold-climate units retaining 70-100% capacity at 5°F versus about half for basic single-stage units.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1127-1131The single-speed unit keeps 47% capacity at 5F and the cold-climate variable-speed unit 85%, but the premium variable-speed medium unit does not meet the 70% cold-climate criterion, so inverter alone does not guarantee it.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 433-436The Trane variable-capacity unit delivers 63% of design capacity at 5F, and the authors state a traditional ASHP without a variable-capacity compressor cannot reach that COP and capacity; not measured on single-stage units.

A premium inverter heat pump's energy savings repay its higher price over a basic single-stage system

Leans wrong

Medium and high-efficiency variable-speed units save more on bills, but their higher upfront costs cut positive unsubsidized NPV from 55% (minimum single-speed) to 41% and 21% (38% if high-efficiency costs are overestimated).

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$21k VS $7k Air Conditioner Heat Pump | Scam Or Real | HVAC Review (HVAC Talkshow and Review For Homeowners & DIY)“it's realistic that you could get your money back.”
Leans wrong AI guessPrice premiums of several times often exceed realistic energy savings over equipment life; payback depends heavily on climate and use.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 517-520Medium and high-efficiency variable-speed units save more on bills, but their higher upfront costs cut positive unsubsidized NPV from 55% (minimum single-speed) to 41% and 21% (38% if high-efficiency costs are overestimated).
Leans wrong Deetjen 2021, private economics of US residential heat pumps lines 813-818Greater heat pump efficiency has diminishing returns; at baseline cost, upgrading efficiency has little impact on the share of homes that benefit.

Variable-speed heat pumps dehumidify better than single-stage systems

Leans partly right

Longer low-speed run times can remove more moisture, but it depends on airflow settings and controls.

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$21k VS $7k Air Conditioner Heat Pump | Scam Or Real | HVAC Review (HVAC Talkshow and Review For Homeowners & DIY)“It wants to run, which means it will dehumidify better, filter the air better, and move the air around better.”
Probably partly right AI guessLonger low-speed run times can remove more moisture, but it depends on airflow settings and controls.

HVAC replacement prices rose sharply in recent years

Leans right

Producer price indexes and refrigerant transitions drove double-digit HVAC equipment and install price increases since 2020.

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Heat Pump & AC costs have SKYROCKETED 🚀 What you can do (The Thought Provocateur)“haven't gotten a bid on what it costs to replace an HVAC system in a few years you might be in for a surprise”
Very likely right AI guessProducer price indexes and refrigerant transitions drove double-digit HVAC equipment and install price increases since 2020.

Replacing HVAC equipment before it fails, in the off season, gets a lower price

Leans partly right

Planned replacement allows comparing bids and seasonal promotions, but discounts are anecdotal and vary.

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Heat Pump & AC costs have SKYROCKETED 🚀 What you can do (The Thought Provocateur)“by being proactive and replacing things in the off season oftentimes contractors will wheel and deal and give promotional shoulder season discounts”
Leans partly right AI guessPlanned replacement allows comparing bids and seasonal promotions, but discounts are anecdotal and vary.

Contractors discount replacing the furnace and air conditioner together

Unknown

Bundle pricing is a contractor practice with no independent data on its size.

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Heat Pump & AC costs have SKYROCKETED 🚀 What you can do (The Thought Provocateur)“a lot of companies will provide bundle deals if you're replacing both the furnace and air conditioner at the same time”
Unknown AI guessBundle pricing is a contractor practice with no independent data on its size.

From 2023 through 2025 a federal tax credit covered up to $600 of a high-efficiency central air conditioner

Very likely right

IRS 25C page: central air conditioners meeting the CEE highest non-advanced tier qualify as residential energy property for a credit of up to $600 per item.

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Heat Pump vs. Air Conditioner: Full Comparison and Breakdown (Yarbrough & Sons Heating, Cooling & Plumbing)“So, air conditioner has a maximum 25c tax credit of $600.”
Almost certainly right AI guessThe 25C credit allowed up to $600 for qualifying central air conditioners for 2023-2025 installs.
Very likely right IRS, the 25C home improvement credit lines 117-126IRS 25C page: central air conditioners meeting the CEE highest non-advanced tier qualify as residential energy property for a credit of up to $600 per item.

A low-cost ductless mini-split can heat a space in single-digit outdoor temperatures

Leans right

Many inexpensive inverter mini-splits are rated to operate below 5°F, though at reduced capacity.

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Mini-Split 2 Year Review | COLD CLIMATE (Jacob Shields)“we got 90° roughly of air coming out of the mini split and it is it is right now 9° outside”
Probably right AI guessMany inexpensive inverter mini-splits are rated to operate below 5°F, though at reduced capacity.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 934-938Standard (non-cold-climate) mini-splits with rated HSPF around 9-10 were observed operating below 0 F, at lower efficiency than cold-climate models; the report does not address price.

A home's true heating load can be estimated from smart thermostat runtime on a cold day

Leans right

Runtime-based load estimation is an established method for single-stage equipment, though less accurate for multistage or zoned systems.

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Old HVAC industry practices are holding us back and costing us money. But we can fix it. (Technology Connections)“All you need to do is find a day where it was extremely cold”
Probably right AI guessRuntime-based load estimation is an established method for single-stage equipment, though less accurate for multistage or zoned systems.

Heat pump installation prices will fall to match gas boilers as sales scale up

Unknown

The authors say heat pump learning rates are not established and UK evidence shows very small or zero price declines so far, possibly masked by inflation, constrained supply or harder homes, so whether prices will fall is open.

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Are Heat Pumps Really Worth It In 2026? (Artisan Electrics)“it's going to be, um, comparable to a gas boiler in no time at all and also more comfortable and save you money every year”
Unknown AI guessPrices have fallen in mature markets, but parity with gas boilers in the UK is a forecast, not an observed result.
Unknown Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 2075-2090The authors say heat pump learning rates are not established and UK evidence shows very small or zero price declines so far, possibly masked by inflation, constrained supply or harder homes, so whether prices will fall is open.

A gas furnace can run on a small generator during a power outage while a heat pump cannot

Leans right

A gas furnace's blower draws a few hundred watts, while a heat pump with strip heat needs several kilowatts at 240V.

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Heat Pump Vs. Furnace - Which is BETTER? (Atlas AC)“a small generator can easily power a furnace”
Probably right AI guessA gas furnace's blower draws a few hundred watts, while a heat pump with strip heat needs several kilowatts at 240V.

Replacing an old single-stage air conditioner with an inverter heat pump cuts cooling costs substantially

Leans partly right

Moving from SEER 13 to a high-SEER inverter unit can cut cooling energy roughly 25-40% on paper, but measured savings are often smaller.

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Heat Pump Tax Credits | Inflation Reduction ACT 🔥💰 (The Thought Provocateur)“on average we see about a 30 or 40% savings it is very drastic”
Leans partly right AI guessMoving from SEER 13 to a high-SEER inverter unit can cut cooling energy roughly 25-40% on paper, but measured savings are often smaller.
Leans partly right Guidehouse 2025, review of the MA and CT heat pump study lines 238-252In MA, a cooling-only central heat pump replacing existing central AC saves only about 69 kWh per ton a year and is not cost-effective (benefit-cost 0.14); hotter climates may differ.

Heat pumps heat radiators to lower temperatures than gas or oil boilers

Leans right

Standard air-to-water heat pumps run most efficiently at 35-55°C flow versus 60-80°C for typical boilers, though high-temperature models exist.

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The Trouble With Heat Pumps (Sabine Hossenfelder)“They might reach just about 50 degrees Celsius or so while a typical gas or oil heating reaches 70 degrees or more.”
Very likely right AI guessStandard air-to-water heat pumps run most efficiently at 35-55°C flow versus 60-80°C for typical boilers, though high-temperature models exist.

Surveys showing heat pump owners are as satisfied as gas boiler owners rely on unrepresentative samples

Leans partly right

The Nesta survey groups differed in property type and were self-selected, though monitored trials also report high satisfaction.

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The Trouble With Heat Pumps (Sabine Hossenfelder)“the heat pump owners we surveyed were demographically very different to the gas boiler owners”
Leans partly right AI guessThe Nesta survey groups differed in property type and were self-selected, though monitored trials also report high satisfaction.

Since mid-2026 the federal electric appliance rebate no longer pays to replace gas or oil heating with a heat pump

Very likely right

DOE Program Notice 26-2 (effective May 29, 2026) removes fuel-switching from the HEEHR (formerly HEAR) rebate, allowing HVAC rebates only for replacing existing electric equipment; launched programs must comply within three months, though existing reservations can still be honored.

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Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“Rebates are now allowed only for upgrading from existing electric equipment”
Very likely right DOE 2026, Program Notice 26-2 on electric home rebates lines 145-155DOE Program Notice 26-2 (effective May 29, 2026) removes fuel-switching from the HEEHR (formerly HEAR) rebate, allowing HVAC rebates only for replacing existing electric equipment; launched programs must comply within three months, though existing reservations can still be honored.
Very likely right North Carolina 2026, Energy Saver program changes lines 4-16North Carolina's state energy office: under DOE's May 29, 2026 guidance, from Sept. 1, 2026 HEAR rebates are no longer allowed for replacing gas or other fossil-fuel appliances; only electric-to-electric upgrades qualify.
Unknown AI guessThe source cites a May 2026 DOE program notice that could not be independently checked.

The federal whole-home efficiency rebate still pays toward a heat pump that replaces gas heating

Unknown

HOMES is fuel-neutral and performance-based by design, but state availability and any 2026 changes are unverified.

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Heat Pump Rebates: What Survived, and Who No Longer Qualifies (Owen Marsh)“There is no fuel test in the whole house program because it was never built around fuel.”
Unknown AI guessHOMES is fuel-neutral and performance-based by design, but state availability and any 2026 changes are unverified.

Most federal home energy tax credit claims went to higher-income households

Leans right

CRS and Treasury data show residential energy credits were disproportionately claimed by households with incomes above $100,000.

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Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“A lot of those folks were also higher earners.”
Very likely right AI guessCRS and Treasury data show residential energy credits were disproportionately claimed by households with incomes above $100,000.

Heat pumps outsell gas furnaces in the US

Leans right

AHRI shipment data show air-source heat pump shipments exceeding gas furnace shipments each year since 2022.

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Warming your house the green way just got more expensive | The Indicator (NPR's Planet Money)“heat pumps out sold gas furnaces for uh the fourth consecutive year”
Very likely right AI guessAHRI shipment data show air-source heat pump shipments exceeding gas furnace shipments each year since 2022.

Inverter heat pumps run quieter than furnaces and older air conditioners

Leans partly right

Inverter outdoor units are quiet at low speed, but comparing them with mostly indoor furnaces is not like-for-like.

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Heat pump myths 🤯😱 DO NOT believe them!! (The Thought Provocateur)“high-efficiency heat pumps, are drastically quieter than most furnaces”
Leans partly right AI guessInverter outdoor units are quiet at low speed, but comparing them with mostly indoor furnaces is not like-for-like.

Backup resistance heat strips use less electricity than letting the heat pump run longer to catch up

Leans wrong

The report says excessive auxiliary resistance runtime is costly and significant energy waste, to be minimized by proper heat pump sizing and controls (elsewhere it notes the auxiliary heater runs at COP 1).

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Why Heat Pumps are now leaving people COLD (Silver Cymbal)“it is much less electricity than just simply running your heat pump endlessly trying to make up a temperature”
Very likely wrong AI guessResistance strips have a COP of 1, so any heat the running heat pump can still supply costs less than the same heat from strips.
Leans wrong Winkler 2023 (NREL), cold-climate heat pump field validation lines 2084-2088The report says excessive auxiliary resistance runtime is costly and significant energy waste, to be minimized by proper heat pump sizing and controls (elsewhere it notes the auxiliary heater runs at COP 1).
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1531-1543When the heat pump could not catch up quickly after a setpoint change it brought on auxiliary heat, which the report says is less efficient and raises energy use and cost; it recommends avoiding such calls.

Canada's federal program pays up to $10,000 to switch oil-heated homes to a heat pump

Probably right

The federal Oil to Heat Pump Affordability Program pays up to $10,000 upfront for cold-climate air-source heat pumps (as of 2023; landlords and renters ineligible).

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Ottawa launches $2B rebate program for heat pump owners. But are they worth it? | Hanomansing Live (CBC News)“The rebate for households that switch to heat pumps is up to $10,000.”
Very likely right AI guessCanada's Oil to Heat Pump Affordability program offered up to $10,000 to eligible oil-heated households, with provincial top-ups in some regions.
Probably right Canadian Climate Institute 2023, heat pumps pay off lines 2013-2025The federal Oil to Heat Pump Affordability Program pays up to $10,000 upfront for cold-climate air-source heat pumps (as of 2023; landlords and renters ineligible).

Ductless heat pumps allow room-by-room temperature control

Leans right

Each ductless indoor head has its own controls, giving zoned heating and cooling.

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What are the Pros and Cons of Heat Pumps? (Monkey Wrench Plumbing, Heating, Air & Electric)“each indoor air handler is controllable to ensure that your family can attain their ideal Comfort”
Very likely right AI guessEach ductless indoor head has its own controls, giving zoned heating and cooling.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3509-3532Owners reported more control over individual rooms' temperatures as a main non-energy benefit, and some kept central systems precisely because mini-splits let them set points room by room.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 387-392Each indoor head of a mini-split warms or cools a single room or zone, and one outdoor unit serves up to four zones.

Heat pumps in mild climates can run without backup heat strips

Leans right

In mild southern climates a properly sized heat pump covers the design heating load without resistance backup.

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Converting a Furnace To A Heat Pump! (HVAC GUY)“They don't need heat strips.”
Very likely right AI guessIn mild southern climates a properly sized heat pump covers the design heating load without resistance backup.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 543-551Backup heating may not be needed in moderate climates such as southwestern British Columbia; the model includes it anyway to be conservative.

Replacing gas appliances with electric ones improves indoor air quality

Leans partly right

Unvented gas stoves measurably worsen indoor NO2 and are linked to asthma, but vented furnaces add little indoor pollution.

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Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained (Elephant Energy)“burning uh stuff indoors has on, you know, things like childhood asthma”
Leans partly right AI guessUnvented gas stoves measurably worsen indoor NO2 and are linked to asthma, but vented furnaces add little indoor pollution.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 775-778Electrification is listed as improving health outcomes by reducing lung irritants such as nitrogen dioxide and PM2.5; a stated co-benefit, not measured.

Load management or smart panels let most homes electrify on 100-amp service without a service upgrade

Leans partly right

Load calculations and power-limiting devices often avoid upgrades, but some homes still need them and code acceptance varies.

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Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“they can eliminate the expense of a service upgrade”
Probably partly right AI guessLoad calculations and power-limiting devices often avoid upgrades, but some homes still need them and code acceptance varies.
Unknown Wilson 2024 (NREL and LBNL), heat pumps for all? lines 859-864Whether existing dwellings can fully electrify without upgrading service panels is called an open question under ongoing research.

Backup resistance heat strips rarely run in a home with a heat pump

Leans wrong

Auxiliary resistance energy exceeded 40% of compressor heating energy at 5 of 11 all-electric sites and exceeded it at 2; every heat pump ran its auxiliary heater during or after defrost.

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Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“heat strips are rarely needed when you have a heat pump”
Leans wrong Winkler 2023 (NREL), cold-climate heat pump field validation lines 260-274Auxiliary resistance energy exceeded 40% of compressor heating energy at 5 of 11 all-electric sites and exceeded it at 2; every heat pump ran its auxiliary heater during or after defrost.
Leans partly right AI guessTrue in mild climates and with cold-climate units sized to the load; in cold climates with standard units backup heat runs a noticeable share of hours.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1169-1193Auxiliary heat was a small fraction of output overall and near zero in mild weather, but it appeared from about 30-35 F, made up a median 11% of heating energy at 5 F and ran 25% of the time at -10 to 0 F.

Replacing a hot-water boiler with a heat pump takes more work than replacing a forced-air furnace

Leans right

Hydronic systems need air-to-water units or new distribution and often larger emitters, raising cost and complexity.

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Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) (Technology Connections)“There are heat pumps which are designed to replace boilers, but they’ll be a bit more work”
Very likely right AI guessHydronic systems need air-to-water units or new distribution and often larger emitters, raising cost and complexity.

In a new build a heat pump costs little more than a gas boiler, and skipping a gas connection can make it cheaper

Leans partly right

New builds avoid retrofit work and may avoid a gas connection, but the saving depends on the connection cost and design.

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The TRUE Payback Time for Heat Pumps (Heat Geek)“it's probably much cheaper in most cases to have a heat pump than it is gas boiler in a new build”
Probably partly right AI guessNew builds avoid retrofit work and may avoid a gas connection, but the saving depends on the connection cost and design.
Leans right RMI 2018, the economics of electrifying buildings lines 426-429RMI finds heat pumps usually the lowest-cost option in new construction because one device replaces furnace and AC, with avoided gas mains and service (median $8,800 per home) adding to the advantage.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1873-1877In Canadian modelling, heat pumps with electric backup are already the lowest lifetime-cost option in all new builds in Vancouver, Montreal and Halifax and for new detached homes in Toronto; this compares lifetime cost against gas plus AC, not upfront cost against a boiler.

Payback should count only a heat pump's extra cost over the system you would replace anyway

Leans right

Standard incremental-cost analysis compares against the replacement you would buy anyway when equipment is due.

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The TRUE Payback Time for Heat Pumps (Heat Geek)“deduct the cost of what you would have spent replacing your boiler with a newer model”
Very likely right AI guessStandard incremental-cost analysis compares against the replacement you would buy anyway when equipment is due.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 500-506The study counts only the extra cost of a heat pump over replacing the existing heater with a similar one, assuming purchase at end of the old heater's life.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 709-716Wilson's consumer economics compare heat pump installation with a reference scenario of like-for-like replacement of equipment at end of lifetime, and find a majority of households can benefit against that reference; the shares are therefore the replacement-time case, not early replacement of working equipment.

Most of a retrofit heat pump's cost is installation labour and radiators, so prices will fall little with scale

Leans partly right

Labour and soft costs dominate retrofit prices, but countries with mature markets show those costs can fall with scale and standard designs.

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The TRUE Payback Time for Heat Pumps (Heat Geek)“the vast majority of work is putting in pipe and installing radiators”
Leans partly right AI guessLabour and soft costs dominate retrofit prices, but countries with mature markets show those costs can fall with scale and standard designs.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1326-1327For US ductless heat pumps, labour is commonly 30-35% of total cost (radiators do not apply to air-to-air systems).

A heat pump beats gas on running cost only when its COP exceeds the electricity-to-gas price ratio

Probably partly right

The break-even seasonal COP is the electricity-to-gas price ratio times the furnace AFUE (US 2024: 3.45 x 0.95 = 3.28), so the threshold is slightly below the raw price ratio.

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How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“to get a heat pump to match the cost of gas it needs to have a cop of four”
Almost certainly right AI guessBreak-even follows directly from energy prices per kWh and the furnace's efficiency; it is a standard calculation.
Probably partly right EIA, state residential electricity and gas prices lines 123-131The break-even seasonal COP is the electricity-to-gas price ratio times the furnace AFUE (US 2024: 3.45 x 0.95 = 3.28), so the threshold is slightly below the raw price ratio.
Leans partly right Edwards 2024, inequities in heat pump bill savings lines 653-672Edwards computes savings as fuel price times load divided by furnace efficiency, minus electricity price times load divided by heat pump COP, so the break-even COP is the price ratio multiplied by furnace efficiency, not the bare price ratio.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3372-3384The crossover equation sets the heat pump's cost per delivered Btu (electricity price over COP) equal to the gas cost (gas price over furnace efficiency), so the threshold is the price ratio times furnace efficiency, not the bare price ratio.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 1071-1075In the UK the electricity-to-gas price ratio was about 4.1 while the heat pump used roughly a third of the gas energy it displaced, and running costs came out £190/yr higher, consistent with the ratio rule.

Landlords who don't pay utility bills have little reason to install efficient heating

Leans right

The split-incentive problem in rentals is well documented: owners who don't pay bills underinvest in efficiency.

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How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) (Technology Connextras)“they will always take the cheap option because that's in their best interest”
Very likely right AI guessThe split-incentive problem in rentals is well documented: owners who don't pay bills underinvest in efficiency.
Leans right Edwards 2024, inequities in heat pump bill savings lines 238-243Edwards frames renter split incentives as a barrier and finds a 10% rise in rented units in a tract cuts the odds of heat pump use by 4%, though the RECS replication did not confirm the renter effect.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1633-1640Renters usually pay energy bills while landlords pay for heating systems, so landlords have limited incentive to invest in a heat pump whose savings go to tenants (an argument, not a measurement).

A high-efficiency system pays back only if you stay in the home long enough to recoup its extra cost

Leans right

Savings accrue yearly, so a short ownership period may not recover a premium unless it is reflected in the sale price.

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Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“you will have a long enough Break Even period to recoup these costs”
Very likely right AI guessSavings accrue yearly, so a short ownership period may not recover a premium unless it is reflected in the sale price.

Replacing equipment like-for-like is the cheapest installation option

Leans right

Switching system types adds gas lines, circuits or ductwork changes, so like-for-like swaps usually cost least upfront.

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Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 (The Thought Provocateur)“the cheapest option will always be swapping your existing unit with a like for light replacement”
Very likely right AI guessSwitching system types adds gas lines, circuits or ductwork changes, so like-for-like swaps usually cost least upfront.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 451-457Efficient heat pumps cost far more than like-for-like replacement, but a minimum-efficiency heat pump averaged $9,000 versus $11,000 for like-for-like furnace plus AC in cold-climate ducted homes with central AC.

Real-world heat pump efficiency is lower than manufacturers' rated figures

Probably right

Directly metered seasonal efficiencies of 152 mini-splits fell below their rated values on average, though some units met or exceeded their ratings; the evaluators blame usage patterns and test conditions, not misrated equipment.

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Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill (Future Power)“Manufacturer claims of 4.0 to 5.0 are lab numbers, not a British winter.”
Very likely right AI guessField trials (e.g. UK EoH, US monitoring) usually measure seasonal COPs below rated values, though good installs approach them.
Probably right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1073-1079Directly metered seasonal efficiencies of 152 mini-splits fell below their rated values on average, though some units met or exceeded their ratings; the evaluators blame usage patterns and test conditions, not misrated equipment.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 241-252Steady-state COPs at 7 of 12 sites matched manufacturer values while the other 5 were lower, and measured capacity aligned with maximum rated capacity at only 5 of 12 sites.
Leans wrong CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 413-419Installed furnace efficiencies ran below rating, but the heat pumps' rated COPs at 17F were within the measurement error of the field data at all sites; small sample.

Heat pump prices vary mainly with system size and efficiency tier

Leans right

Capacity and efficiency tier drive equipment price, though installation complexity and contractor also move quotes.

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How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“between $8,000 and $23,000 just depending on the size of your home and the efficiency level that you opt for”
Probably right AI guessCapacity and efficiency tier drive equipment price, though installation complexity and contractor also move quotes.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 3082-3111LBNL: ductless heat pump cost scaled near-linearly with capacity, but per-ton cost did not rise with HSPF or SEER and efficiency 'does not appear to be a strong driver of installed cost'; so size yes, efficiency tier no.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1434-1443Central heat pump cost was regressed on tons and HSPF, but for ductless units rated efficiency had no significant effect, swamped by existing equipment, electrical work, manufacturer and installer margins.
Leans wrong Canadian Climate Institute 2023, heat pumps pay off lines 1163-1168From manufacturer price feedback, the report finds much of the variation in heat pump cost is brand-related and also reflects regional supplier constraints, not mainly size or efficiency tier.

Major heat pump brands carry 10-year parts and compressor warranties

Leans right

Leading US brands offer 10-year limited parts warranties, usually conditional on registration.

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How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why (Yarbrough & Sons Heating, Cooling & Plumbing)“we're going to have a 10-year parts, 10-year compressor, and a uh 10-year indoor warranty”
Very likely right AI guessLeading US brands offer 10-year limited parts warranties, usually conditional on registration.

DIY-installable heat pumps cost far less than contractor-installed systems

Leans partly right

Pre-charged DIY units avoid much of the labour cost, but sizing, permits, warranty terms and electrical work limit the saving.

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Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips (HouseBarons)“the price of mr cool and its installation was dramatically less than the quotes that we had”
Probably partly right AI guessPre-charged DIY units avoid much of the labour cost, but sizing, permits, warranty terms and electrical work limit the saving.

Skipping heat pump maintenance raises its running costs

Leans right

Dirty coils and filters and wrong charge measurably reduce heat pump efficiency in field studies.

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Top 3 Heat Pump ISSUES in Winter! (HVAC Guide for Homeowners)“poor airflow can cause your utility bills to spike”
Very likely right AI guessDirty coils and filters and wrong charge measurably reduce heat pump efficiency in field studies.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3259-3272Filters ran from clean to moderately dirty; one extreme filter cut fan airflow by 69%, but in testing even a very dirty filter shifted the airflow curve less than 10% versus clean, a small effect for typical neglect.

If you are keeping a working furnace, a new air conditioner costs less upfront than a heat pump

Leans right

Edwards' national installed-cost medians are $4,684 for a central AC and $6,185 for a heat pump of the same size.

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AC vs. Heat Pump: Which is Better for Your Home? | Comprehensive Comparison (Monkey Wrench Plumbing, Heating, Air & Electric)“if you're looking to replace your cooling system and keep your furnace, then a new air conditioner is ideal”
Very likely right AI guessAn AC is usually somewhat cheaper upfront, though a heat pump paired with the furnace adds dual-fuel savings for a modest premium.
Leans right Edwards 2024, inequities in heat pump bill savings lines 1838-1854Edwards' national installed-cost medians are $4,684 for a central AC and $6,185 for a heat pump of the same size.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 185-186Wholesale heat pumps cost $200-$500 more than equivalently sized air conditioners.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 1360-1375In the NREL cost database the efficient AC is cheaper than the efficient heat pump ($5,180 vs $5,550), but at base efficiency the heat pump is slightly cheaper ($2,994 vs $3,164).

Heat loss calculations for the same home can differ widely between surveyors

Leans right

Surveys rely on assumed U-values and ventilation rates, and comparisons of assessors show a wide spread for the same house.

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I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“the heat loss this time was something around 7 and 1/2 kW, so quite different to the Octopus one.”
Probably right AI guessSurveys rely on assumed U-values and ventilation rates, and comparisons of assessors show a wide spread for the same house.

A heat pump hot water cylinder gives a more limited hot water supply than a combi boiler

Leans right

A cylinder stores a fixed volume and a heat pump reheats it more slowly than a combi boiler heats water on demand.

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I Tried Getting a Heat Pump… Here’s What Actually Happened (Gary Does Solar ☀️)“we have noticed that it can run out of hot water, and so you have to wait an hour or something like that.”
Probably right AI guessA cylinder stores a fixed volume and a heat pump reheats it more slowly than a combi boiler heats water on demand.

Two-stage or variable-capacity heat pumps can be sized for heating without short cycling in cooling season

Leans right

Multi-stage and inverter units run at reduced capacity for cooling, limiting the short cycling and humidity problems of heating-based sizing.

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HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“variable capacity means someone can oversize for heating and it won't be a problem in the summer”
Probably right AI guessMulti-stage and inverter units run at reduced capacity for cooling, limiting the short cycling and humidity problems of heating-based sizing.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 694-697Authors state sizing one ton larger for heating is not a concern because variable capacity lets the heat pump match the smaller cooling load by running at lower output; cooling cycling was not measured.

Inverter-driven heat pumps run long low-output cycles, which is easier on the compressor than short cycling

Leans right

Fewer starts reduce compressor wear and cycling losses; inverter units modulate to match load.

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HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“modern inverter driven equipment of the fancier variety strives to never stop it will just slow down the compressor to match loading”
Probably right AI guessFewer starts reduce compressor wear and cycling losses; inverter units modulate to match load.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 1412-1428Ducted ccASHPs generally ran at low capacity for long periods and rarely fired at maximum; compressor wear was not studied.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 254-258Despite variable-capacity compressors, the heat pumps were off for a significant fraction of the time at temperatures where continuous running was expected (thermostat schedules or controls); compressor wear was not studied.
Leans partly right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1327-1366Variable-speed modulation allows longer cycles than single-speed on/off cycling, and median heating cycles at 5-30 F ran 50-200 minutes, but some sites mostly cycled under 10 minutes; compressor wear was not studied.

A smaller furnace running longer uses about the same fuel as a larger one cycling on and off

Leans right

Fuel use is set by heat delivered and AFUE, not runtime; cycling losses make oversized units only slightly worse.

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HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“a furnace which runs for twice as long because it's half the capacity is using the exact same amount of energy”
Very likely right AI guessFuel use is set by heat delivered and AFUE, not runtime; cycling losses make oversized units only slightly worse.

Most gas furnaces also stop heating during a power outage

Leans right

Modern furnaces need electricity for ignition, inducer and blower, so they stop in an outage without backup power.

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HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) (Technology Connextras)“my gas furnace doesn't work when the power is out”
Almost certainly right AI guessModern furnaces need electricity for ignition, inducer and blower, so they stop in an outage without backup power.

State-run HEAR heat pump rebate funds can be exhausted soon after launch

Leans right

HEAR allocations are capped per state and several programs, including Colorado, reported funds committed within months of launch.

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Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“as of April 28th, the zone one funds are fully allocated. This went so fast”
Probably right AI guessHEAR allocations are capped per state and several programs, including Colorado, reported funds committed within months of launch.

Heat pump rebate programs involve heavy paperwork and long payment delays

Leans right

Program descriptions and contractor reports show multi-step applications and approval or payment queues of weeks.

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Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“On our end, it's hours hours of work and paperwork and calculations and everything, photos, geotag photos”
Probably right AI guessProgram descriptions and contractor reports show multi-step applications and approval or payment queues of weeks.
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 1532-1549Canadian heat pump programs are complex and cumbersome: they vary by government, often require audits paid out of pocket, and pay out only after installation, and the administrative burden has been shown to hold households back (Canada only).

Heat pump rebates from utility, state and local programs can be stacked

Leans right

DOE highly recommends that states stack and braid HEEHR rebates with other programs and funding sources, but the statute bars combining them with another federal grant or rebate for the same project.

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Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“They do stack on each other like you said”
Very likely right AI guessUtility, state and local rebates are often combinable, subject to caps such as the HEAR per-household limit.
Leans right DOE 2026, Program Notice 26-2 on electric home rebates lines 262-274DOE highly recommends that states stack and braid HEEHR rebates with other programs and funding sources, but the statute bars combining them with another federal grant or rebate for the same project.
Leans right National Housing Trust 2026, state rebate tracker lines 610-613West Virginia designed its federal rebates to stack with the state weatherization program and local utility rebates (New Jersey plans the same with its Clean Energy Program); these are plans for a few states, not a general rule.

Colorado offers a state tax credit for heat pumps installed in 2026

Leans right

Colorado's state heat pump credit continued into 2026 at a reduced amount under the state schedule.

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Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“this is still in play for the full year 2026. It it got lowered 50% from from 2025. So now it's $1000 per home”
Very likely right AI guessColorado's state heat pump credit continued into 2026 at a reduced amount under the state schedule.

Zero-percent HVAC dealer financing builds its cost into the equipment price

Leans partly right

Dealer-fee financing is commonly priced into the installed cost, though not every promotional offer raises the price.

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Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) (Just Heat Pumps)“the zero down things, the 0% Someone's paying for that and it's usually rolled into the homeowners cost”
Probably partly right AI guessDealer-fee financing is commonly priced into the installed cost, though not every promotional offer raises the price.

Even in cold weather a heat pump delivers more heat per unit of energy than a fossil-fuel furnace

Leans right

Heat-pump-only cycles kept COP about 1.3 even at the 10F change point, while measured propane furnace cycles ran about 57-85% efficient.

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Are Heat Pumps a Scam? (Undecided with Matt Ferrell)“So even when heat pumps have to work harder in colder climates, you’re still getting better performance than you would with fossil fuels.”
Probably partly right AI guessWith a COP above 1 a heat pump delivers more heat per unit of site energy than a furnace, but per unit of primary energy or cost the edge narrows or reverses in deep cold.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 1143-1179Heat-pump-only cycles kept COP about 1.3 even at the 10F change point, while measured propane furnace cycles ran about 57-85% efficient.
Leans right RMI 2018, the economics of electrifying buildings lines 966-970RMI's cold-climate heat pump keeps a site COP of 1.4 at -13F, above the 0.85-0.95 efficiency it assumes for fossil furnaces (site energy, not primary energy).
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 2926-2935Field COPs averaged about 1.5 at -10 to 0 F, while the report puts fuel heating's equivalent COP at its system efficiency of 0.7 to 0.9; this holds per unit of site energy, not counting power-plant losses.
Leans right PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 180-189A median COP of 1.9 at 0-5 F (1.6-2.7 below 30 F) beats any furnace's site efficiency below 1.0; this compares site energy only and comes from pre-commercial prototypes.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 157-163Cold-climate units keep COP of 2 or more at 5F, beating any furnace, but when the load exceeds capacity backup resistance at COP 1 takes over.

A heat pump can often reuse a home's existing radiators and pipework with few changes

Leans partly right

Many UK homes need some radiator upsizing for low flow temperatures, but whole-system replacement is often unnecessary.

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Heat Pumps In Winter ££££!!! - The Running Costs! (Electric Vehicle Man)“We only had to replace a few radiators as the previous video will tell you”
Probably partly right AI guessMany UK homes need some radiator upsizing for low flow temperatures, but whole-system replacement is often unnecessary.

Basic single-stage heat pumps are rated for heating only down to around freezing

Leans partly right

Single-speed heat pumps still produce heat below freezing but lose capacity quickly and usually need backup below balance points around 25-35°F.

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Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“most single stage 14 Seer or 16 Seer heat pumps are only graded down to 25 or 30 degrees Fahrenheit”
Probably partly right AI guessSingle-speed heat pumps still produce heat below freezing but lose capacity quickly and usually need backup below balance points around 25-35°F.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 1072-1078The modelled minimum-efficiency single-speed heat pump keeps 47% of rated capacity at 5F and runs down to 0F, based on lab test data.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 716-722Installers lock out non-cold-climate ASHPs at about 25-35F because capacity, efficiency and supply air temperature are unfavourable below that; this is practice, not a rating limit.

SEER and HSPF ratings do not fully capture a heat pump's real-world efficiency

Probably right

The report lists why measured SEER/HSPF fell short of ratings: test conditions (e.g. 80 F return air) do not represent real operation, plus cold-weather use, low-load operation, dry and fan modes, and long defrost periods.

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Heat pumps and COLD WEATHER 🥶🔥 (The Thought Provocateur)“some systems may have lower hspf or Seer ratings but actually be more efficient”
Probably right AI guessSEER2 and HSPF2 are test-condition averages that understate cold-climate differences; low-ambient COP data add information.
Probably right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1085-1103The report lists why measured SEER/HSPF fell short of ratings: test conditions (e.g. 80 F return air) do not represent real operation, plus cold-weather use, low-load operation, dry and fan modes, and long defrost periods.
Leans right Winkler 2023 (NREL), cold-climate heat pump field validation lines 224-237Field COPs at 5 of 12 sites fell below manufacturer-reported values, and auxiliary heat (COP 1) cut overall system COP by over 30% at two sites, effects ratings do not capture.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 413-419Rating tests such as AFUE and HSPF are run at fixed conditions to compare units and are not meant to represent installed efficiency, though the heat pumps' rated 17F COPs were within measurement error of field data.

Installing a mini-split yourself saves thousands of dollars over a professional install

Leans partly right

Self-installing avoids labour markup, but refrigerant handling and warranty terms often require a licensed technician.

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I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“doing it DIY, you saved $4,967.”
Probably partly right AI guessSelf-installing avoids labour markup, but refrigerant handling and warranty terms often require a licensed technician.

Homes in places with temperature extremes need a secondary heat source alongside a mini-split

Leans right

The ductless unit's capacity fell to about 20% of rated below -20F, and the authors conclude these units should not be used without backup at extreme temperatures (below -15F).

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I Installed a DIY Mini-Split—Here's What It Cost to Run (I Like To Build Stuff)“your home should have a secondary heating and cooling source, like electric baseboard heaters, a furnace, or even a portable air conditioner”
Probably partly right AI guessCold-climate units cope alone in many places, but backup heat is common practice where design temperatures fall below the unit's rated range.
Leans right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 478-489The ductless unit's capacity fell to about 20% of rated below -20F, and the authors conclude these units should not be used without backup at extreme temperatures (below -15F).
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3209-3211Mini-splits supplied only about 14% of installed heating capacity and nearly always ran alongside another system as secondary or spot heating; this reflects how they were sized and used, not proof that one could not carry the load.

Most heating hours occur at moderate temperatures where heat pumps run most efficiently

Leans right

Bin-hour weather data show most heating hours fall at moderate temperatures, so seasonal COP sits closer to the mild-weather figure.

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Heat Pump Economics in Massachusetts (Abode Energy Management)“how is that heat pump performing really between here and here where we do have the most amount of hours”
Very likely right AI guessBin-hour weather data show most heating hours fall at moderate temperatures, so seasonal COP sits closer to the mild-weather figure.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1965-1969In Massachusetts/Rhode Island, very few winter hours fell below 0 F and the median winter hour was about 30 F (2015) or 38 F (2016), so most heating happens well above the cold extremes where efficiency is worst.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 704-709With a 10F changeover a heat pump meets 71% of the heating load in Duluth and 81% in Minneapolis, so most heating load falls at temperatures above 10F where the heat pump runs.

Heat pumps need a correct refrigerant charge and a matched indoor coil to run efficiently

Leans right

Lab and field studies show refrigerant charge errors and mismatched coils cut heat pump capacity and efficiency, more so in heating.

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Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know (Yarbrough & Sons Heating, Cooling & Plumbing)“in a heat pump it is very crucial that we have the correct charge on there”
Very likely right AI guessLab and field studies show refrigerant charge errors and mismatched coils cut heat pump capacity and efficiency, more so in heating.

Outdoor heat pump units in cold climates must sit above the snow line

Leans right

Manufacturers require raised mounting in snowy climates so snow does not block airflow and defrost water can drain.

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Dual Fuel HVAC | This Old House (This Old House)“In a cold climate like this, we've got to make sure it's above the snow line”
Very likely right AI guessManufacturers require raised mounting in snowy climates so snow does not block airflow and defrost water can drain.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3276-3285Field staff found many outdoor units mounted with too little clearance, where roof melt and defrost water could freeze and impair the fan, and the manufacturer's guidance implies about four inches; this supports raised mounting but gives no 'snow line' rule.

The best heat pump lockout or balance-point temperature differs for every home

Leans right

The balance point depends on the home's heat loss and the unit's capacity curve, both of which vary by house.

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Heat Pump SHUT OFF Temp with AUX HEAT! (HVAC Guide for Homeowners)“there is no cookie cutter answer when we're talking about balance point”
Very likely right AI guessThe balance point depends on the home's heat loss and the unit's capacity curve, both of which vary by house.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 716-727The changeover temperature depends on house load and system size; the project chose 10F for warmer metro/southern homes and 5F for colder ones, targeting about 80% of load met.

Heat pumps that need no backup heat at all are coming to market

Leans partly right

Some cold-climate units are installed without strips in moderate climates, but most cold-region installs still include backup heat.

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Heat Pump SHUT OFF Temp with AUX HEAT! (HVAC Guide for Homeowners)“you're going to see more and more systems on the market that don't have any backup heat at all”
Leans partly right AI guessSome cold-climate units are installed without strips in moderate climates, but most cold-region installs still include backup heat.

Most heat pumps are installed or sized improperly

Leans partly right

DOE and NIST field studies find most residential HVAC systems have at least one installation fault, though not all faults materially hurt performance.

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The Truth About HVAC Scams & Heat Pump Hype | Handy Bros. CEO Sets the Record Straight (Handy Bros. Home Comfort)“the majority of heat pumps installed today are installed and sized improperly”
Leans partly right AI guessDOE and NIST field studies find most residential HVAC systems have at least one installation fault, though not all faults materially hurt performance.
Leans partly right Winkler 2023 (NREL), cold-climate heat pump field validation lines 1131-1139Five of the audited heat pumps were judged undersized for the design load, two of them severely, but this is a small preselected sample of high-efficiency installs.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3177-3186The evaluators judged it unlikely that contractors used Manual J or even a floor-area rule of thumb, since capacities barely correlated with load; units were roughly 2x the cooling load and about half were short on heating, but this covers supplemental mini-splits in one program.

Heat pump incentives have drawn inexperienced installers into the market

Leans partly right

Program evaluations report quality problems from new entrants during incentive surges, but systematic data are thin.

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The Truth About HVAC Scams & Heat Pump Hype | Handy Bros. CEO Sets the Record Straight (Handy Bros. Home Comfort)“there has been companies that pop up overnight and are out there installing heat pumps”
Leans partly right AI guessProgram evaluations report quality problems from new entrants during incentive surges, but systematic data are thin.

Heat pumps are easier than furnaces to size to the small heating loads of efficient homes

Leans right

Small inverter heat pumps and mini-splits come in capacities well below the smallest common furnaces.

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The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“it’s easier and less expensive to get a heat pump small enough to match the loads of a high performance home”
Leans right AI guessSmall inverter heat pumps and mini-splits come in capacities well below the smallest common furnaces.

Comparing heat pump and gas running costs requires converting both to cost per delivered unit of heat

Leans right

The evaluators compare systems by the price per delivered Btu, combining each fuel's price, heat content and the appliance's efficiency (COP for the heat pump, AFUE for the furnace).

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The Shocking Truth About Heat Pumps - Energy Vanguard (Energy Vanguard)“find out how many cents per Btu you pay for each fuel, with the equipment efficiency factored in.”
Leans right AI guessFuel prices are billed in different units, so a fair comparison converts both to cost per delivered Btu including equipment efficiency.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3372-3384The evaluators compare systems by the price per delivered Btu, combining each fuel's price, heat content and the appliance's efficiency (COP for the heat pump, AFUE for the furnace).
Leans right EIA, state residential electricity and gas prices lines 119-125The comparison converts both fuels to $/MMBtu and divides by AFUE or seasonal COP to get cost per MMBtu of delivered heat.

Standard volumetric electricity rates overcharge heat pump owners for grid delivery costs

Leans partly right

In summer-peaking systems winter load adds little grid cost, so volumetric delivery charges overcharge heat pumps, but this fades as grids turn winter-peaking.

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New winter rates saved at least $37M for Massachusetts heat-pump… (Canary Media)“The logic behind these discounts is that traditional electricity rates overcharge heat pump owners for their share of grid construction and upkeep.”
Leans partly right AI guessIn summer-peaking systems winter load adds little grid cost, so volumetric delivery charges overcharge heat pumps, but this fades as grids turn winter-peaking.

Heat pumps using the phased-out R-410A refrigerant will cost more to repair as its supply shrinks

Leans partly right

The AIM Act phasedown has raised R-410A prices, but reclaimed supply will keep existing units serviceable for years.

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Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog (Energy Rebate Calculator)“R-410A will become increasingly expensive and difficult to source as the phasedown advances, affecting future repair costs.”
Leans partly right AI guessThe AIM Act phasedown has raised R-410A prices, but reclaimed supply will keep existing units serviceable for years.

Cold-climate heat pumps are suitable for every US climate

Leans partly right

Cold-climate ASHPs proved beneficial in typical Minnesota homes, one of the coldest US climates, but needed backup heat, and the ductless unit should not be used without backup below -15F.

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Cold Climate Heat Pumps: Everything You Need to Know - Trane® (Trane Residential)“Trane’s heat pumps for cold climates are suitable for all areas of the United States.”
Leans partly right AI guessCold-climate units heat most US homes, but in climate zones 7-8 they usually need backup heat.
Leans partly right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 486-501Cold-climate ASHPs proved beneficial in typical Minnesota homes, one of the coldest US climates, but needed backup heat, and the ductless unit should not be used without backup below -15F.

High installation costs keep heat pumps from paying off for many households

Probably right

Higher upfront costs cut positive unsubsidized NPV to 41% and 21% for the more efficient units despite bigger bill savings; cost reductions are needed for almost half of households.

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Here's how to take the sting out of the cost of installing a heat pump (Electrek)“Heat pumps may only be financially feasible for a smaller portion of households due to high installation costs.”
Probably right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 517-520Higher upfront costs cut positive unsubsidized NPV to 41% and 21% for the more efficient units despite bigger bill savings; cost reductions are needed for almost half of households.
Leans right AI guessNREL's 2024 study found bill savings for most homes but positive net present value for far fewer once installation cost is counted.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 919-923Small reductions in capital cost could greatly increase economic adoption rates, which are limited to 21% of houses at current costs.
Leans right RMI 2018, the economics of electrifying buildings lines 158-161RMI finds gas customers face higher upfront retrofit costs, and in Houston and Oakland the energy savings are too small to make up the extra capital.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 1376-1383At $9,450 installed, a ccASHP with propane backup had a lifetime savings-to-investment ratio of 0.63 against a condensing furnace (does not pay off) but 1.24 against an 82% furnace.
Leans partly right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 2019-2024In the UK the heat pump's net private cost after the grant is about £4,121 over 20 years on a standard tariff (it does not pay off), but switching to the heat pump time-of-use tariff is worth about £4,675, which more than covers it.
Leans partly right Canadian Climate Institute 2023, heat pumps pay off lines 1202-1208In some Canadian regions heat pumps win on lifetime cost only with current rebates and carbon pricing, especially under high upfront-cost assumptions, while elsewhere they win even without support.
Leans partly right Less 2021 (LBNL), cost of decarbonization retrofits lines 134-139LBNL: even the cheapest deep path (heat pump electrification with PV and weatherization, about $54k) needed about $20k of cost cuts to break even monthly; this applies to whole retrofit packages, not a heat pump alone.

Ductless heat pumps cut energy costs compared with ducted forced-air systems

Leans partly right

Ductless systems avoid duct losses, which are large when ducts run through unconditioned space, but vendor savings figures are not independently measured.

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How a Ductless Heat Pump Can Save You Money and Energy | Mitsubishi Electric HVAC US (mitsubishicomfort.com)“Ductless heating and air conditioning systems can save 30-40 percent off the energy costs of a forced air system.”
Leans partly right AI guessDuctless systems avoid duct losses, which are large when ducts run through unconditioned space, but vendor savings figures are not independently measured.
Leans partly right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 1049-1054For cooling, homes cooled only by mini-splits used about 194 kWh per season against an estimated 830-1,000 kWh for central AC (a TRM estimate, not a metered comparison); for heating they were not cheaper than a gas forced-air system.

Zoned ductless heat pumps save energy by heating only the rooms in use

Leans partly right

Heating fewer rooms uses less energy, but the saving depends on occupants actually setting back unused zones.

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How a Ductless Heat Pump Can Save You Money and Energy | Mitsubishi Electric HVAC US (mitsubishicomfort.com)“You can save a lot of money and energy by sending less heat into lesser-used areas of your home.”
Leans partly right AI guessHeating fewer rooms uses less energy, but the saving depends on occupants actually setting back unused zones.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3490-3494Owners often heated or cooled only occupied rooms with the mini-split while the central system stayed low, which the evaluators say produces zonal savings not counted in their baselines; the effect was observed but not quantified.

Replacing an old oil furnace with a new oil furnace is a better choice than a heat pump

Leans wrong

In RMI's Providence model, heat pumps have a lower net present cost than heating-oil systems, as well as lower emissions.

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Old Furnace: Repair or Replace? (The Money Pit)“We suggest replacing the old oil fired furnace with new oil fired furnace, which will be much more efficient. Skip the heat pump.”
Leans wrong RMI 2018, the economics of electrifying buildings lines 817-818In RMI's Providence model, heat pumps have a lower net present cost than heating-oil systems, as well as lower emissions.
Leans wrong AI guessOil is among the costliest heating fuels and heat pumps cut bills for nearly all oil-heated homes in national simulations.

Heat pumps are inefficient where winter temperatures regularly fall near or below freezing

Leans wrong

In Minnesota, where winter is mostly below freezing, cold-climate heat pumps kept system efficiencies high and cut heating costs 30-56% against propane and resistance baselines.

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Out of Gas: New York’s Blocked Pipelines Will Hurt Northeast Consumers (Manhattan Institute)“But heat pumps are not efficient in regions where temperatures fall near or below freezing on a regular basis.”
Probably wrong AI guessModern heat pumps keep seasonal COPs around 2 or higher in cold climates; the claim reflects older units.
Leans wrong CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 495-518In Minnesota, where winter is mostly below freezing, cold-climate heat pumps kept system efficiencies high and cut heating costs 30-56% against propane and resistance baselines.
Leans wrong RMI 2018, the economics of electrifying buildings lines 966-970RMI's cold-climate unit still has a COP of 2.1 at 17F, twice as efficient as resistance heat, even though efficiency drops from 3.5 at 47F.
Leans wrong Wilson 2024 (NREL and LBNL), heat pumps for all? lines 157-163Cold-climate units listed by NEEP keep COP of 2 or more at 5F, well below freezing, and the modelled cold-climate unit keeps 85% capacity at 5F.
Leans wrong PNNL 2025, DOE Cold Climate Heat Pump Challenge field results lines 1000-1021Median field COPs were 1.6-2.7 across all bins below 30 F, about double resistance heat, although total system COP with auxiliary heat was lower in the coldest bins.
Leans wrong Edwards 2024, inequities in heat pump bill savings lines 1645-1659Edwards' NEEP-based fit (COP = 0.05T + 1.6) gives a COP of about 3.2 at 32F; only single-stage units below 5F are assumed to fall to resistance-level efficiency.
Leans wrong Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 3379-3381Measured COPs stayed above 1.0 at nearly all temperatures in a climate where half of winter hours were below 30-38 F, so units were efficient in energy terms; they were still uneconomic against gas at those prices.
Leans wrong Canadian Climate Institute 2023, heat pumps pay off lines 528-534Modern standard heat pumps perform well down to -8 to -10°C, well below freezing, and cold-climate units to -25°C (secondary citations).
Leans partly right Deetjen 2021, private economics of US residential heat pumps lines 758-761For minimum-efficiency units, cold-climate cities see peak demand more than double at full adoption because the heat pump must regularly run at very low temperatures, which lowers performance.

Switching to a heat pump saves more when it replaces an old, inefficient furnace

Leans right

Modeled cost savings were 40% replacing an 82% propane furnace versus 30% replacing a condensing propane furnace (metro), and 36% versus 26% in northern Minnesota.

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Which home energy upgrades will save you money? We did the math. (Washington Post)“you are most likely to save money if you’re switching from an older, less efficient gas furnace”
Very likely right AI guessA 70-80% AFUE furnace burns more gas per unit of heat than a new one, so the comparison favors the heat pump more.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 906-911In cold climates heat pumps save the median household $100-$200/yr less when replacing a 95% AFUE furnace rather than an 80% one.
Leans right CEE 2017, cold-climate heat pumps in Minnesota lines 298-314Modeled cost savings were 40% replacing an 82% propane furnace versus 30% replacing a condensing propane furnace (metro), and 36% versus 26% in northern Minnesota.

A heat pump's emissions fall over time as the electricity grid decarbonizes

Leans right

RMI expects the carbon benefit of heat pumps in California to grow as the grid moves toward 50% renewables by 2030, and expects Chicago's result to swing in favour as coal retires.

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Which home energy upgrades will save you money? We did the math. (Washington Post)““Unlike oil or gas systems, a heat pump becomes greener over time as the grid decarbonizes,””
Very likely right AI guessA heat pump's emissions track the grid's carbon intensity, which has been falling in most US regions.
Leans right RMI 2018, the economics of electrifying buildings lines 703-710RMI expects the carbon benefit of heat pumps in California to grow as the grid moves toward 50% renewables by 2030, and expects Chicago's result to swing in favour as coal retires.
Leans right Bernard 2024 (NBER), UK heat pumps and a time-of-use tariff lines 193-198Using UK government grid forecasts, annual savings rise from 1.16 to 1.86 t CO2eq by 2043 as electricity decarbonises (68% lifetime cut); the rise is a projection that holds consumption fixed, not a measurement.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 929-931As the grid becomes cleaner, electrification yields greater CO2 reductions; the model assumes grid emissions fall over the heat pump's life.
Leans right Edwards 2024, inequities in heat pump bill savings lines 62-66Edwards states that high heat pump use is likely to cut greenhouse gas emissions across much of the US, especially as the grid continues to decarbonize.
Leans right Less 2021 (LBNL), cost of decarbonization retrofits lines 2295-2301LBNL notes that electrification at comparable project cost locks in long-term carbon benefits as the grid becomes cleaner; this is stated reasoning, not a measured trend.

Adding heat pump load in winter can lower electricity rates by using spare grid capacity

Leans partly right

In summer-peaking systems added winter sales spread fixed costs, but in winter-peaking regions heat pumps can drive new grid investment.

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How Heat Pumps Reduce Energy Bills and Air Pollution in the San Francisco Bay Area (RMI)“heating homes with heat pumps can put downward pressure on electricity rates”
Leans partly right AI guessIn summer-peaking systems added winter sales spread fixed costs, but in winter-peaking regions heat pumps can drive new grid investment.
Leans right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 770-773Electrification raises electricity sales, which helps pay for infrastructure and potentially puts downward pressure on retail rates.
Leans right Deetjen 2021, private economics of US residential heat pumps lines 553-566Where networks have spare capacity, added demand may be beneficial by raising utilization of existing transmission and distribution.

Installers often set the dual-fuel switchover temperature higher than needed, reducing heat pump savings

Leans partly right

Practitioners and modelers report conservative default balance points, but systematic data on installed settings are limited.

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Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor (GreenBuildingAdvisor)“installers usually don’t know your heat loss and are overly conservative with the crossover point”
Leans partly right AI guessPractitioners and modelers report conservative default balance points, but systematic data on installed settings are limited.
Leans partly right CEE 2017, cold-climate heat pumps in Minnesota lines 716-727Minnesota installers commonly set the lockout around 25-35F (practice developed for non-cold-climate units), and the report says a higher setpoint would lock out the heat pump while it can still meet the load.
Leans partly right CEE 2018, ducted and ductless cold-climate heat pumps in the field lines 466-473Authors note that improved controls and lowering the switchover temperature would raise heat pump use and savings, since monitored units had spare capacity at the 10F changeover; installer practice itself is not surveyed here.
Leans partly right Guidehouse 2025, review of the MA and CT heat pump study lines 306-308The MA/CT metering study found impacts below assumed values partly due to other heat use, integrated controls and varying switchover temperatures, and recommends a 30F or lower switchover; how often it is set too high is not quantified.

Federal tax credits were not a major driver of heat pump adoption

Leans partly right

Shipments held up after 25C ended and adoption tracks climate and prices, but the counterfactual is not measured.

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Heat pumps have so far withstood the death of federal tax credits (Canary Media)“It could be that the tax credit was never a determining factor for most people getting heat pumps”
Leans partly right AI guessShipments held up after 25C ended and adoption tracks climate and prices, but the counterfactual is not measured.

Even a full refrigerant leak from a heat pump has less warming impact than a year of burning oil or gas for heat

Leans partly right

A 2-5 lb R-410A charge is about 2-5 tCO2e, comparable to a gas furnace's annual emissions and below a typical oil boiler's.

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Homeowner Heat Pump FAQs - Efficiency Maine (efficiencymaine.com)“it would have less global warming potential than running an oil or gas boiler or furnace for a year”
Leans partly right AI guessA 2-5 lb R-410A charge is about 2-5 tCO2e, comparable to a gas furnace's annual emissions and below a typical oil boiler's.

Ductless heat pumps cool more cheaply than window air conditioners

Leans right

Inverter mini-splits have seasonal efficiency ratings roughly twice those of typical window units.

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Homeowner Heat Pump FAQs - Efficiency Maine (efficiencymaine.com)“Heat pumps cool for half the cost of window air conditioners.”
Very likely right AI guessInverter mini-splits have seasonal efficiency ratings roughly twice those of typical window units.
Leans right Cadmus 2016, ductless mini-split evaluation (MA and RI) lines 617-621Against an EER 9.8 window AC baseline, the average mini-split saved about 54 kWh per summer (213 vs 159 kWh), a modest but real saving.
Leans right Guidehouse 2025, review of the MA and CT heat pump study lines 245-262Cooling-only mini-splits replacing room ACs save about 156 kWh per ton a year in MA, a modest saving that does not make the upgrade cost-effective (benefit-cost 0.16).
Leans right Canadian Climate Institute 2023, heat pumps pay off lines 374-376Heat pumps cool more efficiently than window and portable air conditioners (secondary citation); the passage does not single out ductless units.

Federal IRA rebates can cover most or all of a heat pump's cost for low-income households

Leans partly right

HEAR allows up to 100% of cost capped at $8,000 for low-income households, but availability depends on each state's program.

· denied 0 ·

Asserts (1)Denies (0)Verdicts (3)

3 ways heat pumps save you money (homes.rewiringamerica.org)“The rebate’s upfront discounts will cover up to 100 percent of point-of-sale purchases for low-income households”
Leans partly right AI guessHEAR allows up to 100% of cost capped at $8,000 for low-income households, but availability depends on each state's program.
Leans right National Housing Trust 2026, state rebate tracker lines 33-61Under the federal HEAR design, rebates could cover 100% of project costs up to $14,000 per unit, with up to $8,000 for a space-heating heat pump, for low- to moderate-income households; availability depends on each state's launch, and since mid-2026 fuel-switching no longer qualifies.
Leans partly right Wilson 2024 (NREL and LBNL), heat pumps for all? lines 615-620IRA electrification rebates offer up to $8,000 per low-income household (plus wiring and duct allowances), against mean heat pump upfront costs of $9,000-$24,000 in cold climates; most of the cost only for cheaper installs.

Score	Source	Novelty	Verdict
+2	HVAC sizing follow-up (aux heat, shared walls, sizing for heating, "runs all the time," etc) Technology Connextras Show claimsNovel (4)Right (12)Wrong (0)Partly (0)Untestable (0)All (12) Two-stage or variable-capacity heat pumps can be sized for heating without short cycling in cooling season Leans right “variable capacity means someone can oversize for heating and it won't be a problem in the summer” only this source Inverter-driven heat pumps run long low-output cycles, which is easier on the compressor than short cycling Leans right “modern inverter driven equipment of the fancier variety strives to never stop it will just slow down the compressor to match loading” only this source A smaller furnace running longer uses about the same fuel as a larger one cycling on and off Leans right “a furnace which runs for twice as long because it's half the capacity is using the exact same amount of energy” only this source Most gas furnaces also stop heating during a power outage Leans right “my gas furnace doesn't work when the power is out” only this source A heat pump can be added alongside an existing furnace to cut fuel use Leans right “most of the time you will try to use the heat pump as your only source of heating” 1 of 6 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “that's a big Power draw and you need to run a new circuit to it in almost all cases” 1 of 7 sources Removing the gas connection saves its fixed monthly charge Probably right “even if you use none you're typically being charged 25 to 30 bucks a month just to have that gas line” 1 of 9 sources DENIES Heat pumps do not work in very cold climates Probably right “stop saying that heat pumps don't work in cold weather that is outdated information” 1 of 17 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “they emit less than burning gas locally in most cases and on a year on a year-over-year level certainly they do” 1 of 19 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “air conditioners are heat pumps it bothers me so much that I have a heat pump but it only pumps out” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “it got down to -12 Fahrenheit orus 245 celsi before my mom and dad's 3 ton cold climate heat pump required backup heat” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “a heat pump is a way for us to use less electricity and get more heat” 1 of 35 sources	2.37	new and sound
+2	Colorado Heat Pump Rebates Just Changed (Summer 2026 Update) Just Heat Pumps Show claimsNovel (4)Right (5)Wrong (0)Partly (3)Untestable (0)All (8) State-run HEAR heat pump rebate funds can be exhausted soon after launch Leans right “as of April 28th, the zone one funds are fully allocated. This went so fast” only this source Heat pump rebate programs involve heavy paperwork and long payment delays Leans right “On our end, it's hours hours of work and paperwork and calculations and everything, photos, geotag photos” only this source Heat pump rebates from utility, state and local programs can be stacked Leans right “They do stack on each other like you said” only this source Colorado offers a state tax credit for heat pumps installed in 2026 Leans right “this is still in play for the full year 2026. It it got lowered 50% from from 2025. So now it's $1000 per home” only this source Zero-percent HVAC dealer financing builds its cost into the equipment price Leans partly right “the zero down things, the 0% Someone's paying for that and it's usually rolled into the homeowners cost” only this source State and utility rebates can cover a large share of a heat pump's cost Leans partly right “the rebates are still $2,250 per ton at 5° performance for the heat pump.” 1 of 9 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “if you do air sealing and insulation first, it's another $600 bonus if you do it before our heat pump HVAC system goes in” 1 of 18 sources A heat pump costs more to buy and install than a gas furnace Leans right “They can be one of the more expensive replacements for furnaces and boilers and stuff that you'll have in your lifetime” 1 of 22 sources	2.32	new and sound
+2	Which home energy upgrades will save you money? We did the math. Washington Post Show claimsNovel (3)Right (10)Wrong (0)Partly (1)Untestable (0)All (11) Switching to a heat pump saves more when it replaces an old, inefficient furnace Leans right “you are most likely to save money if you’re switching from an older, less efficient gas furnace” only this source A heat pump's emissions fall over time as the electricity grid decarbonizes Leans right ““Unlike oil or gas systems, a heat pump becomes greener over time as the grid decarbonizes,”” only this source DENIES A heat pump pays for itself through lower energy bills within a few years Leans right “making the payback period around 48 years” 1 of 3 sources Heat pump water heaters use far less energy than conventional water heaters Leans right “Switching to a heat pump version, energy auditors found, would save $240 per year and cost just $978 after local utility rebates.” 1 of 4 sources Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “But installing it would cost around $12,000 after rebates, making the payback period around 48 years.” 1 of 6 sources Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “the difference between the cost of a new heat pump and a new furnace — bringing the payback time closer to eight years” 1 of 6 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “if this home was subject to Chicago’s weather and prices of utilities, switching to a minimum efficiency heat pump could actually lose money” 1 of 7 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “homeowners could save money switching from fuel oil, which is relatively expensive, but not from gas” 1 of 16 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “In Maryland, electricity is about three times the cost of gas, sapping most of the benefits of switching to a heat pump.” 1 of 21 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right ““It’s a relationship between the outdoor temperature, your rates and the efficiency of the heat pump,”” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “just 1 kWh of electricity can pull 3 or 4 kWh of heat indoors” 1 of 35 sources	1.65	new and sound
+2	Are Heat Pumps a Scam? Undecided with Matt Ferrell Show claimsNovel (3)Right (12)Wrong (0)Partly (2)Untestable (0)All (14) Even in cold weather a heat pump delivers more heat per unit of energy than a fossil-fuel furnace Leans right “So even when heat pumps have to work harder in colder climates, you’re still getting better performance than you would with fossil fuels.” only this source The installed cost of a heat pump varies widely with the home, location and system type Probably right “The most important thing to know about the cost of any heat pump is that it’s extremely variable.” 1 of 2 sources Geothermal ground loops last for decades, far longer than the heat pump unit Leans right “that portion of the system can last decades. We’re talking as long as 50 years or more.” 1 of 2 sources DENIES Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “out of 365 days a year, there’s four to seven days of temperatures that force the backup heating system to kick on” 1 of 2 sources Heat pump reliability problems mostly come from poor installation Leans partly right “a heat pump is only as reliable as its installer” 1 of 2 sources Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “with some GHPs paying for themselves in as few as three years, and others hitting that point after a decade” 1 of 6 sources Ducted heat pumps can often use a home's existing ductwork Leans right “In most places across the States, you can swap your central AC or furnace with an ASHP, no ducts required.” 1 of 7 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “our president’s “Big Beautiful Bill” put an end to several federal tax credits in 2025.” 1 of 10 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “Air-source heat pumps tend to be much cheaper than geothermal ones.” 1 of 11 sources DENIES Heat pumps do not work in very cold climates Probably right “Low temperatures used to be a problem, but newer iterations of ASHPs implement multiple strategies to keep themselves running during extreme weather.” 1 of 17 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “even highly efficient heat pumps can cost more to operate than a gas furnace.” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Eversource has a winter rate program that cuts distribution and transmission costs by about 23% from November through April.” 1 of 24 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “modern heat pumps work in temperatures down to -26°C” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “heat pumps can be more than 100% efficient. They can deliver more thermal energy than the electrical energy they consume.” 1 of 35 sources	1.62	new and sound
+2	Furnace vs. Heat Pump... or both?! Know BEFORE you buy🔥🤯 The Thought Provocateur Show claimsNovel (3)Right (9)Wrong (0)Partly (2)Untestable (0)All (11) A high-efficiency system pays back only if you stay in the home long enough to recoup its extra cost Leans right “you will have a long enough Break Even period to recoup these costs” only this source Replacing equipment like-for-like is the cheapest installation option Leans right “the cheapest option will always be swapping your existing unit with a like for light replacement” only this source Modern heat pumps run quietly Leans right “inverter heat pumps have and modulating furnaces take the cake in this category because they are very quiet” 1 of 2 sources Heat pumps are a better fit than gas furnaces in mild climates Leans right “if you're in a moderate climate a heat pump will be able to keep up year-round without breaking the bank” 1 of 4 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “you need to upgrade your entire electrical panel” 1 of 7 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “it has been rare to see scenarios where heat pumps are cheaper to run than furnaces” 1 of 10 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “these are an excellent choice in climates like Colorado” 1 of 12 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “a very cold climate and very cheap natural gas prices it is almost always more efficient to run a high efficiency furnace” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “if you have a surplus of solar energy you can run oftentimes run your heat pump for free” 1 of 23 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “you have to look at the cost of natural gas in your area versus the cost of electricity” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “most high efficiency heat pumps are efficient down to as low as 0 to 10 degrees Fahrenheit” 1 of 34 sources	1.62	new and sound
+2	I Tried Getting a Heat Pump… Here’s What Actually Happened Gary Does Solar ☀️ Show claimsNovel (3)Right (9)Wrong (1)Partly (1)Untestable (0)All (11) Heat loss calculations for the same home can differ widely between surveyors Leans right “the heat loss this time was something around 7 and 1/2 kW, so quite different to the Octopus one.” only this source A heat pump hot water cylinder gives a more limited hot water supply than a combi boiler Leans right “we have noticed that it can run out of hot water, and so you have to wait an hour or something like that.” only this source A heat pump shifts heating cost onto the electricity bill, which can rise sharply in winter Probably right “some of that cost simply shifts across to your electricity bill, which can be a little shocking when you see it first happening.” 1 of 3 sources A heat pump needs a heat loss calculation and system design to work well Leans right “for a air to water heat pump to work well, the design has to be done correctly.” 1 of 4 sources The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “in the UK there's currently a grant which is 7 and 1/2 thousand pounds if you go for an air to water solution.” 1 of 6 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “They tend to be more efficient than air source systems, especially in winter, but they are more expensive to install” 1 of 11 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “even with a standard electricity tariff uh a heat pump will be cheaper than a gas boiler.” 1 of 16 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “they're having such a dramatic impact on reducing carbon footprint.” 1 of 19 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “when you combine them with solar panels and a home battery, the benefits really start to stack up.” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “three cheaper periods spread throughout the day, allowing your heat pump to operate at less cost.” 1 of 24 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “it doesn't use the energy you put in to generate heat. Instead, it simply moves heat from one place to another.” 1 of 35 sources	1.58	new and sound
+2	Heat Pumps' 70% Savings Claim Is Real — Just Not For Your Bill Future Power Show claimsNovel (2)Right (7)Wrong (0)Partly (1)Untestable (0)All (8) DENIES Switching to a heat pump cuts heating bills by half or more Leans right “the actual saving on your bill, once you switch from gas, lands closer to 20 to 30%, not 70%” only this source Real-world heat pump efficiency is lower than manufacturers' rated figures Probably right “Manufacturer claims of 4.0 to 5.0 are lab numbers, not a British winter.” only this source Heat pumps on radiator systems often need larger radiators to run efficiently Leans right “a heat pump dropped into a house with the old gas boilers small radiators often disappoints” 1 of 4 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “it's a mismatched installation being asked to do a harder job than it's suited for” 1 of 15 sources Electric resistance heat costs far more to run than a heat pump Probably right “genuinely uses about a third of the electricity to produce the same heat as a resistance heater” 1 of 18 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “Better insulation comes first because it helps regardless of what you end up choosing” 1 of 18 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “gas per unit of energy is significantly cheaper than electricity in the UK” 1 of 21 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “Because you're moving heat rather than creating it, one unit of electricity in can deliver three or more units of heat out” 1 of 35 sources	1.46	new and sound
+2	“Dual Fuel Heat Pumps are JUNK” 😬🔥 The Thought Provocateur Show claimsNovel (3)Right (6)Wrong (0)Partly (0)Untestable (0)All (6) In cold climates a heat pump sized for the cooling load cannot carry the full heating load Leans right “heat pumps will not be able to carry the entire load of a house in cold climates” only this source A dual-fuel system lets a smaller heat pump handle most heating while a furnace covers the coldest days Leans right “that 2ton heat pump will keep up with the heating load the majority of the time in Denver” only this source Heat pump installation quotes vary widely between contractors for similar equipment Leans right “recommended systems range from 35k up to 60k” 1 of 3 sources Existing ductwork can be too small for the airflow a heat pump needs Leans right “I can almost guarantee the duct work is not big enough to handle this amount of air flow” 1 of 4 sources An air conditioner is a heat pump that only runs in one direction Leans right “an air source heat pump is just an air conditioner with a reversing valve” 1 of 8 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “the system is going to be way oversized for the house and short cycle in cooling season” 1 of 15 sources	1.45	new and sound
+2	What's the Right Backup Heat Strategy for Cold Climate Heat Pumps? HVAC Pro Blog Show claimsNovel (2)Right (6)Wrong (0)Partly (5)Untestable (0)All (11) Running a heat pump on emergency heat instead of the heat pump sharply raises electric bills Leans right “Running emergency heat all winter because a home owner thinks it's warmer is one of the most expensive mistakes I've seen” only this source Setting an auxiliary heat lockout temperature keeps backup strip heat from running in mild weather Leans right “This protects against the strip heat kicking on unnecessarily during mild weather, which is a huge driver of high electric bills.” 1 of 2 sources Backup heat should be sized to cover the gap at design temperature, not the full heating load Leans partly right “You size supplemental heat to cover the supplemental load, not the full design load” only this source A cold-climate heat pump needs backup heat only on a few of the coldest days of the year Leans partly right “I tell homeowners the heat pump's going to handle 95 to 98% of your heating hours over the course of the year.” 1 of 2 sources A heat pump still uses less energy than resistance heat even in very cold weather Probably right “a cold climate heat pump at 0° will still be delivering a coefficient of performance of two or higher” 1 of 4 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “their customers are getting hit with electric bills that they never saw coming.” 1 of 10 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “This can be a very cost-effective strategy, especially in areas with high electricity rates and cheaper natural gas.” 1 of 12 sources Electric resistance heat costs far more to run than a heat pump Probably right “It's simple and reliable, but expensive to operate.” 1 of 18 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “A leaky house with a cold climate heat pump and electric heat backup heat is going to be an expensive house to heat.” 1 of 18 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “equipment that can deliver full rated capacity down to 5° Fahrenheit and still produce heat at -13.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “It moves heat. It doesn't make heat the way a gas furnace does.” 1 of 35 sources	1.41	new and sound
+2	Heat Pump Rebates: What Survived, and Who No Longer Qualifies Owen Marsh Show claimsNovel (2)Right (5)Wrong (0)Partly (1)Untestable (1)All (7) Since mid-2026 the federal electric appliance rebate no longer pays to replace gas or oil heating with a heat pump Very likely right “Rebates are now allowed only for upgrading from existing electric equipment” only this source DENIES Federal Inflation Reduction Act rebates for heat pumps are available to most homeowners Probably right “Between 80 and 150%, it covers half. Above that, nothing at all.” 1 of 2 sources The federal whole-home efficiency rebate still pays toward a heat pump that replaces gas heating Unknown “There is no fuel test in the whole house program because it was never built around fuel.” only this source Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “12 states and the District of Columbia had launched as of June. 43 states and territories still have none.” 1 of 6 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “Set that against what died in December. $2,000 a year for a heat pump” 1 of 10 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “utilize rebates for insulation and air sealing prior to installing heating and cooling upgrades” 1 of 18 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “The $2,000 credit for a heat pump ran out at the end of December.” 1 of 22 sources	1.40	new and sound
+2	INFLATION Reduction Act Means MONEY for HVAC! HVAC Guide for Homeowners Show claimsNovel (2)Right (3)Wrong (0)Partly (0)Untestable (0)All (3) Claiming a heat pump incentive requires proof that the installed equipment pairing meets the efficiency standard Leans right “make sure your contractor gets you the Ahri certificate” only this source From 2023 through 2025 a federal tax credit covered part of the cost of a home energy audit Very likely right “homeowners can also get a credit up to 150 dollars for a qualified home energy audit” only this source From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “can take it credit up to two thousand dollars” 1 of 22 sources	1.39	new and sound
+2	Heat Pumps in 2026 \| What you should know The Thought Provocateur Show claimsNovel (1)Right (7)Wrong (0)Partly (4)Untestable (0)All (11) The R-410A refrigerant phase-down does not require replacing a working system Leans right “if you have a 410A system, not to worry. You don't have to rush out and replace it right away.” only this source Proper sizing from a load calculation matters more than brand Leans partly right “The bottom line is that brand, in my opinion, is not as important” only this source A heat pump with an electric air handler costs less to install than a dual-fuel system with a furnace Leans partly right “typically this is going to be more cost-effective because you don't have to have an added furnace and evaporator coil” only this source Inverter-driven heat pumps run more efficiently and quietly than single-stage units Leans right “Inverter-driven systems are number one most efficient. Number two, they're most quiet.” 1 of 4 sources Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “a geothermal heat pump qualifies for up to a 30% tax credit of the total purchase price.” 1 of 7 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “the state of Colorado has a $1,500 tax credit also available for anyone that installs a heat pump.” 1 of 9 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “often times you will find yourself opting for a dual fuel system just for both comfort and efficiency sake because they are more efficient.” 1 of 12 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “that can be the difference between a system working well, troublefree for years, or you having repeated issues and repeated service calls” 1 of 15 sources DENIES Heat pumps do not work in very cold climates Probably right “But the bottom line is this is just a myth.” 1 of 17 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “right now on all Airsource heat pumps, which are traditional style heat pumps, there is a $2,000 tax credit that is federal.” 1 of 22 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “There are lots of heat pumps that maintain 100% capacity all the way below 0° Fahrenheit before they start to lose capacity” 1 of 31 sources	1.37	new and sound
+2	The Shocking Truth About Heat Pumps - Energy Vanguard Energy Vanguard Show claimsNovel (2)Right (5)Wrong (0)Partly (1)Untestable (0)All (6) Heat pumps are easier than furnaces to size to the small heating loads of efficient homes Leans right “it’s easier and less expensive to get a heat pump small enough to match the loads of a high performance home” only this source Comparing heat pump and gas running costs requires converting both to cost per delivered unit of heat Leans right “find out how many cents per Btu you pay for each fuel, with the equipment efficiency factored in.” only this source Heat pumps are a better fit than gas furnaces in mild climates Leans right “Where cooling loads dominate, heat pumps do, too.” 1 of 4 sources Removing the gas connection saves its fixed monthly charge Probably right “get gas bills in the summer showing no gas consumption and an amount due of $30 or so.” 1 of 9 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “one of their biggest drawbacks: electric resistance heat to supplement the heat pump at low temperatures. Yes, most heat pumps need supplemental heat.” 1 of 10 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “with rates, efficiencies, and equipment costs all over the map, you can’t make any generalization about always using heat pumps or always using gas heat.” 1 of 31 sources	1.25	new and sound
+2	How Much Does a Heat Pump Cost? Between $8K and $23K - Here's Why Yarbrough & Sons Heating, Cooling & Plumbing Show claimsNovel (2)Right (6)Wrong (0)Partly (1)Untestable (0)All (7) Heat pump prices vary mainly with system size and efficiency tier Leans right “between $8,000 and $23,000 just depending on the size of your home and the efficiency level that you opt for” only this source Major heat pump brands carry 10-year parts and compressor warranties Leans right “we're going to have a 10-year parts, 10-year compressor, and a uh 10-year indoor warranty” only this source A heat pump cools as efficiently as a comparable central air conditioner Leans right “a heat pump at its base level is going to be more efficient than the base model air conditioner” 1 of 6 sources Ducted heat pumps can often use a home's existing ductwork Leans right “You've already got the inner workings, the uh lifeblood, the duct work, the line sets” 1 of 7 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “So it brings that price up just a little bit.” 1 of 9 sources Electric resistance heat costs far more to run than a heat pump Probably right “it is expensive to run those heat strips” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “it's a dualpurpose system” 1 of 25 sources	1.24	new and sound
+2	How My Geothermal Heat Pump Really Performed (2 Years) Undecided with Matt Ferrell Show claimsNovel (2)Right (7)Wrong (0)Partly (2)Untestable (0)All (9) Geothermal heat pumps run best with little or no thermostat setback Leans right “Geothermal HVAC systems are best run with little to no temperature setback” only this source A geothermal desuperheater preheats domestic hot water using waste heat Leans right “This captures waste heat from the system and uses it to preheat water” only this source Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “After the federal rebates, the system cost came down to about $54,000.” 1 of 7 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “However, federal, state, and utility rebates can dramatically reduce those costs” 1 of 9 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “Turns out that the cost of maintaining my geothermal system is basically the same as the natural gas HVAC system” 1 of 9 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “the projected yearly operating costs were less than half what a comparable air source system would run in my area.” 1 of 11 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “operating cost of my HVAC and hot water setup is, well, it's basically zero.” 1 of 23 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “But an air source heat pump at those same frigid, 20 below, air temperatures would lose” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “You're essentially using one watt of electricity to move three to five watts of heat.” 1 of 35 sources	1.22	new and sound
+2	Warming your house the green way just got more expensive \| The Indicator NPR's Planet Money Show claimsNovel (2)Right (5)Wrong (0)Partly (1)Untestable (0)All (6) Most federal home energy tax credit claims went to higher-income households Leans right “A lot of those folks were also higher earners.” only this source Heat pumps outsell gas furnaces in the US Leans right “heat pumps out sold gas furnaces for uh the fourth consecutive year” only this source State and utility rebates can cover a large share of a heat pump's cost Leans partly right “the EPA funded a program that pays up to $8,500 to residents who want to make the switch to heat pumps” 1 of 9 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “which sunseted the credits much earlier on December 31st, 2025” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “In Juno, having one can save residents hundreds of dollars a year in heating costs.” 1 of 15 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “they can write off 30% of that cost, up to $2,000” 1 of 22 sources	1.19	new and sound
+2	Heat pumps and COLD WEATHER 🥶🔥 The Thought Provocateur Show claimsNovel (1)Right (6)Wrong (0)Partly (2)Untestable (0)All (8) SEER and HSPF ratings do not fully capture a heat pump's real-world efficiency Probably right “some systems may have lower hspf or Seer ratings but actually be more efficient” only this source Basic single-stage heat pumps are rated for heating only down to around freezing Leans partly right “most single stage 14 Seer or 16 Seer heat pumps are only graded down to 25 or 30 degrees Fahrenheit” only this source Inverter-driven heat pumps run more efficiently and quietly than single-stage units Leans right “in general the best types of heat pumps are always going to be inverters” 1 of 4 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “when this happens you won't get heat coming through your vents during the defrost cycle” 1 of 8 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “you can actually run whatever is most efficient or cheapest to run in a given year in terms of how you stage your equipment” 1 of 12 sources DENIES Heat pumps do not work in very cold climates Probably right “the bottom line is that modern heat pumps work well in most cold climates” 1 of 17 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “they are rated to perform down to negative 10 Fahrenheit” 1 of 31 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “this also changes from year to year with natural gas prices” 1 of 31 sources	1.14	new and sound
+2	Heat Pump SHUT OFF Temp with AUX HEAT! HVAC Guide for Homeowners Show claimsNovel (2)Right (4)Wrong (0)Partly (1)Untestable (0)All (5) The best heat pump lockout or balance-point temperature differs for every home Leans right “there is no cookie cutter answer when we're talking about balance point” only this source With electric backup, the heat pump keeps running alongside the heat strips to cut backup use Leans right “the majority of those types of systems with electric backup do not shut off based on what the outdoor temperature is” 1 of 2 sources Heat pumps that need no backup heat at all are coming to market Leans partly right “you're going to see more and more systems on the market that don't have any backup heat at all” only this source DENIES Heat pumps do not work in very cold climates Probably right “We're seeing markets and climates that these systems are being installed in and saving folks energy” 1 of 17 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “if it gets so cold outside that the heat pump is basically rendered useless” 1 of 34 sources	1.05	new and sound
+2	Are Heat Pumps Worth It in Oklahoma? Everything You Need to Know Yarbrough & Sons Heating, Cooling & Plumbing Show claimsNovel (2)Right (7)Wrong (1)Partly (0)Untestable (0)All (8) Heat pumps need a correct refrigerant charge and a matched indoor coil to run efficiently Leans right “in a heat pump it is very crucial that we have the correct charge on there” only this source The installed cost of a heat pump varies widely with the home, location and system type Probably right “how much would it cost to put in a heat pump and that answer is going to be it depends” 1 of 2 sources A heat pump needs a heat loss calculation and system design to work well Leans right “you need to calculate what your heat load is going to be on that house” 1 of 4 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “especially if you have propane you can definitely save quite a bit” 1 of 15 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “unless you're in that kind of situation where you're getting free gas I would say we can definitely save you money” 1 of 16 sources Electric resistance heat costs far more to run than a heat pump Probably right “anybody that has Total Electric is going to drastically improve by having a actual heat pump as opposed to using electric heat strips” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “the short answer to that can a heat pump replace a furnace yes” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “they have actually taken heat pumps in Alaska and they don't have backup heat” 1 of 31 sources	1.04	new and sound
+2	How to calculate when heat pumps make financial sense (and other heat pump follow-up thoughts) Technology Connextras Show claimsNovel (1)Right (6)Wrong (0)Partly (3)Untestable (0)All (9) Landlords who don't pay utility bills have little reason to install efficient heating Leans right “they will always take the cheap option because that's in their best interest” only this source A heat pump beats gas on running cost only when its COP exceeds the electricity-to-gas price ratio Probably partly right “to get a heat pump to match the cost of gas it needs to have a cop of four” only this source Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “there should not be a significant price delta between a standard air conditioner” 1 of 9 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “a geothermal heat pump is not feasible for the vast majority of people” 1 of 11 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “why would you not also want it to be a heat pump some days of the year it's going to cost you less” 1 of 12 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “as of now i only need to get a cop of two to be paying less than propane for heating” 1 of 15 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “your electricity is 15 cents per kilowatt hour well then you're never gonna get a heat pump to beat the cost of gas” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “on that variable rate plan here in the winter the electric cost is generally always lower” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “you need to equate your cost per kilowatt hour of your heating fuel and then compare that to your cost of electricity” 1 of 31 sources	1.02	new and sound
+2	Top 3 Heat Pump ISSUES in Winter! HVAC Guide for Homeowners Show claimsNovel (3)Right (3)Wrong (0)Partly (1)Untestable (0)All (4) Skipping heat pump maintenance raises its running costs Leans right “poor airflow can cause your utility bills to spike” only this source A faulty heat pump can run unnoticed on backup resistance heat and send bills soaring Leans right “they're going months at a time low refrigerant heat pump is struggling but because there's a backup heat Source they don't even know it” 1 of 2 sources Snow and ice buildup on the outdoor unit can stop a heat pump from heating Leans right “systems will just not properly defrost like they should and it's not sensing that ice like it should” 1 of 3 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “a lot of folks were relying on their backup heat sources in some cases those days haven't ended” 1 of 10 sources	0.98	mixed
+2	Heat Pumps are Not Hard: Here's what it will take to start pumping Technology Connections Show claimsNovel (1)Right (7)Wrong (0)Partly (3)Untestable (0)All (10) Contractors routinely oversize heating and cooling equipment Leans right “Around here they all seem to be oversized by a factor of about 2.” 1 of 3 sources Many installers charge heat pump prices far above the equipment and labor cost Leans partly right “I cannot see the quote he got as anything but a dishonest company taking advantage of someone looking to install a “trendy” heat pump” only this source Installers can absorb heat pump rebates by raising their quotes Leans partly right “Whatever savings the rebate might bring can simply evaporate if the installer builds it into the quote” only this source Existing ductwork can be too small for the airflow a heat pump needs Leans right “airflow may become a challenge in existing homes thanks to ductwork restrictions.” 1 of 4 sources Ducted heat pumps can often use a home's existing ductwork Leans right “homes with central air conditioning are basically already set.” 1 of 7 sources An air conditioner is a heat pump that only runs in one direction Leans right “Because, once again, air conditioners ARE heat pumps!” 1 of 8 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “The wisest thing we can do in the short term can be expressed in these three simple words: insulate, insulate, and insulate.” 1 of 18 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “Locally we need a consistent COP of 4 just to break even with the cost of gas” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “the performance challenges heat pumps currently encounter at very cold temperatures” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “Heat pumps move heat rather than create it.” 1 of 35 sources	0.96	mixed
+2	Why Heat Pumps are Immensely Important Right Now Technology Connections Show claimsNovel (1)Right (9)Wrong (0)Partly (1)Untestable (0)All (10) Burning gas in a power plant to run a heat pump delivers more heat than burning it in a home furnace Leans right “it actually makes more sense to burn natural gas in a power plant to generate electricity than it does to pipe that gas into homes” only this source A cold-climate heat pump needs backup heat only on a few of the coldest days of the year Leans partly right “The thing to keep in mind about these backups, though, is that they are needed only in exceptional cases.” 1 of 2 sources A heat pump still uses less energy than resistance heat even in very cold weather Probably right “Still generally better than 1, though, so it still makes sense” 1 of 4 sources DENIES Heat pumps do not work in very cold climates Probably right “But we are definitely one of those places where the conventional wisdom says heat pumps don’t work.” 1 of 17 sources Electric resistance heat costs far more to run than a heat pump Probably right “they require a fraction of the energy of resistive heat” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “will reduce the total amount of fuel required to heat your home over a year — even with today’s electric grid.” 1 of 19 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “the cost of electricity in your area compared to that of natural gas makes cost comparisons a hyper-local exercise” 1 of 31 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “Many units now guarantee operation down to -13°F which is -25°C” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “but they won’t attain their full output and will have a poor COP at that temp” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “they have coefficients of performance that are greater than 1.” 1 of 35 sources	0.95	mixed
+2	Heat Pump vs. Air Conditioner: Full Comparison and Breakdown Yarbrough & Sons Heating, Cooling & Plumbing Show claimsNovel (1)Right (4)Wrong (0)Partly (0)Untestable (0)All (4) From 2023 through 2025 a federal tax credit covered up to $600 of a high-efficiency central air conditioner Very likely right “So, air conditioner has a maximum 25c tax credit of $600.” only this source A heat pump cools as efficiently as a comparable central air conditioner Leans right “So a heat pump has the exact same function except it can do it both ways.” 1 of 6 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “Now, on the heat pump side has a 25c tax credit maximum of $2,000.” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “A heat pump can heat your home and is a viable option as a primary heat source.” 1 of 25 sources	0.95	mixed
+2	Heat Pumps, Solar, EVs, & Insulation: 25C and 25D Tax Credit Deadlines Explained Elephant Energy Show claimsNovel (1)Right (7)Wrong (0)Partly (4)Untestable (0)All (11) A heat pump raises a home's resale value Leans right “electrified homes uh can actually command a higher premium on the market” 1 of 3 sources Replacing gas appliances with electric ones improves indoor air quality Leans partly right “burning uh stuff indoors has on, you know, things like childhood asthma” only this source Heat pumps give more even heating and cooling than furnaces and air conditioners Leans partly right “they just create much more even heating and cooling” 1 of 2 sources Incentives can make a heat pump cheaper upfront than a furnace and air conditioner Leans partly right “making this substantially lower cost than a new gas furnace and air conditioner” 1 of 3 sources Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “their roll out has been extremely slow” 1 of 6 sources Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “you can claim the 25D, uh, credit for 30% off the entire cost of a ground source heat pump installation” 1 of 7 sources Ducted heat pumps can often use a home's existing ductwork Leans right “you can um just swap that for a heat pump and that will use your existing ducts” 1 of 7 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “huge incentives from Massave up to $10,000 for heat pumps” 1 of 9 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “if you were coming from electric resistance, if you're coming from propane” 1 of 16 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “That includes a $2,000 cap for heat pumps and heat pump water heaters” 1 of 22 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “it's not creating heat, it's just moving heat around and that makes it super super efficient” 1 of 35 sources	0.94	mixed
+2	Heat Pump & AC costs have SKYROCKETED 🚀 What you can do The Thought Provocateur Show claimsNovel (2)Right (2)Wrong (0)Partly (1)Untestable (1)All (4) HVAC replacement prices rose sharply in recent years Leans right “haven't gotten a bid on what it costs to replace an HVAC system in a few years you might be in for a surprise” only this source Heat pump installation quotes vary widely between contractors for similar equipment Leans right “if you see one bid that is substantially cheaper than the other two I would be very wary of that bid” 1 of 3 sources Replacing HVAC equipment before it fails, in the off season, gets a lower price Leans partly right “by being proactive and replacing things in the off season oftentimes contractors will wheel and deal and give promotional shoulder season discounts” only this source Contractors discount replacing the furnace and air conditioner together Unknown “a lot of companies will provide bundle deals if you're replacing both the furnace and air conditioner at the same time” only this source	0.92	mixed
+2	Homeowner Heat Pump FAQs - Efficiency Maine efficiencymaine.com Show claimsNovel (1)Right (4)Wrong (0)Partly (1)Untestable (0)All (5) Ductless heat pumps cool more cheaply than window air conditioners Leans right “Heat pumps cool for half the cost of window air conditioners.” only this source Even a full refrigerant leak from a heat pump has less warming impact than a year of burning oil or gas for heat Leans partly right “it would have less global warming potential than running an oil or gas boiler or furnace for a year” only this source A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “heating with heat pumps is usually less expensive than heating with oil, kerosene, or propane” 1 of 15 sources DENIES Heat pumps do not work in very cold climates Probably right “Properly sized, selected, and located heat pumps can heat a home without backup.” 1 of 17 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “Many heat pumps provide efficient heating down to -22°F or lower, regardless of windchill.” 1 of 31 sources	0.84	mixed
+2	Why Heat Pumps are Essential for the Future - Explained Undecided with Matt Ferrell Show claimsNovel (1)Right (9)Wrong (0)Partly (1)Untestable (0)All (10) Ground-source heat pumps work efficiently in almost any climate because ground temperature is stable Leans right “can work efficiently basically everywhere since the ground has lower temperature variations” 1 of 2 sources A ground-source heat pump pays back its extra cost within about a decade Leans partly right “they have a payback period of 5-10 years” 1 of 2 sources Heat pumps on radiator systems often need larger radiators to run efficiently Leans right “you may need a larger size radiator to ensure that its surface area is large enough” 1 of 4 sources Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “the savings depend on the location and climate of the installation” 1 of 6 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “at very low temperatures, frost can accumulate over the outdoor coil, which can reduce efficiency” 1 of 8 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “their problem is the high upfront cost” 1 of 11 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “if you consider a natural gas boiler, the savings are lower since gas is so cheap” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “the major challenges for making heat pumps the mainstream choice are the upfront cost” 1 of 22 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “When the ambient temperature drops to -10ºC (about 14ºF) or lower, the heat pump's electric power consumption rate increases” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “it’s not creating heat energy it’s only moving it” 1 of 35 sources	0.82	mixed
+2	Heat Pumps: the Future of Home Heating Technology Connections Show claimsNovel (1)Right (8)Wrong (0)Partly (2)Untestable (0)All (10) Widespread backup resistance heat in extreme cold strains the electric grid Leans right “that can put an untenable strain on the electric grid.” only this source Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “On cold, humid days it has to defrost rather frequently, limiting its output, and reducing efficiency.” 1 of 8 sources An air conditioner is a heat pump that only runs in one direction Leans right “And the thing is, air conditioners ARE heat pumps.” 1 of 8 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “all it really takes is a reversing valve and a few other particulars to make that happen, I see it as a no-brainer.” 1 of 9 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “That’s often electric resistive heating which will always work but needs a ton of energy to do so.” 1 of 10 sources Electric resistance heat costs far more to run than a heat pump Probably right “it would need roughly a third the electricity of a plain resistive heater to produce the same amount of heat.” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “even on today’s fossil-fired power grid, they’re a wiser use of limited resources and can help lower emissions.” 1 of 19 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “some heat pumps like this are rated down to 20 below zero!” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “as it gets colder outside, their effectiveness is reduced.” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “this heat pump is able to move up to five and a half times as much heat energy as it actually consumes in electricity.” 1 of 35 sources	0.81	mixed
+2	Ottawa launches $2B rebate program for heat pump owners. But are they worth it? \| Hanomansing Live CBC News Show claimsNovel (1)Right (7)Wrong (0)Partly (0)Untestable (0)All (7) Canada's federal program pays up to $10,000 to switch oil-heated homes to a heat pump Probably right “The rebate for households that switch to heat pumps is up to $10,000.” only this source Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “We have a harsh winter that goes down to -30° -40° C, and they're they're fantastic to heat up the homes.” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “operational year-over-year will cost you less money to operate, especially homes in the East Coast where they're operating on heating oil” 1 of 15 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “by using less combustion, we are lowering our carbon footprint” 1 of 19 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “this is an all-in-one system. It is an air conditioner in the summertime” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “the modern heat pumps can provide a functional heat down to about minus 30°” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “even at minus 30, there's a lot of thermal energy to be absorbed” 1 of 35 sources	0.79	mixed
+2	Is Geothermal Heating and Cooling Worth the Cost? Heat Pumps Explained Undecided with Matt Ferrell Show claimsNovel (2)Right (6)Wrong (0)Partly (1)Untestable (0)All (7) Ground-source heat pumps work efficiently in almost any climate because ground temperature is stable Leans right “They can work well in almost all climates.” 1 of 2 sources Geothermal ground loops last for decades, far longer than the heat pump unit Leans right “around 50 years for the underground infrastructure” 1 of 2 sources A ground-source heat pump pays back its extra cost within about a decade Leans partly right “The typical payback and savings in the system is usually around eight to 10 years” 1 of 2 sources Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “provides homeowners a tax credit of 30% from the total installed cost of the Energy Star rated system” 1 of 7 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “Although the upfront cost of a geothermal system might be higher than a conventional HVAC system” 1 of 11 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “simply running when the electricity prices are the lowest” 1 of 24 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “it will produce three to five units of heat for the home” 1 of 35 sources	0.78	mixed
+2	Heat Pump vs Furnace: Costs, Efficiency, Comfort, and Climate Fit - PICKHVAC How to Choose Best HVAC Systems Show claimsNovel (1)Right (12)Wrong (0)Partly (1)Untestable (0)All (13) A heat pump costs about the same as or less than a new furnace plus central air conditioner Leans right “AC + Furnace (Full HVAC) $9,000–$18,000 Comparable to a single heat pump system covering both modes.” 1 of 3 sources A heat pump makes the most financial sense when the air conditioner also needs replacing Leans right “If the AC is near end-of-life, a heat pump can replace both systems at once” 1 of 4 sources Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “Income-based electrification rebates authorized by federal law are rolling out state by state” 1 of 6 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “Homes with 100A service may need upgrades, though smart panels and load-shedding devices can sometimes avoid a full service replacement.” 1 of 7 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “In freezing weather, outdoor coils accumulate frost. Heat pumps periodically reverse to melt frost, briefly pausing heating.” 1 of 8 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “This approach optimizes operating cost and comfort in cold climates without sacrificing AC efficiency.” 1 of 12 sources DENIES Heat pumps do not work in very cold climates Probably right ““Heat pumps do not work below freezing.” Modern cold-climate models heat effectively well below 32°F, many to -13°F.” 1 of 17 sources Electric resistance heat costs far more to run than a heat pump Probably right “Electric resistance heat is costly; heat pumps are 2–4× more efficient than resistance heat.” 1 of 18 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “If local electricity is lower, the heat pump is cheaper to run; if higher, the furnace wins.” 1 of 21 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “Qualifying electric heat pumps may receive up to $2,000 per year in federal tax credits.” 1 of 22 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “Many can operate down to -5°F to -13°F, maintaining a significant share of their rated capacity at 5°F.” 1 of 31 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “Operating cost depends on local electricity and gas prices, climate, equipment efficiency, and thermostat settings.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “Because it moves heat, it can deliver two to four units of heat energy per unit of electricity.” 1 of 35 sources	0.78	mixed
+2	3 years living with a heat pump - stats and my main take-away Tom Bray Show claimsNovel (1)Right (9)Wrong (0)Partly (2)Untestable (0)All (11) DENIES A heat pump pays for itself through lower energy bills within a few years Leans right “a simple calculation would suggest around 18 to 25 years” 1 of 3 sources Radiator size and flow temperature decide whether a heat pump costs less to run than a gas boiler Leans partly right “I might have asked for some bigger radiators or for some more radiators” 1 of 2 sources Running a heat pump steadily at low flow temperature costs less than heating in short bursts Leans right “what we're doing now is we're trickling in heat all the time” 1 of 4 sources DENIES Heat pumps need a home to be well insulated to work economically Leans right “this is not a particularly well insulated home” 1 of 6 sources The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “this would usually come with the Grant from the boilet upgrade scheme” 1 of 6 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “reduced our heating emissions by almost 70%” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “an average heat pump installation is now around” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “solar panels generating free P power to power our heat pump and therefore free Heat” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “octopus's smart tariffs tend to be much cheaper than the price cap when running a heat pump” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “at a price cap tariff our heat pump would have had a similar cost to run as a very efficient gas boiler” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “for every unit of electricity that we've used we've got three and a half units of heat out” 1 of 35 sources	0.77	mixed
+2	Heat Pump Tax Credit 2026: The 25C Credit Has Expired — Here's What Still Works — Energy Rebate Calculator Blog Energy Rebate Calculator Show claimsNovel (1)Right (4)Wrong (0)Partly (2)Untestable (0)All (6) DENIES Federal Inflation Reduction Act rebates for heat pumps are available to most homeowners Probably right “income-qualified households (under 150% of Area Median Income) can receive up to $8,000 for a qualifying heat pump” 1 of 2 sources Heat pumps using the phased-out R-410A refrigerant will cost more to repair as its supply shrinks Leans partly right “R-410A will become increasingly expensive and difficult to source as the phasedown advances, affecting future repair costs.” only this source Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “The catch is availability. HEAR rollout has been uneven:” 1 of 6 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “provides $5,000 to $12,000 for air-source heat pumps in residential properties of 1–4 units.” 1 of 9 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “Heat pumps installed in 2026 or later do not qualify.” 1 of 10 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “Section 25C tax credit Up to $2,000 (30% of cost) Expired Dec 31, 2025” 1 of 22 sources	0.77	mixed
+2	Rewiring America Heat Pump Incentives: What You’re Missing! Eric George \| Home Performance Pro Show claimsNovel (1)Right (4)Wrong (0)Partly (2)Untestable (1)All (7) A vetted-contractor program with negotiated pricing lowers heat pump installation costs Leans right “What the homeowners got out of that though was typically about a 20% discount on what they could have got on the street.” only this source A properly sized inverter heat pump can heat a home at its design temperature without backup resistance heat Leans partly right “I caught my system on a 16 degree morning that was maintaining 70 on the stat and producing 17,640 BTUs” only this source Inverter heat pumps defrost faster than single-stage heat pumps Unknown “most people don't realize inverters defrost really well and pretty quickly as compared to a, you know, a standard conventional style” only this source Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “Your power consumption is going to be greater. You're not going to be comfortable” 1 of 15 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “especially in my area where it's propane laden, right? We have a lot of propane and it's expensive.” 1 of 16 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “I mean you really don't want to put a heat pump on a leaky house.” 1 of 18 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “Or it may be in an area where gas is just really cheap and it also makes sense.” 1 of 31 sources	0.75	mixed
+2	Heat Pump Economics in Massachusetts Abode Energy Management Show claimsNovel (1)Right (8)Wrong (0)Partly (0)Untestable (0)All (8) Most heating hours occur at moderate temperatures where heat pumps run most efficiently Leans right “how is that heat pump performing really between here and here where we do have the most amount of hours” only this source DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “right now when we are looking at this and looking at today's fuel prices natural gas is going to be the most affordable” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “home heating oil we would see that it's always also going to be more expensive than a heat pump” 1 of 15 sources Electric resistance heat costs far more to run than a heat pump Probably right “electric resistance is over four thousand dollars while air source heat pumps are listed at close to one thousand five hundred dollars” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “significantly better than natural gas significantly better than propane home heating oil or electric resistance” 1 of 19 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “fuel prices do change and it wouldn't take much to make that heat pump the most cost-effective solution” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “as the temperature drops down to 17 degrees we'll see the coefficient of performance has dropped down to 2.64” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “they use electricity to pump heat from one location to the other” 1 of 35 sources	0.72	mixed
+2	Does a Heat Pump Actually Save Money? EnergySage Show claimsNovel (1)Right (8)Wrong (0)Partly (3)Untestable (0)All (11) A heat pump costs about the same as or less than a new furnace plus central air conditioner Leans right “Installing a heat pump often costs less than simply swapping in a new AC and furnace or boiler” 1 of 3 sources Heat pumps are a better fit than gas furnaces in mild climates Leans right “If it rarely drops below freezing where you live, a heat pump is almost a no-brainer.” 1 of 4 sources Most US households would see lower energy bills with a heat pump Leans right “Heat pumps are likely to save you money on heating and cooling, but it's not guaranteed.” 1 of 5 sources Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “heat pump payback periods are hard to pin down precisely—and that's not a cop-out.” 1 of 6 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “equipment and installation costs are lower—often barely more than a central AC alone.” 1 of 9 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “a hybrid system that automatically switches to the cheaper fuel at that crossover point can lower your annual energy costs.” 1 of 12 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “Heat pumps consistently save against propane, oil, and electric resistance heating almost everywhere.” 1 of 15 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “If you live in a cold climate and currently have natural gas for heat, a heat pump will usually cost more to run” 1 of 21 sources A heat pump costs more to buy and install than a gas furnace Leans right “the wholesale cost of a cold-climate heat pump is roughly three times the cost of a basic furnace and twice the cost of a boiler.” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “Pairing a heat pump with rooftop solar is one of the most effective ways to offset that.” 1 of 23 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “The math all depends on individual circumstances: Your home, your climate, your local energy prices and policies” 1 of 31 sources	0.71	mixed
+2	What's the true cost of a heat pump? Grist Show claimsNovel (0)Right (10)Wrong (1)Partly (1)Untestable (0)All (12) Replacing an oil furnace with a heat pump pays back within a few years Leans partly right “That means that in less than five years your heat pump will have actually paid for itself” only this source Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “Each house, installer, and climate zone means something a little bit different for heat pumps.” 1 of 6 sources Ducted heat pumps can often use a home's existing ductwork Leans right “a new air-source heat pump that will fit into existing ducts” 1 of 7 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “That state now sells more heat pumps per capita than even the heat pump crazy Scandinavian countries.” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “electricity is a lot cheaper than fuel oil and don't forget about heat pumps monster efficiency.” 1 of 15 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “if your home is heated by pretty much anything that's not natural gas, you can expect to save between $800 to $1,200 a year” 1 of 16 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “That means that you'll still be saving some money, just not quite as much.” 1 of 16 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “switching to a heat pump can save you anywhere from about 1 metric ton to about 7 metric tons of carbon emissions every single year.” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “the prices for a gas furnace are about the same, $10,500 and $6,000” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “your heat pump will also double as an A/C” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “air-source heat pumps that work when the outside temperature is down to negative 31 degrees Fahrenheit.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “it doesn't actually make heat -- it moves it.” 1 of 35 sources	0.69	mixed
+2	Heat Pumps Explained — And Tested \| Guy Martin Guy Martin Show claimsNovel (1)Right (6)Wrong (0)Partly (1)Untestable (0)All (7) The UK Boiler Upgrade Scheme grant covers most of a typical air-source heat pump installation Leans right “costs around 11,000 pounds. With a grant of 7 and 1/2 thousand pounds” only this source DENIES Heat pump outdoor units are noisy enough to cause neighbour complaints Leans partly right “loads of people say they're dead noisy. Not anymore.” only this source Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “Heat pumps incredibly unforgiving. They need to be commissioned correctly.” 1 of 15 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “running a heat pump could cut a home's CO2 emissions” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “is one of the reasons heat pumps are more expensive than [music] normal boilers.” 1 of 22 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “Trouble is, electric's four times the price of gas, so it's all meeting the middle.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “We put in one unit of electricity and we get four units of heat out, so they're 400% efficient.” 1 of 35 sources	0.68	mixed
+2	Factcheck: 18 misleading myths about heat pumps Carbon Brief Show claimsNovel (1)Right (11)Wrong (0)Partly (2)Untestable (0)All (13) A heat pump raises a home's resale value Leans right “The evidence suggests the opposite: heat pumps increase the value of properties.” 1 of 3 sources DENIES Switching from gas to a heat pump raises the household's energy bills Leans partly right “well-designed systems can save UK households hundreds of pounds a year, even though electricity is more expensive than gas.” only this source A heat pump still uses less energy than resistance heat even in very cold weather Probably right “when temperatures drop to as low as -20C, a standard air-source heat pump can still operate with a COP of around 2.” 1 of 4 sources Heat pumps last about as long as furnaces and air conditioners Leans partly right “heat pumps can last a couple decades or even longer.” 1 of 4 sources DENIES Heat pumps need a home to be well insulated to work economically Leans right “Heat pumps can work in any building if sized, designed and installed correctly.” 1 of 6 sources Removing the gas connection saves its fixed monthly charge Probably right “households can save £110 per year by disconnecting from the gas grid and no longer paying the gas “standing charge”.” 1 of 9 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “In all three countries, there are now more than 40 heat pumps per 100 households, more than in any other country in the world.” 1 of 10 sources DENIES Heat pumps do not work in very cold climates Probably right “These three countries have the highest heat pump sales per 1,000 households on the continent.” 1 of 17 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “a heat pump would cut CO2 emissions by 77-86% over 15 years compared with a gas boiler” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “It is true that heat pumps are more expensive to buy than gas boilers.” 1 of 22 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “heat pump users can lower their operating costs through using dedicated tariffs.” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “The running costs of heat pumps relative to gas boilers depend on energy prices and the efficiency of the heat pump installation.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “heat pumps use electricity to gather extra heat from the outside air or ground, meaning they typically generate at least 2 units of heat” 1 of 35 sources	0.68	mixed
+2	Five policies to lower heating bills and accelerate heat pump adoption in Illinois RMI Show claimsNovel (0)Right (10)Wrong (0)Partly (3)Untestable (0)All (13) Incentives can make a heat pump cheaper upfront than a furnace and air conditioner Leans partly right “would likely make a heat pump less expensive than installing a new AC and furnace” 1 of 3 sources A heat pump makes the most financial sense when the air conditioner also needs replacing Leans right “replacing a failing central AC represents one of the easiest and lowest-cost opportunities to scale ASHP adoption” 1 of 4 sources Heat pump water heaters use far less energy than conventional water heaters Leans right “Heat pump water heaters (HPWHs) can also deliver meaningful bill savings, as they are three to four times more efficient than conventional units.” 1 of 4 sources A heat pump can be added alongside an existing furnace to cut fuel use Leans right “a hybrid ASHP sized to the cooling load and paired with the existing furnace for supplemental heat (i.e., part-load ASHP) reduces energy bills the most” 1 of 6 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “they still have a cost premium relative to AC-only replacements — typically around $1,000 to $2,000” 1 of 9 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “residents upgrading from electric resistance or propane furnaces could reduce their annual energy bills by an average of $1,110 and $930” 1 of 15 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “Households heated with propane and electric resistance see the largest annual bill savings ($930 and $1,110, respectively) with all-electric heat pumps.” 1 of 16 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “Weatherization can play a critical role in improving heat pump affordability” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “heat pumps installed today can cut lifetime operational emissions by over 50% compared to a gas furnace in Illinois” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “they typically have an up-front cost premium relative to traditional system replacements” 1 of 22 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “to ComEd’s electric heating rate, which offers lower electricity prices” 1 of 24 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “Full-load cold climate heat pumps replace both a furnace or boiler and an air conditioner (AC).” 1 of 25 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “For gas-heated homes, the bill savings vary by heat pump design and utility territory.” 1 of 31 sources	0.68	mixed
+2	3 ways heat pumps save you money homes.rewiringamerica.org Show claimsNovel (1)Right (6)Wrong (0)Partly (1)Untestable (0)All (7) DENIES A heat pump pays for itself through lower energy bills within a few years Leans right “with their energy bill savings, a heat pump will often pay off in about 15 years” 1 of 3 sources Federal IRA rebates can cover most or all of a heat pump's cost for low-income households Leans partly right “The rebate’s upfront discounts will cover up to 100 percent of point-of-sale purchases for low-income households” only this source Most US households would see lower energy bills with a heat pump Leans right “The average homeowner will save $370 per year by upgrading to a heat pump.” 1 of 5 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “plus utility bill savings and lower maintenance costs” 1 of 9 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “systems that run on fuel oil, propane, or traditional electric resistance (like baseboard heat or electric furnaces) will save closer to $1,000 per year” 1 of 16 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “Your household can receive a 30 percent tax credit each year (up to $2,000) to buy and install heat pumps” 1 of 22 sources A heat pump costs more to buy and install than a gas furnace Leans right “Heat pumps cost more upfront (average heat pump installation is $16,000)” 1 of 22 sources	0.67	mixed
+2	Dual Fuel HVAC \| This Old House This Old House Show claimsNovel (1)Right (4)Wrong (0)Partly (1)Untestable (0)All (5) Outdoor heat pump units in cold climates must sit above the snow line Leans right “In a cold climate like this, we've got to make sure it's above the snow line” only this source A heat pump can be added alongside an existing furnace to cut fuel use Leans right “We found this 92% furnace here, and instead of throwing it away, we said it's got plenty of life left.” 1 of 6 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “homeowner can decide based on the cost of fuel whether they want to go with gas or heat pump.” 1 of 12 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “And what will this heat down to? Al: Negative 22.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “what it's trying to do is to find heat even in the cold air outside” 1 of 35 sources	0.65	mixed
+2	Winter Performance Review after Mr Cool Universal Heat Pump install: heating cost & tips HouseBarons Show claimsNovel (1)Right (3)Wrong (0)Partly (2)Untestable (0)All (5) Snow and ice buildup on the outdoor unit can stop a heat pump from heating Leans right “making sure that in in a high snow area that those fins don't get blocked” 1 of 3 sources DIY-installable heat pumps cost far less than contractor-installed systems Leans partly right “the price of mr cool and its installation was dramatically less than the quotes that we had” only this source A heat pump makes the most financial sense when the air conditioner also needs replacing Leans right “our air conditioner condenser died and so they're going to just replace the condenser” 1 of 4 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “it's more expensive to run electric than gas but not dramatically so” 1 of 7 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “more than capable of heating the house even at below zero temperatures without crazy utility bills” 1 of 31 sources	0.61	mixed
+2	MYTHS about Heat Pumps! HVAC Guide for Homeowners Show claimsNovel (2)Right (4)Wrong (0)Partly (0)Untestable (0)All (4) With electric backup, the heat pump keeps running alongside the heat strips to cut backup use Leans right “unlike a dual fuel system it's not going to turn off the outdoor unit the outdoor unit's still going to run” 1 of 2 sources Setting an auxiliary heat lockout temperature keeps backup strip heat from running in mild weather Leans right “a lot of thermostats have backup timers” 1 of 2 sources Electric resistance heat costs far more to run than a heat pump Probably right “the heat pump draws less electricity than when those heat strips turn on” 1 of 18 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “if it got below 40 degrees outside heat pumps started to struggle to provide heat but those days are over” 1 of 31 sources	0.55	mixed
+2	25C Heat Pump Federal Tax Credits: A Guide homes.rewiringamerica.org Show claimsNovel (1)Right (3)Wrong (0)Partly (0)Untestable (0)All (3) The federal heat pump tax credit was nonrefundable, so it gave nothing to households without tax liability Very likely right “The 25C tax credit is “non-refundable,” which means that you can't get back more than you pay in federal income taxes.” 1 of 2 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “heat pump purchases or installations completed after Dec. 31, 2025 are not eligible for the 25C tax incentive.” 1 of 10 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “The 25C Energy Efficient Home Improvement Tax Credit provides a tax credit for eligible heat pumps up to 30% of project costs, capped at $2,000.” 1 of 22 sources	0.55	mixed
+2	Contractor Contractor Magazine Show claimsNovel (1)Right (5)Wrong (0)Partly (0)Untestable (0)All (5) Heat pumps in cold climates may need a backup heat source on the coldest days Probably right “Elizabeth's heat pump ran as a straight-electric heater for many weeks this past winter” 1 of 2 sources Heat pump water heaters use far less energy than conventional water heaters Leans right “The DHW is now being frugally produced with a heat pump water heater” 1 of 4 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “Next year's energy bills, for this young family of three, will be slashed dramatically.” 1 of 15 sources Electric resistance heat costs far more to run than a heat pump Probably right “you heat your home with those resistive electric elements — the most expensive way to heat” 1 of 18 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “without the need for any back-up heating and do so at outdoor temperatures well below 0°F” 1 of 31 sources	0.55	mixed
+2	Best Heat Pump Buying Guide - Consumer Reports Consumer Reports Show claimsNovel (0)Right (9)Wrong (0)Partly (3)Untestable (0)All (12) Incentives can make a heat pump cheaper upfront than a furnace and air conditioner Leans partly right “with state- or utility-based subsidies, such as tax incentives or cash rebates, a heat pump can cost less than other heat-only systems.” 1 of 3 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “may advise hiring an electrician to upgrade to the modern standard of 200 amps. That work could cost a couple of thousand dollars.” 1 of 7 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “it may make sense to pay a little extra for a heat pump and keep your existing heating system as a backup” 1 of 9 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “those tax credits expired at the end of 2025, after Congress rolled back incentives for home energy-efficiency improvements.” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “you’re likely to save money over time if you switch to a heat pump, even when you include the cost of installing it.” 1 of 15 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “an oversized unit will cost more, and if it isn’t a variable-speed model, it will cycle on and off more often than it should.” 1 of 15 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “it’s always a good idea to first upgrade your insulation and seal any air leaks, regardless of how you heat the house.” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “Switching from a gas furnace to an electric-powered heat pump will reduce a home’s heating-related carbon emissions by 40 to 70 percent” 1 of 19 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “able to get a tax credit worth 30 percent of the cost to buy and install qualifying heat pumps, up to $2,000.” 1 of 22 sources A heat pump costs more to buy and install than a gas furnace Leans right “paid a median price of $8,348 to purchase and install a heat pump vs. $6,221 for a gas furnace.” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “A heat pump heats and cools your home, functioning like a combined furnace and central air conditioner.” 1 of 25 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “All air-source heat pumps struggle to perform as temperatures drop; the space they can effectively heat shrinks, and they don’t work as efficiently.” 1 of 34 sources	0.51	mixed
+2	Heat Pump vs Furnace: Think TWICE Before Switching Jordan Dearden Show claimsNovel (1)Right (9)Wrong (0)Partly (3)Untestable (0)All (12) Heat pumps deliver cooler supply air than a gas furnace, which some people find less comfortable Leans right “A heat pump puts out air that's typically 85° to 95°.” 1 of 3 sources Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “won't be around long enough for the efficiency savings to pay back the install costs.” 1 of 6 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “They'll also absolutely destroy your electric bill.” 1 of 10 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “Geothermal is the most efficient heating and cooling system available. Period. It's also the most expensive to install.” 1 of 11 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “Run the heat pump when it's cheaper than gas. Switch to the furnace when gas is cheaper than backup strips.” 1 of 12 sources Electric resistance heat costs far more to run than a heat pump Probably right “That's just an expensive space heater with better marketing.” 1 of 18 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “up to two $2,000 in federal tax credits for qualifying heat pumps” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “If you've got solar panels, the math gets even better.” 1 of 23 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “But from a heat pump running about 300% efficiency, about a dollar 11. Actually slightly cheaper than gas at current rates.” 1 of 31 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “continue to [clears throat] provide heat down to minus 13 or colder.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “The colder it gets, the less heat there is to pull out of the air, and the less efficient it becomes.” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “A heat pump doesn't create heat, it moves heat.” 1 of 35 sources	0.50	mixed
+2	Electric bill shock! How to avoid 'emergency heat' costs WSPA 7News Show claimsNovel (1)Right (3)Wrong (0)Partly (1)Untestable (0)All (4) A faulty heat pump can run unnoticed on backup resistance heat and send bills soaring Leans right “IF THE HEAT PUMP FAILS IN THAT SAME UNIT, YOU WON'T KNOW IT BECAUSE OF THE AUXILIARY POWER.” 1 of 2 sources Running a heat pump steadily at low flow temperature costs less than heating in short bursts Leans right “MANY TECHNICIANS ADVISE YOU TO NOT CHANGE THE THERMOSTAT IF YOU GO AWAY ON A SHORT VACATION OR EVEN AT NIGHT.” 1 of 4 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “THEY SAY THAT POWER KICKS IN WHEN TEMPERATURES DIP BELOW 40 TO 35” 1 of 10 sources Electric resistance heat costs far more to run than a heat pump Probably right “THE AUXILIARY POWER OR EMERGENCY HEAT KICKS IN AND THAT SUCKS THREE TIMES THE ENERGY.” 1 of 18 sources	0.46	mixed
+2	Major Advances with Heat Pumps in the Extreme Cold Undecided with Matt Ferrell Show claimsNovel (0)Right (9)Wrong (1)Partly (1)Untestable (0)All (11) A heat pump still uses less energy than resistance heat even in very cold weather Probably right “cold climate heat pumps (CCHPs), like this one, still perform more efficiently than an electric-resistance heater or fuel-fired system.” 1 of 4 sources Heat pumps last about as long as furnaces and air conditioners Leans partly right “have an average lifespan of 15 to 20 years” 1 of 4 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “at very low temperatures, frost can accumulate over the exterior coil, which further reduces efficiency.” 1 of 8 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “Heat pumps require less professional maintenance than combustion systems” 1 of 9 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “This has the potential to save you approximately $300 or more annually.” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “the upfront installation costs can be hefty.” 1 of 22 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “households can claim a tax credit for 30% of the cost of buying and installing a heat pump, up to $2,000!” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “Heat pumps are versatile, efficient, and great for both heating and cooling” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “So, the cold isn't really a problem anymore outside of the most extreme circumstances.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “they don’t work as well in cold weather when you need them most.” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “The system is just moving preexisting heat around” 1 of 35 sources	0.45	mixed
+2	Heat Pumps Need One Thing to BEAT Gas Boilers (Most Homes Don't Have It) Heatable Show claimsNovel (0)Right (9)Wrong (0)Partly (1)Untestable (0)All (10) The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “you should be able to get a grant for 7 and 1/2 thousand pounds towards the cost of moving away from a gas boiler” 1 of 6 sources Removing the gas connection saves its fixed monthly charge Probably right “if you remove your gas meter, then you won't have to pay standing charges” 1 of 9 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “There isn't a huge leap between these two technologies when it comes to the running costs.” 1 of 10 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “having an air source heat pump rather than one of those boilers is going to be way cheaper to run” 1 of 15 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “usually a poorly designed system that's been installed on the cheap will cost more to run” 1 of 15 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “that current spark gap means it isn't automatically cheaper to run than say a high efficiency gas boiler” 1 of 21 sources A heat pump costs more to buy and install than a gas furnace Leans right “an air source heat pump right now, on average, is about 4.3 times higher than a gas boiler install” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “completely turns the tables in favor of an air source heat pump and it's combining one of those with solar” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “several moments when energy prices dropped significantly and that closed that spark gap and made the air source heat pump cheaper to run” 1 of 24 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “because it's moving heat rather than creating it, it is way more efficient” 1 of 35 sources	0.44	mixed
+2	Geothermal heat pumps don''t make sense financially, so why do we always use them? Battery Builds with Alan Knudson Show claimsNovel (0)Right (4)Wrong (0)Partly (1)Untestable (1)All (6) Geothermal heat pumps rarely pay back their extra cost over an efficient air-source heat pump Leans partly right “the efficiency you gain doesn't pay for itself over the life of the system which is the case in most situations” only this source In off-grid homes a geothermal heat pump can cost less overall by shrinking the solar and battery system needed Unknown “so the total system savings is 46 Grand as you know geothermal 20 to 25 grand extra this is a pretty good deal” only this source DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “now obviously gas would do better than geothermal and would be cheaper” 1 of 10 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “they're really expensive to put in they're usually 20 to $30,000 more than an air source heat pump” 1 of 11 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “propane maybe not it could be really expensive to eat a house like this on propane even in a relatively warm climate zone 3” 1 of 15 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “they vary their efficiency with the outside air temperature” 1 of 34 sources	0.41	mixed
+2	Heat Pump vs Gas Furnace Running Cost by State 2026 jouleio.com Show claimsNovel (0)Right (9)Wrong (0)Partly (0)Untestable (0)All (9) Removing the gas connection saves its fixed monthly charge Probably right “Dropping gas entirely removes the gas utility's fixed monthly customer charge, which the per-Btu table ignores.” 1 of 9 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “at national average prices gas is slightly cheaper per unit of heat than a heat pump running at COP 3.0.” 1 of 10 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “No federal 25C credit for heat pumps placed in service after December 31, 2025.” 1 of 10 sources Electric resistance heat costs far more to run than a heat pump Probably right “A heat pump at COP 3.0 delivers the same heat for one-third the electricity, $17.89.” 1 of 18 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “expensive-electricity, cheap-gas states (Alaska, Michigan, New York) favor gas.” 1 of 21 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “The Section 25C credit (30%, up to $2,000 for qualifying heat pumps) ended for property placed in service after December 31, 2025.” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “A heat pump is also your air conditioner.” 1 of 25 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “It depends on the ratio of your electricity price to your gas price.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “In a very cold climate a standard unit spends hours near COP 1.5 to 2.0 and may fall back to resistance strips” 1 of 34 sources	0.38	mixed
+2	Heat pumps have so far withstood the death of federal tax credits Canary Media Show claimsNovel (0)Right (2)Wrong (0)Partly (1)Untestable (0)All (3) Federal tax credits were not a major driver of heat pump adoption Leans partly right “It could be that the tax credit was never a determining factor for most people getting heat pumps” only this source DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “The 25C tax credit for heat pumps, which shaved up to $2,000 off the price tag, expired at the end of 2025” 1 of 10 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “heat pumps — which can both cool and warm homes and wean buildings off polluting gas furnaces” 1 of 25 sources	0.36	mixed
+2	What to Know Before Switching to Whole House Heat Pumps \| Ask This Old House This Old House Show claimsNovel (0)Right (5)Wrong (0)Partly (1)Untestable (0)All (6) Existing ductwork can be too small for the airflow a heat pump needs Leans right “because it's a lower temperature air you probably have to deliver more of that air” 1 of 4 sources A heat pump can be added alongside an existing furnace to cut fuel use Leans right “they have the ability to use the old existing heating system if they need to when it gets really cold out” 1 of 6 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “the more expensive like resistant electric the easier it is to knock them off and say yes this is a good idea” 1 of 16 sources Electric resistance heat costs far more to run than a heat pump Probably right “historically electric baseboard has been the most expensive system to heat a building” 1 of 18 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “the next one is leakage and making sure that it's insulated especially if this is running in an unconditioned attic” 1 of 18 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “at gas where it may be cheaper maybe not so much” 1 of 31 sources	0.33	mixed
+2	A Guide to Cutting Costs with Heat Pumps \| Rewiring America homes.rewiringamerica.org Show claimsNovel (0)Right (7)Wrong (0)Partly (0)Untestable (0)All (7) Most US households would see lower energy bills with a heat pump Leans right “For most American homeowners, one of the best ways to save money and energy is to switch to an electric heat pump” 1 of 5 sources DENIES Heat pumps need a home to be well insulated to work economically Leans right “If your home is poorly insulated then you probably spend a lot of money to heat and/or cool your home. And that means more opportunity” 1 of 6 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “Heat pumps also require less maintenance than combustion heating systems, which means lower repair and maintenance costs.” 1 of 9 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “the biggest savings will come if you switch from fuel oil, propane, or electricity as your main source of heat.” 1 of 16 sources DENIES Heat pumps do not work in very cold climates Probably right “Heat pumps work in both warm and cold climates.” 1 of 17 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “Because of current prices, switching to a heat pump from natural gas doesn’t save much on average.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “these heating and cooling machines are anywhere between 2-4x more efficient than traditional furnaces and boilers.” 1 of 35 sources	0.32	mixed
+2	New winter rates saved at least $37M for Massachusetts heat-pump… Canary Media Show claimsNovel (0)Right (3)Wrong (0)Partly (2)Untestable (0)All (5) Standard volumetric electricity rates overcharge heat pump owners for grid delivery costs Leans partly right “The logic behind these discounts is that traditional electricity rates overcharge heat pump owners for their share of grid construction and upkeep.” only this source Switching from gas to a heat pump raises the household's energy bills Leans partly right “72% of current natural gas customers would save money by switching to a heat pump if discounted rates were adopted, up from 27%” 1 of 7 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “Worries about high electricity rates, however, have been a more stubborn barrier to adoption, particularly for homeowners heating with natural gas” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Massachusetts consumers with home heat pumps saved some $37 million on their power bills — an average of more than $250 per customer” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “That number jumps to 64% with the existing heat pump discount and could go up to almost 82% if the deeper proposed cuts are implemented.” 1 of 31 sources	0.32	mixed
+2	Cold Climate Heat Pumps: Everything You Need to Know - Trane® Trane Residential Show claimsNovel (0)Right (3)Wrong (0)Partly (2)Untestable (0)All (5) Cold-climate heat pumps are suitable for every US climate Leans partly right “Trane’s heat pumps for cold climates are suitable for all areas of the United States.” only this source A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “on those extremely cold days, the furnace takes over to help ensure maximum comfort and maximum heating efficiency.” 1 of 12 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “they act as an energy-efficient air conditioner in the summer.” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “can provide up to 107% heating capacity down to 5°F and up to 85% down to -20°F.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “many systems will start to lose delivered heating capacity as it gets colder outside” 1 of 34 sources	0.28	mixed
+2	Gas Furnace vs Heat Pump Monkey Wrench Plumbing, Heating, Air & Electric Show claimsNovel (0)Right (7)Wrong (0)Partly (0)Untestable (0)All (7) Heat pumps are a better fit than gas furnaces in mild climates Leans right “a heat pump system particularly an air source heat pump is often a better fit due to the mild climate” 1 of 4 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “require less upkeep since they do not burn fossil fuels” 1 of 9 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “air source heat pumps produce fewer carbon emissions” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “you can expect a higher upfront invest cost with heat pumps” 1 of 22 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “there's no need to install a separate cooling system like an air conditioner” 1 of 25 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “your choice between them depends on your local gas and electricity rates” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “anything below 40° will cause the heat pump's efficiency to slip” 1 of 34 sources	0.28	mixed
+2	Heat Pump Cost Comparison: Winter heating vs. Gas Furnace Scott Explains Show claimsNovel (0)Right (5)Wrong (0)Partly (1)Untestable (0)All (6) Inverter-driven heat pumps run more efficiently and quietly than single-stage units Leans right “we wanted something much quieter more efficient and variable speed” 1 of 4 sources Electric resistance heat costs far more to run than a heat pump Probably right “it's much more expensive when you're heating with traditional heat strips” 1 of 18 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “electricity at the standard rate 11 more expensive than heating with gas” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “in my case i'm not paying the standard rate i have solar and i also have battery storage” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “i'm on a time of use rate plan” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “in total there was 18 states where gas is cheaper and 33 states for electricity and the heat pump is cheaper” 1 of 31 sources	0.25	mixed
+2	Heat pump in Canada - Does it work long term? Your Electric Neighbour Show claimsNovel (0)Right (4)Wrong (0)Partly (1)Untestable (0)All (5) A heat pump cools as efficiently as a comparable central air conditioner Leans right “cool your house in the summertime way better than your your current um central air conditioners” 1 of 6 sources Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “if your equipment's working great for you wait till it breaks down and then replace it” 1 of 6 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “I've owned my heat pump in Canada uh for two and a half Winters now” 1 of 10 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “I offset that with solar so at the end of the day um it's a wash” 1 of 23 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “we're using only the heat pump to heat our house at this point” 1 of 31 sources	0.24	mixed
+2	Heat Pumps Don’t Work In Winter??? (Sub Zero Temps) Electric Vehicle Man Show claimsNovel (0)Right (5)Wrong (0)Partly (0)Untestable (0)All (5) DENIES Heat pumps need a home to be well insulated to work economically Leans right “I haven't hyper insulated anything it's the same insulation as we had with the gas boiler” 1 of 6 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “they've used them for decades in much colder countries such as Scandinavian countries” 1 of 10 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “someone doing a bad install it will cost you a lot of money and that is what is ruining the heat pump reputation” 1 of 15 sources DENIES Heat pumps do not work in very cold climates Probably right “that's what the radiators are at and yet my house is still warm” 1 of 17 sources A heat pump costs more to buy and install than a gas furnace Leans right “they are financially viable for a lot of people they're not quite frankly they're very expensive” 1 of 22 sources	0.23	mixed
+2	Heat Pumps \| Mass Save Mass Save Show claimsNovel (0)Right (7)Wrong (0)Partly (1)Untestable (0)All (8) DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “Heat pumps require minimal maintenance and can eliminate the hassle of scheduling fuel deliveries.” 1 of 9 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “In many cases, that additional electrical use is offset by savings elsewhere, such as a propane or oil heating fuel bill.” 1 of 15 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “Before upgrading your heating system, consider preliminary measures, such as sealing and insulating your ductwork or completing weatherization work.” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “Heat pumps have the lowest carbon emissions of any heating source.” 1 of 19 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Seasonal Heat Pump Rate, which offers lower electric rates from November through April to help make heat pump operation more affordable.” 1 of 24 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “Heat pumps can efficiently heat in the winter and double as a cooling system in the summer” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “many provide efficient heat at outdoor temperatures as low as -15 °F” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “Today’s cold climate heat pumps are 2-3x as efficient as a boiler or furnace” 1 of 35 sources	0.20	mixed
+2	For Most Americans, A Heat Pump Can Lower Bills Right Now Energy.gov Show claimsNovel (0)Right (3)Wrong (0)Partly (1)Untestable (0)All (4) Most US households would see lower energy bills with a heat pump Leans right “for over 90% of American households assessed,[1] replacing worn-out heating equipment with the right heat pump[2]—one that matches the home’s needs—will save on energy bills” 1 of 5 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “savings are generally highest for homes that are currently using heating oil, propane, or older electric equipment” 1 of 16 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “investing in envelope upgrades like insulation and air sealing can mean that the cost of purchasing and installing a heat pump” 1 of 18 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “It also created the Energy Efficiency Home Improvement tax credit — up to $2,000 per household per year for 10 years — for heat pumps” 1 of 22 sources	0.20	mixed
+2	Why aren't we all using heat pumps? Simon Clark Show claimsNovel (0)Right (5)Wrong (0)Partly (1)Untestable (0)All (6) State and utility rebates can cover a large share of a heat pump's cost Leans partly right “your local government will give you thousands of dollars in rebates to do so” 1 of 9 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “just ask Scandinavians in Norway Finland and Sweden” 1 of 10 sources DENIES Heat pumps do not work in very cold climates Probably right “if you've ever heard that heat pumps don't work in cold climates you can probably thank your local gas company” 1 of 17 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “a heat pump is an appliance that can both heat and cool a building” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “today's heat pumps work down to -20° F or or -30° C” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “they move heat rather than generate it” 1 of 35 sources	0.17	mixed
+2	FAQs for modification of sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, AND 179D under Public Law 119-21, 139 Stat. 72 (July 4, 2025), commonly known as the One, Big, Beautiful Bill (OBBB) \| Internal Revenue Service irs.gov Show claimsNovel (0)Right (2)Wrong (0)Partly (0)Untestable (0)All (2) Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “Residential clean energy credit The credit will not be allowed for any expenditures made after December 31, 2025.” 1 of 7 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “The credit will not be allowed for any property placed in service after December 31, 2025.” 1 of 10 sources	0.16	mixed
+2	Federal Tax Credits for Energy Efficiency ENERGY STAR Show claimsNovel (0)Right (2)Wrong (0)Partly (1)Untestable (0)All (3) Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “a 30 percent income tax credit for clean energy equipment, such as rooftop solar, wind energy, geothermal heat pumps and battery storage” 1 of 7 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “if you are considering upgrading your heating and cooling system, it is wise to optimize your attic insulation first” 1 of 18 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “These energy efficient home improvement credits are available for 30% of costs - up to $2,000” 1 of 22 sources	0.12	mixed
+2	Do Heat Pumps Really Work in Cold Climates? Bosch Home Comfort Show claimsNovel (0)Right (4)Wrong (0)Partly (0)Untestable (0)All (4) DENIES Heat pumps do not work in very cold climates Probably right “the belief that heat pumps can’t work in low temperatures is a common misconception” 1 of 17 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “Switching to a heat pump is a great way to reduce your home’s carbon footprint” 1 of 19 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “The unit will continue to initiate heating even down to the bone-chilling temperature of -13°F” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “the colder it is outside, the more difficult it is to extract heat from the outside air” 1 of 34 sources	0.10	mixed
+2	Seriously good cold-climate heat pumps are headed to the US market Electrek Show claimsNovel (0)Right (2)Wrong (0)Partly (0)Untestable (0)All (2) DENIES Heat pumps do not work in very cold climates Probably right “These cold climate heat pumps (CCHPs) reliably delivered heat even during the coldest winter months” 1 of 17 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “with some units operating at temperatures as low as –15F (–26C) while still meeting energy efficiency requirements.” 1 of 31 sources	0.05	mixed
+1	Home Energy Tax Credits 2026: What Expired and What's Left The Rebate Report Show claimsNovel (3)Right (6)Wrong (1)Partly (0)Untestable (0)All (7) State and utility heat pump rebates were not affected by the 2025 federal budget law Leans right “Your state and local programs and your utility company rebates were not touched by this federal law at all.” only this source Heat pumps installed in 2025 can still get the federal credit on the 2025 tax return Very likely right “Work that was finished during 2025 still counts.” only this source The federal 30% credit for geothermal heat pumps ended after 2025 Probably right “It also covered home battery storage systems, geothermal heat pumps, small wind systems, and more.” only this source Federal Inflation Reduction Act rebates for heat pumps are available to most homeowners Probably wrong “the appliance rebate program, which pays you up to $14,000 to install efficient equipment like heat pumps” 1 of 2 sources Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “administered by each individual state and they are rolling out across the country throughout 2026.” 1 of 6 sources DENIES A federal tax credit for heat pumps is available for installations in 2026 Very likely right “the tax credit for heat pumps expired, but the rebate program for heat pumps survived” 1 of 10 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “And critically, it also covered efficient heating and cooling equipment, including heat pumps.” 1 of 22 sources	2.09	new and sound
+1	The TRUE Payback Time for Heat Pumps Heat Geek Show claimsNovel (2)Right (7)Wrong (2)Partly (4)Untestable (0)All (13) Payback should count only a heat pump's extra cost over the system you would replace anyway Leans right “deduct the cost of what you would have spent replacing your boiler with a newer model” only this source A heat pump raises a home's resale value Leans right “the value of your property would have increased” 1 of 3 sources In a new build a heat pump costs little more than a gas boiler, and skipping a gas connection can make it cheaper Leans partly right “it's probably much cheaper in most cases to have a heat pump than it is gas boiler in a new build” only this source Most of a retrofit heat pump's cost is installation labour and radiators, so prices will fall little with scale Leans partly right “the vast majority of work is putting in pipe and installing radiators” only this source Heat pumps need more maintenance or repairs than gas furnaces Leans wrong “roughly 100 to 300 pounds plus v80 for a heat pump service” 1 of 3 sources Heat pumps last about as long as furnaces and air conditioners Leans partly right “heat pumps life should be more like 20 years” 1 of 4 sources Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “if you've got a new working boiler the argument for having a heat pump is much much lower” 1 of 6 sources The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “currently we have the bus or boiler upgrade screen which brings down your return investment by another 5k” 1 of 6 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “poor heat pump installations will cost 25 more than an old inefficient boiler” 1 of 15 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “new efficient heat pump systems designed well and installed well will be 32 percent more efficient or cheaper to run” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “compared to the what two and a half grand for a typical kind of boiler swap” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “allows you to store free solar power driving your costs down even more” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “heat pumps can make use of time of use tariffs” 1 of 24 sources	1.44	new and sound
+1	Old HVAC industry practices are holding us back and costing us money. But we can fix it. Technology Connections Show claimsNovel (3)Right (8)Wrong (1)Partly (3)Untestable (0)All (12) A home's true heating load can be estimated from smart thermostat runtime on a cold day Leans right “All you need to do is find a day where it was extremely cold” only this source Contractors routinely oversize heating and cooling equipment Leans right “even respectable, well-known installers in my area are routinely putting way more heating capacity into homes than those homes actually need” 1 of 3 sources Heat pump installation quotes vary widely between contractors for similar equipment Leans right “people getting $20,000 or even $30,000 quotes to install equipment” 1 of 3 sources DENIES Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “in many places they just aren’t. Heck, they’re barely required here in the frozen tundra of Illinois.” 1 of 2 sources DENIES Installing a heat pump can require costly electrical panel or service upgrades Leans wrong “Many folks would consider that an insurmountable barrier to electrification” 1 of 2 sources A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “Because the heat pump part IS THE SAME THING as an AC replacement.” 1 of 3 sources Ducted heat pumps can often use a home's existing ductwork Leans right “they’re fine for the heat pump that they actually need” 1 of 7 sources An air conditioner is a heat pump that only runs in one direction Leans right “They’re just air conditioners equipped with an extra valve so they can operate in reverse to produce heat!” 1 of 8 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “Add more of that to your home and all this gets easier!” 1 of 18 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “their heat pump could produce all the heat they needed” 1 of 31 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “costs I cannot give a blanket statement yet” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “we can end up with 3 or sometimes even 4 times as much energy inside our homes than we spend to collect it” 1 of 35 sources	1.12	new and sound
+1	Here's how to take the sting out of the cost of installing a heat pump Electrek Show claimsNovel (2)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) High installation costs keep heat pumps from paying off for many households Probably right “Heat pumps may only be financially feasible for a smaller portion of households due to high installation costs.” only this source Natural gas costs much less than electricity per unit of energy delivered to the home Very likely right “natural gas prices are much lower than electricity prices on a BTU basis in many parts of the US.” 1 of 3 sources Federal Inflation Reduction Act rebates for heat pumps are available to most homeowners Probably wrong “There are Inflation Reduction Act rebates and tax credits to be had right now for heat pumps” 1 of 2 sources Most US households would see lower energy bills with a heat pump Leans right “62% to 95% of households, depending upon heat pump efficiency – using a heat pump would see a drop in their energy bills.” 1 of 5 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “For the 49 million homes that use electricity, fuel oil, or propane for heat and have AC, 92-100% of homes would see energy bill savings” 1 of 16 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “homeowners could “save thousands of dollars on average” by installing a smaller heat pump if they first improve their houses’ energy efficiency” 1 of 18 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “households get a 30% tax credit for heat pumps and heat pump water heaters, capped at $2,000 per year” 1 of 22 sources	1.05	new and sound
+1	Home Electrification: There's not a lot to do, and it doesn't have to be hard (Part 1) Technology Connections Show claimsNovel (2)Right (5)Wrong (2)Partly (3)Untestable (0)All (10) Replacing a hot-water boiler with a heat pump takes more work than replacing a forced-air furnace Leans right “There are heat pumps which are designed to replace boilers, but they’ll be a bit more work” only this source Contractors routinely oversize heating and cooling equipment Leans right “find out just how oversized your heating system is, which around here they almost always seem to be by a factor of 2” 1 of 3 sources Load management or smart panels let most homes electrify on 100-amp service without a service upgrade Leans partly right “they can eliminate the expense of a service upgrade” only this source Backup resistance heat strips rarely run in a home with a heat pump Leans wrong “heat strips are rarely needed when you have a heat pump” only this source DENIES Installing a heat pump can require costly electrical panel or service upgrades Leans wrong “Except, uh, they do. Almost always.” 1 of 2 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “why spend the $50 on a reversing valve when gas is cheap?” 1 of 9 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “More insulation and better windows and doors will go hand-in-hand with building electrification” 1 of 18 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “Heat pumps that work effectively below -10°F are just around the corner” 1 of 31 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “I’m not going to go into operating cost comparisons here as that’s a very local consideration” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “spend 3 kW of power running the pump and get 9 or even 12 kW of heat energy out of it” 1 of 35 sources	1.01	new and sound
+1	The Trouble With Heat Pumps Sabine Hossenfelder Show claimsNovel (1)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) Heat pumps heat radiators to lower temperatures than gas or oil boilers Leans right “They might reach just about 50 degrees Celsius or so while a typical gas or oil heating reaches 70 degrees or more.” only this source Surveys showing heat pump owners are as satisfied as gas boiler owners rely on unrepresentative samples Leans partly right “the heat pump owners we surveyed were demographically very different to the gas boiler owners” only this source Heat pumps need a home to be well insulated to work economically Leans wrong “heat pumps, at least so far, don't work well in old houses because they just don't get warm enough” 1 of 3 sources Heat pumps on radiator systems often need larger radiators to run efficiently Leans right “New heat emitters were needed with 93% of the heat pumps installed as the existing radiators would have been too small” 1 of 4 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “Sweden, Norway and Finland lead the way in adoption with 40 percent of households using heat pumps already.” 1 of 10 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “an estimate from the USA says that they would go down by a similar factor” 1 of 19 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “They typically have half to a third of the energy needs of a typical fossil fuel heating.” 1 of 35 sources	0.98	mixed
+1	Heat Pump Vs. Furnace - Which is BETTER? Atlas AC Show claimsNovel (2)Right (7)Wrong (2)Partly (2)Untestable (0)All (11) A gas furnace can run on a small generator during a power outage while a heat pump cannot Leans right “a small generator can easily power a furnace” only this source Heat pumps deliver cooler supply air than a gas furnace, which some people find less comfortable Leans right “we can clearly see that a gas system gets quite a bit hotter than a heat pump” 1 of 3 sources DENIES Heat pumps last about as long as furnaces and air conditioners Leans partly right “it both Heats and cools so that means it runs year round so it ends up wearing out a little bit faster” 1 of 3 sources A heat pump pays for itself through lower energy bills within a few years Leans wrong “the increased cost to convert a gas system to a heat pump could be offset in savings by year five” 1 of 4 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “you're going to need to add a couple Breakers at the pan panel and run new electrical wiring to the indoor unit” 1 of 7 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “it would essentially be air conditioning your house for about 5 minutes and would melt all the frost off the outdoor unit” 1 of 8 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “for dual fuel it's going to be closer to $5,000” 1 of 12 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “heat pumps are more energy efficient than gas systems and should be able to save you $300 to $500 in energy cost each year” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “for upfront cost the furnace is going to be the cheapest the heat pump is going to be the most expensive” 1 of 22 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “the federal tax credit for qualified heat pump systems offers around $2,000 in tax credits” 1 of 22 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “in freezing temperatures the heat pump is going to struggle some” 1 of 34 sources	0.92	mixed
+1	Heat Pump Tax Credits \| Inflation Reduction ACT 🔥💰 The Thought Provocateur Show claimsNovel (1)Right (6)Wrong (1)Partly (2)Untestable (0)All (9) The federal heat pump tax credit was nonrefundable, so it gave nothing to households without tax liability Very likely right “if you don't have a tax liability for the year there's no tax benefit to putting in any of this equipment” 1 of 2 sources A federal tax credit for heat pumps is available for installations in 2026 Very likely wrong “technically these heat pump tax credits based on the bill that was signed are available through 2033” only this source Replacing an old single-stage air conditioner with an inverter heat pump cuts cooling costs substantially Leans partly right “on average we see about a 30 or 40% savings it is very drastic” only this source Through 2025 a federal tax credit covered 30% of a geothermal heat pump's installed cost with no cap Leans right “the geothermal heat pump credit is actually 30% annually with no annual cap” 1 of 7 sources An air conditioner is a heat pump that only runs in one direction Leans right “remember a heat pump is just an air conditioner with a reversing valve so a heat pump is also your air conditioner” 1 of 8 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “the reason geothermal is so much more expensive is because you actually have to drill Loops” 1 of 11 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “for your traditional air source heat pumps it's a $2,000 annual cap” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “the other way that you can almost guarantee you save money is by putting in solar panels” 1 of 23 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “what you're actually comparing is the cost of natural gas which historically has been very low” 1 of 31 sources	0.92	mixed
+1	Heat Pump Buyer's Remorse? This Alternative Works Better Skill Builder Show claimsNovel (2)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) Air-to-air heat pumps cost far less to install than air-to-water systems Leans right “a Daikin air-to-air heat pump with three indoor units, which has taken care of all of our heating needs for 5,300 pounds.” only this source The UK Boiler Upgrade Scheme grant requires removing the existing gas boiler Leans right “They made me get rid of my gas boiler. I deeply regret it.” 1 of 2 sources A heat pump pays for itself through lower energy bills within a few years Leans wrong “Uh four years. Four years. So, four years you got your money back.” 1 of 4 sources A heat pump can be added alongside an existing furnace to cut fuel use Leans right “We still have our gas heating if if we want to turn that on.” 1 of 6 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “in order for it to break even with a gas boiler, we need to be trying to get four” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “the solar panels gave me all of the solar required to run these all the way through the day for free.” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “I have the Octopus Intelligent Go tariff I get a tariff overnight for 6 hours at 7.5.” 1 of 24 sources	0.91	mixed
+1	What are the Pros and Cons of Heat Pumps? Monkey Wrench Plumbing, Heating, Air & Electric Show claimsNovel (2)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) Ductless heat pumps allow room-by-room temperature control Leans right “each indoor air handler is controllable to ensure that your family can attain their ideal Comfort” only this source A heat pump removes the carbon monoxide risk of combustion heating Leans right “running a gas or oil-based furnace introduces several pitfalls for one there is the risk of carbon monoxide poisoning” 1 of 2 sources A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “heat pumps are on average five percent more expensive than traditional air conditioners” 1 of 3 sources Heat pumps need more maintenance or repairs than gas furnaces Leans wrong “heat pumps may require more maintenance than a standard air conditioner but this is because they have more moving Parts” 1 of 3 sources Electric resistance heat costs far more to run than a heat pump Probably right “about 50 percent less energy consumed when heating a home compared to Standard Electric heating systems” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “since a heat pump houses both Heating and Cooling elements” 1 of 25 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “anything below 40 degrees will cause the heat pump's efficiency to slip and it will need to consume more power” 1 of 34 sources	0.91	mixed
+1	$21k VS $7k Air Conditioner Heat Pump \| Scam Or Real \| HVAC Review HVAC Talkshow and Review For Homeowners & DIY Show claimsNovel (1)Right (3)Wrong (1)Partly (1)Untestable (0)All (5) Inverter heat pumps keep far more of their heating capacity in cold weather than single-stage units Leans right “this one goes from 3 tons down to a little over two tons, while this one goes from 3 tons to a measly one ton.” only this source A premium inverter heat pump's energy savings repay its higher price over a basic single-stage system Leans wrong “it's realistic that you could get your money back.” only this source Variable-speed heat pumps dehumidify better than single-stage systems Leans partly right “It wants to run, which means it will dehumidify better, filter the air better, and move the air around better.” only this source Inverter-driven heat pumps run more efficiently and quietly than single-stage units Leans right “This is the sound of it. Can't barely hear anything.” 1 of 4 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “this 3-tonon system essentially becomes a one- ton system at 5° F.” 1 of 34 sources	0.89	mixed
+1	I Installed a DIY Mini-Split—Here's What It Cost to Run I Like To Build Stuff Show claimsNovel (1)Right (4)Wrong (1)Partly (1)Untestable (0)All (6) Homes in places with temperature extremes need a secondary heat source alongside a mini-split Leans right “your home should have a secondary heating and cooling source, like electric baseboard heaters, a furnace, or even a portable air conditioner” only this source Installing a mini-split yourself saves thousands of dollars over a professional install Leans partly right “doing it DIY, you saved $4,967.” only this source A heat pump pays for itself through lower energy bills within a few years Leans wrong “$500 a year it take 4 years to pay back the unit.” 1 of 4 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “Equipment that is oversized won't run efficiently, and will likely cause a short cycling, poor humidity control, and a waste of energy.” 1 of 15 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “this is the only thing that we use to heat and cool our home.” 1 of 25 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “extreme hot and cold outside temperatures will affect the mini split's efficiency.” 1 of 34 sources	0.88	mixed
+1	Converting a Furnace To A Heat Pump! HVAC GUY Show claimsNovel (2)Right (3)Wrong (1)Partly (0)Untestable (0)All (4) Heat pumps in mild climates can run without backup heat strips Leans right “They don't need heat strips.” only this source A heat pump removes the carbon monoxide risk of combustion heating Leans right “They can replace a gas furnace down here and make the house safer.” 1 of 2 sources A heat pump makes the most financial sense when the air conditioner also needs replacing Leans right “it would have cost him $3,000 more than the system that I just installed” 1 of 4 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “that bill is going to be much smaller for them” 1 of 16 sources	0.88	mixed
+1	The Truth About HVAC Scams & Heat Pump Hype \| Handy Bros. CEO Sets the Record Straight Handy Bros. Home Comfort Show claimsNovel (0)Right (2)Wrong (0)Partly (3)Untestable (0)All (5) Most heat pumps are installed or sized improperly Leans partly right “the majority of heat pumps installed today are installed and sized improperly” only this source Heat pump incentives have drawn inexperienced installers into the market Leans partly right “there has been companies that pop up overnight and are out there installing heat pumps” only this source Heat pump reliability problems mostly come from poor installation Leans partly right “They get a bad name when really it all comes down to the contractor who installed it.” 1 of 2 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “don't think that they're suited for Canada when that's not at all the case.” 1 of 10 sources DENIES Heat pumps do not work in very cold climates Probably right “heat pumps do work and they do work very well in this climate” 1 of 17 sources	0.71	mixed
+1	Heat Pumps In Winter ££££!!! - The Running Costs! Electric Vehicle Man Show claimsNovel (0)Right (7)Wrong (1)Partly (2)Untestable (0)All (10) A heat pump can often reuse a home's existing radiators and pipework with few changes Leans partly right “We only had to replace a few radiators as the previous video will tell you” only this source A heat pump needs a heat loss calculation and system design to work well Leans right “If you get the heat calculations done for your house properly and it's installed properly” 1 of 4 sources DENIES Heat pumps need a home to be well insulated to work economically Leans right “So, we haven't uberinsulate the house. You don't need to.” 1 of 6 sources Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “they're very expensive and they don't suit a lot of people in terms of justifying themselves compared to getting a gas boiler out” 1 of 6 sources Removing the gas connection saves its fixed monthly charge Probably right “we can then get rid of gas entirely from the house, which means that's anotherundredish pounds a year standing charge” 1 of 9 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “Even on the price cap, you're saving just over £100.” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “I'm probably paying four,5,000 more for a heat pump than I would for an equivalent gas boiler swap out.” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “It does justify it for us, but only because of the bigger battery system, the solar panels.” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “once you've got that time of day tariff, then a heat pump will be considerably cheaper” 1 of 24 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “we have an efficiency of 3.8 or as I prefer to do it. Come on 380% efficiency.” 1 of 35 sources	0.70	mixed
+1	AC vs. Heat Pump: Which is Better for Your Home? \| Comprehensive Comparison Monkey Wrench Plumbing, Heating, Air & Electric Show claimsNovel (1)Right (4)Wrong (1)Partly (2)Untestable (0)All (7) If you are keeping a working furnace, a new air conditioner costs less upfront than a heat pump Leans right “if you're looking to replace your cooling system and keep your furnace, then a new air conditioner is ideal” only this source DENIES A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “air source heat pumps tend to cost thousands of dollars more than air conditioners” 1 of 3 sources Heat pumps need more maintenance or repairs than gas furnaces Leans wrong “heat pumps need an additional maintenance checkup before the start of the cold weather season” 1 of 3 sources A heat pump cools as efficiently as a comparable central air conditioner Leans right “Heat pumps and air conditioners have similar energy efficiency ratings.” 1 of 6 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “a heat pump installation can also cost more if your home doesn't have the proper electrical panel upgrades to support it” 1 of 7 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “these systems can be powered through solar panels to help offset some of the operating costs” 1 of 23 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “heat pumps can provide heating and cooling, whereas ACs only provide cooling” 1 of 25 sources	0.70	mixed
+1	Heat Pump at –3°C: The Truth No One Tells You UpsideDownFork Show claimsNovel (1)Right (4)Wrong (1)Partly (3)Untestable (0)All (8) Modern heat pumps run quietly Leans right “Aside from that, you don't know it's running.” 1 of 2 sources A home battery charged on cheap off-peak electricity cuts a heat pump's running cost Leans partly right “battery storage, which is going to make it considerably cheaper to run, is roughly going to half the price” 1 of 2 sources Heat pumps give more even heating and cooling than furnaces and air conditioners Leans partly right “the temperatures now throughout the house are pretty consistent” 1 of 2 sources The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “the government opening up access to the bus grant to those people considering airto-air heat pumps” 1 of 6 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “the gas boiler about three times more expensive. even when my heat pump is struggling to be efficient” 1 of 16 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “if you've got enough battery storage, you've got solar panels, you've got a heat pump, you're absolutely quid in” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Can you really just utilize a few smart tariffs and still be cheaper than gas? Well, yes, I believe so.” 1 of 24 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “only a coefficient of performance of 2.69. That is one of the very worst days” 1 of 34 sources	0.68	mixed
+1	This is Why Heat Pumps May NOT Be The Future Skill Builder Show claimsNovel (1)Right (3)Wrong (2)Partly (2)Untestable (0)All (7) The UK Boiler Upgrade Scheme grant requires removing the existing gas boiler Leans right “that's the only way you're going to get that grant is if you actually junk your gas boiler out.” 1 of 2 sources Many heat pump owners end up with high bills and a colder house Leans wrong “a lot of people are very disappointed after a couple of years of running and seeing their high electricity bills” only this source Heat pump outdoor units are noisy enough to cause neighbour complaints Leans partly right “I can hear the fan going. My neighbors complaining about it.” only this source Heat pumps need a home to be well insulated to work economically Leans wrong “They don't work well enough in our housing stock.” 1 of 3 sources Heat pumps on radiator systems often need larger radiators to run efficiently Leans right “They put in the pipe work, buffer tank, larger radiators, or the underlo heating” 1 of 4 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “running a heat pump is roughly three times more expensive than running a gas boiler.” 1 of 7 sources A heat pump costs more to buy and install than a gas furnace Leans right “But now you've got to spend, I would say, £16,000 doing the extra work to make the heat pump work.” 1 of 22 sources	0.66	mixed
+1	Are Heat Pumps Really Worth It In 2026? Artisan Electrics Show claimsNovel (0)Right (8)Wrong (1)Partly (2)Untestable (1)All (12) Heat pump installation prices will fall to match gas boilers as sales scale up Unknown “it's going to be, um, comparable to a gas boiler in no time at all and also more comfortable and save you money every year” only this source Radiator size and flow temperature decide whether a heat pump costs less to run than a gas boiler Leans partly right “That relationship between your radiator sizing and the demand of heat in your house is what dictates if this unit is going to pay back” 1 of 2 sources Running a heat pump steadily at low flow temperature costs less than heating in short bursts Leans right “we want to just run it slowly, gently. same as driving a car, you want to run it gently” 1 of 4 sources DENIES Heat pumps need a home to be well insulated to work economically Leans right “they will literally work in any building provided you have double glazing, that's it.” 1 of 6 sources The UK Boiler Upgrade Scheme grant pays £7,500 toward a heat pump installation Probably right “everyone is entitled to seven and a half thousand pounds to have one of these installed” 1 of 6 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “they're most popular in like scandinavia etc. they're designed to go down to minus 15, minus 20.” 1 of 10 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “ground source is really expensive. yeah you're talking tens and tens of thousands.” 1 of 11 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “we don't oversize it because that actually drives down efficiency if it's oversized too much and cost too much to buy” 1 of 15 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “because they save a lot of money” 1 of 16 sources A heat pump costs more to buy and install than a gas furnace Leans right “they're still generally more expensive” 1 of 22 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “free energy from the sun, heat your house. so they're amazing.” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “simply switch to many of the heat pump tariffs out there or any of the flexible tariffs, you'll be saving potentially hundreds” 1 of 24 sources	0.64	mixed
+1	HVAC Installation Costs: AC, Heat Pump, & Furnace This Old House Show claimsNovel (1)Right (5)Wrong (0)Partly (2)Untestable (0)All (7) Heat pumps in cold climates may need a backup heat source on the coldest days Probably right “if you live in a cold-climate region, a heat pump may require a backup furnace on the coldest winter days” 1 of 2 sources A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “Air conditioners cost $4,000–$8,000 installed, heat pumps cost $4,200–$7,600” 1 of 3 sources DENIES Heat pumps last about as long as furnaces and air conditioners Leans partly right “Air conditioners and heat pumps typically last 10–15 years, while furnaces often last 15–20 years or more” 1 of 3 sources Ducted heat pumps can often use a home's existing ductwork Leans right “a ducted heat-pump system can connect to that existing infrastructure “with little or no retrofitting needed,”” 1 of 7 sources Ground-source (geothermal) heat pumps run cheaper but cost much more to install than air-source Leans right “geothermal systems command a higher price but deliver lower operating costs” 1 of 11 sources Electric resistance heat costs far more to run than a heat pump Probably right “they use resistance heating and consume significantly more electricity than heat pumps” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “a modern, energy-efficient alternative that can provide both heating and cooling” 1 of 25 sources	0.59	mixed
+1	Hybrid heat pump and gas furnace HVAC system being recommended - GreenBuildingAdvisor GreenBuildingAdvisor Show claimsNovel (0)Right (5)Wrong (0)Partly (3)Untestable (0)All (8) DENIES A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “the operating cost delta is not worth the complication and cost of dealing with gas” only this source Installers often set the dual-fuel switchover temperature higher than needed, reducing heat pump savings Leans partly right “installers usually don’t know your heat loss and are overly conservative with the crossover point” only this source Existing ductwork can be too small for the airflow a heat pump needs Leans right “If the ducts were sized for a gas furnace originally you can have issues with a heat pump being able to deliver enough heat” 1 of 4 sources Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “Heat pumps spend most of the time in defrost near freezing temperature.” 1 of 8 sources Removing the gas connection saves its fixed monthly charge Probably right “my gas meter fee is $25/month so $300/year” 1 of 9 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “with a heat pump you can always add a PV array to offset some of the operating costs” 1 of 23 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “The reality is that modern hyper heat units are no problem even in colder climate.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “On older heat pumps, the output starts falling off the cliff around that temperature.” 1 of 34 sources	0.58	mixed
+1	6 Years of Savings from Mini-Split Heat Pump in Cold Climate Matt Rosendaul Show claimsNovel (1)Right (6)Wrong (1)Partly (0)Untestable (0)All (7) Ductless mini-splits may not distribute heat evenly through a whole house Leans right “the bedrooms don't get quite the same temperature conditioning as the living room does” 1 of 2 sources A heat pump pays for itself through lower energy bills within a few years Leans wrong “that saved us five thousand seven hundred and forty eight dollars which is great considering we only paid forty one hundred dollars” 1 of 4 sources A heat pump needs a heat loss calculation and system design to work well Leans right “you really need to have a qualified HVAC contractor do those calculations for you” 1 of 4 sources A heat pump can be added alongside an existing furnace to cut fuel use Leans right “we do still have an operational boiler in the house that operates when it gets really really cold” 1 of 6 sources A heat pump costs less to run than heating with oil, propane or electric resistance Probably right “it costs a lot of money to run the boiler though because it's on propane” 1 of 15 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “the mini-split only costs an average of fifty seven dollars per month” 1 of 16 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “in practicality it actually works down to about 9 degrees colder than that and it'll shut itself down” 1 of 34 sources	0.57	mixed
+1	Mini-Split 2 Year Review \| COLD CLIMATE Jacob Shields Show claimsNovel (1)Right (3)Wrong (1)Partly (1)Untestable (0)All (5) A low-cost ductless mini-split can heat a space in single-digit outdoor temperatures Leans right “we got 90° roughly of air coming out of the mini split and it is it is right now 9° outside” only this source Heat pumps do not work in very cold climates Probably wrong “your whole Winter's this temperature I don't think it would work for you” 1 of 3 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “it is really airtight with the spray foam up top there's no air getting in” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “I have the benefit of uh AC in the summer” 1 of 25 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “if it's too cold outside it just it just can't do that” 1 of 34 sources	0.56	mixed
+1	How a Ductless Heat Pump Can Save You Money and Energy \| Mitsubishi Electric HVAC US mitsubishicomfort.com Show claimsNovel (0)Right (2)Wrong (0)Partly (3)Untestable (0)All (5) Ductless heat pumps cut energy costs compared with ducted forced-air systems Leans partly right “Ductless heating and air conditioning systems can save 30-40 percent off the energy costs of a forced air system.” only this source Zoned ductless heat pumps save energy by heating only the rooms in use Leans partly right “You can save a lot of money and energy by sending less heat into lesser-used areas of your home.” only this source A heat pump cools as efficiently as a comparable central air conditioner Leans right “A heat pump is an energy-saving air conditioner that simply reverses the flow of refrigerant.” 1 of 6 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “You need to make sure you have adequate insulation, and that all window, door and attic air leaks are sealed.” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “switching to a ductless heat pump system can kill two birds with one stone, bringing both cooling and heating in one system.” 1 of 25 sources	0.52	mixed
+1	Need air conditioning? Consider the heat pump. Canary Media Show claimsNovel (1)Right (6)Wrong (2)Partly (1)Untestable (0)All (9) A heat pump costs about the same as or less than a new furnace plus central air conditioner Leans right “installing a heat pump in a single-family home in the region typically costs $1,000 less than installing a gas furnace and AC” 1 of 3 sources Most US homes would save money over the equipment's life by switching to a heat pump Leans wrong “For most households, these two-in-one appliances pay for themselves in reduced energy bills over their estimated 16-year lifetime.” 1 of 3 sources Federal heat pump rebates for low- and moderate-income households depend on slow state-by-state rollout Probably right “While some state programs have rolled out after being finalized under the Biden administration, others still awaiting approvals are now stuck in limbo.” 1 of 6 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “it costs between $900 and $1,900 more to replace a broken central AC with a heat pump instead of a conventional AC” 1 of 9 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “Families that go from relying on expensive delivered fuels to electric heat pumps unlock the biggest cost savings” 1 of 16 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “Households ditching gas heating can see an average of $60 in savings per year.” 1 of 16 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “the Energy Efficient Home Improvement Credit, which can take up to $2,000 off your federal tax bill for a qualifying heat pump” 1 of 22 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Utility customers with access to electricity rates that favor heat pumps can save even more.” 1 of 24 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “All-electric heat pumps are ACs, but better.” 1 of 25 sources	0.44	mixed
+1	Heat pump myths 🤯😱 DO NOT believe them!! The Thought Provocateur Show claimsNovel (0)Right (5)Wrong (1)Partly (3)Untestable (0)All (9) DENIES A heat pump costs more to buy and install than a gas furnace Leans wrong “So often times it comes down to a wash depending on what is in your home currently.” only this source Inverter heat pumps run quieter than furnaces and older air conditioners Leans partly right “high-efficiency heat pumps, are drastically quieter than most furnaces” only this source DENIES A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “it's true that a heat pump is more expensive than a standard air conditioner” 1 of 3 sources An air conditioner is a heat pump that only runs in one direction Leans right “all a heat pump is is an air conditioner with a reversing valve” 1 of 8 sources DENIES Heat pumps do not work in very cold climates Probably right “heat pumps do not work well in cold weather. Now, this could not be further from the truth.” 1 of 17 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “some of our heat pump customers actually enjoyed a zero-dollar heating bill” 1 of 23 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “heat pumps only heat and that's actually not true at all” 1 of 25 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “And so far, the coldest night I've experienced is -8° Fahrenheit.” 1 of 31 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “natural gas prices and electricity prices vary widely across the country” 1 of 31 sources	0.42	mixed
+1	Furnaces: Why we still burn fuel to heat our homes Technology Connections Show claimsNovel (1)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) Natural gas costs much less than electricity per unit of energy delivered to the home Very likely right “And that means that gas heat is a lot cheaper than electric heat” 1 of 3 sources Heat pumps do not work in very cold climates Probably wrong “Right now they don't work so well in climates like mine because when the temperature outside drops below freezing” 1 of 3 sources An air conditioner is a heat pump that only runs in one direction Leans right “A heat pump is essentially a modified air conditioner that is able to operate in reverse.” 1 of 8 sources Choosing a heat pump instead of a new central air conditioner adds efficient heating for little extra cost Leans partly right “If you’re installing an air conditioner, you might as well spend the extra dollars and make it a heat pump.” 1 of 9 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “a heat pump can move more heat energy into a living space than the natural gas itself contains” 1 of 19 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “But along with getting less efficient, their actual heat output also drops.” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “air conditioners actually move three to four times as much energy than they consume.” 1 of 35 sources	0.41	mixed
+1	How Heat Pumps Reduce Energy Bills and Air Pollution in the San Francisco Bay Area RMI Show claimsNovel (0)Right (2)Wrong (1)Partly (1)Untestable (0)All (4) Adding heat pump load in winter can lower electricity rates by using spare grid capacity Leans partly right “heating homes with heat pumps can put downward pressure on electricity rates” only this source Heat pump water heaters use far less energy than conventional water heaters Leans right “they are typically more than three times more efficient than gas water heaters” 1 of 4 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “When a home replaces both its gas water heater and its gas furnace with heat pumps, nearly 90% of homes still see lower bills” 1 of 16 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “When this efficiency is paired with beneficial electric rates, the savings grow.” 1 of 24 sources	0.40	mixed
+1	How efficient are our minisplit heat pumps in the winter Matthias random stuff Show claimsNovel (1)Right (5)Wrong (1)Partly (0)Untestable (0)All (6) Ductless mini-splits may not distribute heat evenly through a whole house Leans right “the mini splits don't put the heat exactly where we want it when we want it.” 1 of 2 sources DENIES Heat pump efficiency and capacity fall as the outdoor temperature drops Probably wrong “there doesn't seem to be any correlation of coefficient of performance and outside temperature” only this source Defrost cycles reduce a heat pump's output and efficiency in cold, humid weather Probably right “whenever it defrosts, that basically means heating up the outside coils using electricity, and that is electricity that isn't used to heat up the house” 1 of 8 sources Electric resistance heat costs far more to run than a heat pump Probably right “I think those mini splits heat with about half as much electricity as conventional electric heaters would.” 1 of 18 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “they're also an air conditioning system, and an air conditioning system that pays for itself” 1 of 25 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “with electricity being relatively cheap here and natural gas expensive, that makes it the most cost-effective heating option here” 1 of 31 sources	0.40	mixed
+1	Heat Pumps vs Gas Boiler Running Costs... The TRUTH Elite Renewables Show claimsNovel (0)Right (5)Wrong (3)Partly (2)Untestable (0)All (10) Home batteries charged off-peak pay back within a few years by cutting heat pump running costs Leans wrong “payback sometimes being as little as 2 to 4 years.” only this source Smart control apps that run a heat pump in cheap tariff hours cut its running costs substantially Leans partly right “some of these apps claim to save you between 20 and 40% on your heat pump running costs.” only this source Switching to a heat pump cuts heating bills by half or more Leans wrong “It's roughly halved.” only this source Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “The difference is how it's designed and how it's set up.” 1 of 15 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “a well-designed heat pump that's using one or more of these other levers should cost less to run than a boiler.” 1 of 16 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “you're paying 50% more per unit of heat with a heat pump under these conditions.” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “with a heat pump, you can generate your own electricity via solar.” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “just by being on the right tariff, the economics flip entirely.” 1 of 24 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “the uncomfortable truth is that actually both can be right.” 1 of 31 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “It's taking heat from the outside and moving it in.” 1 of 35 sources	0.37	mixed
+1	What it ACTUALLY costs to run a Heat Pump (vs Gas Boiler) Octopus Energy Show claimsNovel (0)Right (5)Wrong (1)Partly (2)Untestable (0)All (8) A home battery charged on cheap off-peak electricity cuts a heat pump's running cost Leans partly right “those who had other Green Tech like a battery for example made Savings of up to 27 %” 1 of 2 sources Heat pumps last about as long as furnaces and air conditioners Leans partly right “a heat pump can last around 20 years” 1 of 4 sources Removing the gas connection saves its fixed monthly charge Probably right “you'll no longer have to pay a standing charge which can save you 115 lbs of year” 1 of 9 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “just like boilers your heat pump will need to be serviced annually” 1 of 9 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “it's now cheaper to run a heat pump in your home than it is a gas boiler” 1 of 16 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “running a heat pump on this standard tariff would cost an extra £78” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “shifted your electricity usage out of peak times you could save 220 compared to gas” 1 of 24 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “for every one unit of energy that you put into the system you'll achieve four units of heat” 1 of 35 sources	0.36	mixed
+1	Natural Gas Homes are Lowest-Cost and Lowest-Emissions, Even Compared to Homes with Electric Cold-Climate Heat Pumps - American Gas Association American Gas Association Show claimsNovel (1)Right (3)Wrong (1)Partly (1)Untestable (0)All (5) Natural gas costs much less than electricity per unit of energy delivered to the home Very likely right “natural gas costs are 3.4 times more affordable than electricity and other residential fuels.” 1 of 3 sources DENIES Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably wrong “natural gas homes on average can reach 11 percent lower emissions this year than with the use of many advanced air-source heat pumps” 1 of 3 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “The energy cost of the all-electric home using a cold-climate heat pump is $1,458, or 37% higher than the natural gas home.” 1 of 10 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “often relying on less efficient backup sources of heating to make up the difference.” 1 of 10 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “Ducted heat pumps do work in cold climates, but below-freezing winter temperatures can lead to lower performance” 1 of 34 sources	0.35	mixed
+1	Massachusetts homeowners say state is ignoring cost in push toward all electric heat WCVB Channel 5 Boston Show claimsNovel (1)Right (3)Wrong (1)Partly (1)Untestable (0)All (5) A heat pump shifts heating cost onto the electricity bill, which can rise sharply in winter Probably right “THEY HARDLY USED TO PAY AN ELECTRIC BILL, OWING NATIONAL GRID LESS THAN $800 TOTAL FOR ALL OF LAST WINTER.” 1 of 3 sources DENIES A heat pump costs less to run than heating with oil, propane or electric resistance Probably wrong “HEATS HIS HOUSE MORE EVENLY THAN HIS OLD OIL SYSTEM, BUT SAYS THE COST OF THAT HEAT DOUBLED THIS WINTER.” 1 of 3 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “THEY SAY IT'S CERTAINLY EFFICIENT AT BURNING THROUGH THEIR MONEY.” 1 of 7 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “THE STATE NEEDS TO BRING DOWN ELECTRICITY COSTS TO DRIVE WIDER ADOPTION OF ELECTRIC HEAT.” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “DPU IS ORDERING UTILITIES TO PROVIDE REDUCED ELECTRIC RATES IN WINTER FOR CUSTOMERS WITH HEAT PUMPS.” 1 of 24 sources	0.30	mixed
+1	Heat Pump in -30 C. Canadian Winter Struggles The Clean Energy Show Show claimsNovel (1)Right (4)Wrong (1)Partly (1)Untestable (0)All (6) Snow and ice buildup on the outdoor unit can stop a heat pump from heating Leans right “the fan stopped spinning because there was just a little bit too much ice in there” 1 of 3 sources DENIES A heat pump still uses less energy than resistance heat even in very cold weather Probably wrong “when it's down at minus 30 you're essentially it's the same efficiency as a sort of an old-fashioned electric heater” only this source Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “there's a backup resistive heater which is essentially a 10,000 watt heater simple mechanism not efficient” 1 of 10 sources Heat pumps are being used successfully in cold countries like Norway and Canada Leans right “this is the second winter that I've had it and it's basically worked” 1 of 10 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “there's some now that work down to minus 30” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “as they get to that minus 30 they're essentially working they lose their efficiency” 1 of 34 sources	0.29	mixed
+1	Will a heat pump save you money? It depends Canary Media Show claimsNovel (0)Right (6)Wrong (3)Partly (2)Untestable (0)All (11) DENIES A heat pump costs about the same as or less than a new furnace plus central air conditioner Leans wrong “that combo would cost on average $11,000, which is still much less than the average sticker price of upgrading to a medium-efficiency heat pump” only this source Most US homes would save money over the equipment's life by switching to a heat pump Leans wrong “heat pumps make economic sense for an estimated 65 million out of 110 million households in the U.S.” 1 of 3 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “Massachusetts issues rebates as massive as $16,000 for income-qualified households.” 1 of 9 sources Removing the gas connection saves its fixed monthly charge Probably right “a sure way consumers can save on their bills is if they can rid themselves of their gas connection entirely” 1 of 9 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right ““If you’re converting from fuel oil, propane or electric resistance, those tend to be pretty expensive heating fuels, so you could save quite a bit” 1 of 16 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “for more than half of homes that use natural gas for heating, there was a financial benefit from switching to a heat pump” 1 of 16 sources Air sealing and insulation should come before or alongside a heat pump Leans partly right “It can even lower the upfront costs of a heat-pump system by up to $3,700, because a better-insulated home requires less heating power.” 1 of 18 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “Heat pumps are undisputed winners for the climate.” 1 of 19 sources A heat pump costs more to buy and install than a gas furnace Leans right “a like-for-like furnace or boiler replacement (i.e. swapping a broken gas system for a new gas one) costs on average just $5,000” 1 of 22 sources From 2023 through 2025 a federal tax credit covered 30% of a qualifying heat pump, up to $2,000 Very likely right “The 2022 Inflation Reduction Act includes a $2,000 federal tax credit for heat pumps” 1 of 22 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “some utility customers in Maine can already get lower electric rates for using heat pumps” 1 of 24 sources	0.28	mixed
+1	Why is my electric Bill so High!!! Mitsubishi Mini Split Hyper Heat Review Part 4. Feb 2020 Bill J-Mart Show claimsNovel (1)Right (3)Wrong (1)Partly (0)Untestable (0)All (4) A heat pump shifts heating cost onto the electricity bill, which can rise sharply in winter Probably right “it was a four hundred and some odd dollars in January” 1 of 3 sources DENIES Ductless mini-splits may not distribute heat evenly through a whole house Leans wrong “it's throughout the entire house it's all the same nice comfortable temperature” only this source DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “I have not had to clean them since we purchased these in November” 1 of 9 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “this is the time of the year where these are at their most efficient” 1 of 34 sources	0.24	mixed
+1	I Spent 90 Days with a Octopus Heat Pump and was SHOCKED by the Costs! Jonathan Tracey Show claimsNovel (0)Right (5)Wrong (1)Partly (1)Untestable (0)All (7) DENIES Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably wrong “Cozy octopus would have actually have cost more.” 1 of 2 sources Running a heat pump steadily at low flow temperature costs less than heating in short bursts Leans right “depending on what that sensor is sensing, this will adjust the flow temperature of the heat pump.” 1 of 4 sources DENIES Heat pumps need more maintenance or repairs than gas furnaces Leans right “The servicing costs on a heat pump are significantly less.” 1 of 9 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “if you don't have solar and ore batteries, a heat pump might actually cost you a little bit more to run” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “If you've got solar and batteries, a boiler is going to be 160 percent more expensive to run than running a heap hump.” 1 of 23 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “the efficiency of your heat pump depends on the external temperature.” 1 of 34 sources A heat pump moves heat rather than making it, so it delivers more heat energy than the electricity it uses Probably right “That gives us a seasonal coefficient of 3.54, which is pretty good for the cold part of the winter.” 1 of 35 sources	0.23	mixed
+1	Heat pumps are efficient and better for the climate. But with sky-high electric rates, will Mass. consumers buy in? - The Boston Globe BostonGlobe.com Show claimsNovel (0)Right (5)Wrong (1)Partly (3)Untestable (0)All (9) DENIES A heat pump costs less to run than heating with oil, propane or electric resistance Probably wrong “even homeowners switching from that source could see their energy costs increase by a few hundred dollars over the cold season” 1 of 3 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “homeowners switching from natural gas boilers to heat pumps could see an increase in operating costs” 1 of 7 sources State and utility rebates can cover a large share of a heat pump's cost Leans partly right “After a standard Mass Save rebate and federal tax credit, the net average price dropped to $10,000.” 1 of 9 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “in cases where the units are poorly matched to the size of the house or apartment or the demands of a New England winter” 1 of 15 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “Heat pumps are powered by electricity, and in Massachusetts, electric rates are among the highest in the nation.” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “If a home has solar panels or highly efficient heat pumps rated for the coldest climate, bills generally stay lower” 1 of 23 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Unitil’s rate, which is available this year and will be offered annually from November through April, decreases the electric delivery charge by nearly two-thirds.” 1 of 24 sources A heat pump replaces both the furnace and the air conditioner with one system Probably right “They especially love that the heat pumps double as air conditioning in the summer.” 1 of 25 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “because heat pumps are less efficient at low temperatures” 1 of 34 sources	0.21	mixed
+1	Heat Pump vs Gas Furnace - Which is the Best Choice For You? HVACDirect Show claimsNovel (0)Right (4)Wrong (1)Partly (1)Untestable (0)All (6) Most US homes would save money over the equipment's life by switching to a heat pump Leans wrong “with modern technology inverter Drive heat pumps it pretty much always makes sense to install one” 1 of 3 sources Payback for a heat pump varies widely with climate, fuel prices and the equipment it replaces Probably right “it would take a really long time to even equal out on those cost savings because of how cheap natural gas is” 1 of 6 sources A dual-fuel system (heat pump with a gas furnace backup) is cheaper to run than either alone in cold climates Leans partly right “save money in the long run as that heat pump runs in the warmer weather and you switch over to your furnace” 1 of 12 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “if you're using oil or propane it's a no-brainer” 1 of 16 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “many heat pumps can Now operate down to negative 22 degrees” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “of course it will perform better if it's 50 degrees outside compared to zero degrees outside” 1 of 34 sources	0.21	mixed
+1	Natural Gas or a Heat Pump? Where You Live Matters - American Gas Association American Gas Association Show claimsNovel (0)Right (5)Wrong (1)Partly (0)Untestable (0)All (6) DENIES Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably wrong “a natural gas ENERGY STAR household can have a carbon footprint 19% lower than an ENERGY STAR heat pump household” 1 of 3 sources Installing a heat pump can require costly electrical panel or service upgrades Leans right “you may also need to pay to have it rewired for additional electrical capacity” 1 of 7 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “natural gas is more affordable in 41 out of 50 states when comparing ENERGY STAR natural gas furnaces to ENERGY STAR electric heat pumps.” 1 of 10 sources A heat pump costs more to buy and install than a gas furnace Leans right “New heat pumps typically cost between $2,500 and $10,000 to install” 1 of 22 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “where you live says a lot about what type of heating is going to be most affordable in the long term.” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “The colder (or hotter) it is, the harder it has to work to make that happen, and the more electricity it takes.” 1 of 34 sources	0.20	mixed
+1	Heat Pump Reality Check - Gas Boiler Wins on Running Costs Jonathan Tracey Show claimsNovel (0)Right (4)Wrong (1)Partly (2)Untestable (0)All (7) DENIES Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably wrong “it will cost you more to have a heat pump and be on cozy octopus than it would do to keep your gas boiler” 1 of 2 sources Switching from gas to a heat pump raises the household's energy bills Leans partly right “In the coldest month of the year, the heat pump cost about £42 more to run for one month than it does on gas.” 1 of 7 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “when you're told that having a heat pump will save you money, the reality is for most people, that is not true” 1 of 10 sources Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably right “They're better for the environment.” 1 of 19 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “For heat pumps to beat gas on cost without the added costs of solar and batteries, electricity pricing needs to change.” 1 of 21 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “So in my circumstances, with solar and batteries, a heat pump is a no-brainer.” 1 of 23 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “But today, gas is cheap again. It was expensive. Now it's cheap, and that has changed the numbers.” 1 of 31 sources	0.19	mixed
+1	Why Heat Pumps are now leaving people COLD Silver Cymbal Show claimsNovel (0)Right (4)Wrong (2)Partly (1)Untestable (0)All (7) Backup resistance heat strips use less electricity than letting the heat pump run longer to catch up Leans wrong “it is much less electricity than just simply running your heat pump endlessly trying to make up a temperature” only this source Heat pumps need a home to be well insulated to work economically Leans wrong “if you've got a house that's 15 years or older you are definitely going to experience problems” 1 of 3 sources A heat pump cools as efficiently as a comparable central air conditioner Leans right “they are awesome air conditioners” 1 of 6 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “when the temperature goes below about 30° the efficiency drops way down that means your electric bill is going to begin to Skyrocket” 1 of 10 sources DENIES Heat pumps do not work in very cold climates Probably right “heat pumps cannot work in cold climates now that is absolutely false” 1 of 17 sources Modern cold-climate heat pumps keep heating well below 0°F Leans right “many of them now include a function called hyper heat that can allow a heat pump to effectively operate down to -20°” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “they can still generate heat but they become much less efficient now efficiency just means that your electric bill is going to get higher” 1 of 34 sources	0.18	mixed
+1	Heat Pump Hustle: Taxpayers On The Hook For Tech That Falls Flat In The Cold Across New Hampshire, NH Patch Show claimsNovel (0)Right (4)Wrong (1)Partly (1)Untestable (0)All (6) Heat pumps do not work in very cold climates Probably wrong “Taxpayers On The Hook For Tech That Falls Flat In The Cold” 1 of 3 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “natural gas heating remained more affordable than heat pumps in 41 states, including New Hampshire and the rest of New England.” 1 of 10 sources Cold-climate heat pumps often rely on backup resistance heat in the coldest weather, which raises bills Leans partly right “most households that adopt heat pumps in colder regions still rely on a backup heating source” 1 of 10 sources Heat pumps save the most money in homes now heated with oil, propane or electric resistance Probably right “The group estimates families abandoning fuel oil or propane could save closer to $1,000 annually.” 1 of 16 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “New Hampshire residents pay among the highest electricity prices in the country.” 1 of 21 sources A heat pump costs more to buy and install than a gas furnace Leans right “even supporters acknowledge that heat pumps are pricey to install, with costs typically ranging from $8,000 to $15,000.” 1 of 22 sources	0.17	mixed
+1	The advance of heat pumps bumps up against cost concerns - The Boston Globe BostonGlobe.com Show claimsNovel (0)Right (2)Wrong (1)Partly (0)Untestable (0)All (3) DENIES Heat pumps cut a home's carbon emissions compared with gas heating, even on today's grid Probably wrong “the majority of electricity in Massachusetts is sourced from gas- and coal-fired power plants. Until we clean up the source of our electricity” 1 of 3 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “there is no getting around the high cost of Eversource’s electricity delivery charges” 1 of 21 sources Time-of-use or heat-pump electricity tariffs make heat pumps cheaper to run Probably right “Let’s hope the state quickly enacts heat pump-friendly rates, in a permanent manner.” 1 of 24 sources	0.06	mixed
0	Heat Pumps Aren't for Everyone in Toronto & the GTA to Etobicoke—Find Out Why! The HVAC Veteran Show claimsNovel (1)Right (2)Wrong (1)Partly (2)Untestable (0)All (5) Heat pump defrost cycles release meltwater that can ice driveways and walkways Leans right “there is going to be water that's going to be around the system” only this source Switching to a heat pump substantially lowers monthly energy bills Leans wrong “And they're going to really make a big difference on how much you're paying month over month.” only this source HVAC equipment prices keep rising, so waiting to buy a heat pump costs more Leans partly right “they've been consistently going up in price every year, year after year after year.” only this source DENIES A heat pump costs about the same as a central air conditioner of the same capacity Leans partly right “on some units they can be as high as 3, 4,000 dollars more than an air conditioner.” 1 of 3 sources An air conditioner is a heat pump that only runs in one direction Leans right “Cuz they they do exactly what an air conditioner does.” 1 of 8 sources	0.81	mixed
0	Old Furnace: Repair or Replace? The Money Pit Show claimsNovel (1)Right (1)Wrong (1)Partly (0)Untestable (0)All (2) Heat pumps deliver cooler supply air than a gas furnace, which some people find less comfortable Leans right “Oil powered furnace air comes out at 140 degrees. With a heat pump, that temperature drops to about 110 degrees.” 1 of 3 sources Replacing an old oil furnace with a new oil furnace is a better choice than a heat pump Leans wrong “We suggest replacing the old oil fired furnace with new oil fired furnace, which will be much more efficient. Skip the heat pump.” only this source	0.17	mixed
0	Out of Gas: New York’s Blocked Pipelines Will Hurt Northeast Consumers Manhattan Institute Show claimsNovel (0)Right (2)Wrong (2)Partly (0)Untestable (0)All (4) Heat pumps are inefficient where winter temperatures regularly fall near or below freezing Leans wrong “But heat pumps are not efficient in regions where temperatures fall near or below freezing on a regular basis.” only this source DENIES Burning gas in a power plant to run a heat pump delivers more heat than burning it in a home furnace Leans wrong “preventing the direct use of gas in homes and businesses—which would be more efficient than burning it in power plants” only this source Replacing a working gas furnace with a heat pump rarely pays back on energy savings alone Leans right “replacing natural gas-fueled equipment with heat pumps has “negative internal rates of return (indicating that customers do not experience any payback” 1 of 6 sources DENIES Heating with a heat pump costs less than heating with a natural gas furnace Leans right “for residential users, heat pumps are more expensive than natural gas-fired heating units in almost all cases” 1 of 10 sources	0.14	mixed
0	Heat pumps are not delivering expected cost savings - GreenBuildingAdvisor GreenBuildingAdvisor Show claimsNovel (0)Right (4)Wrong (2)Partly (1)Untestable (0)All (7) DENIES A heat pump can be added alongside an existing furnace to cut fuel use Leans wrong “The first year our utility costs (oil and electric) were about $200 less than pre installation. Last year they were actually about the same” only this source DENIES A heat pump costs less to run than heating with oil, propane or electric resistance Probably wrong “electricity relatively expensive (.30/kw), I’ve opted to turn the heat pumps off and go back to oil.” 1 of 3 sources DENIES Heat pumps last about as long as furnaces and air conditioners Leans partly right “it wouldn't surprise me if a typical old-school boiler will outlast a typical modern heat pump.” 1 of 3 sources Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “If the refrigerant charge is not right, that can severely impact the operational efficiency of the heat pump” 1 of 15 sources High electricity prices relative to gas make heat pumps more expensive to run than gas boilers or furnaces Probably right “heat pumps don't always pay for themselves in Norther climates in areas served by natural gas, because natural gas tends to be pretty cheap” 1 of 21 sources Whether a heat pump is cheaper to run than gas depends mainly on local electricity and gas prices Leans right “that "being cheaper" part is entirely dependent on your relative costs for different input energy types” 1 of 31 sources Heat pump efficiency and capacity fall as the outdoor temperature drops Probably right “it will take more input energy for a heat pump to heat your home if it's extremely cold outside” 1 of 34 sources	0.10	mixed
0	Real Heat Pump Running Costs: A Full Year of Data From 5 Real Homes Lloyd's Gas & Renewables Show claimsNovel (0)Right (1)Wrong (2)Partly (1)Untestable (0)All (4) Well-installed air-source heat pumps reach seasonal efficiencies around four in real homes Leans wrong “this heat pump ran at a SCOP of 4.5 over the year.” only this source Oversized or poorly installed heat pumps cost more to run and deliver less comfort Leans right “It's because the installers who have put them in are bad.” 1 of 15 sources Heating with a heat pump costs less than heating with a natural gas furnace Leans wrong “in most cases that they're going to be cheaper than than a gas boiler to to run” 1 of 16 sources Pairing a heat pump with rooftop solar makes it much cheaper to run Leans partly right “I know it was a lot less for this customer as well cuz they have solar and batteries” 1 of 23 sources	0.04	mixed

Heat pumps: do they actually save money over a gas furnace and an air conditioner?

Recap

Is it cheaper to run than gas?

Does the upfront cost eat the savings?

What happens when it gets cold?

Replace a working furnace, or wait?

What incentives are left?

When does it pay for itself?

Five most worth your time

Judged wrong

Contested

All claims

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What the studies changed

Verdict changed by a study (14)