We get it. You’ve heard a lot of things about heat pumps. Some of them are true, some used to be true, and a lot of them are straight-up wrong. Let’s dig into the top ones.
Myth 1: “Heat pumps don’t work in cold weather.”
Used to be true. Hasn’t been for about a decade.
Modern cold-climate heat pumps maintain real, usable heating capacity well below freezing. The Northeast Energy Efficiency Partnerships (NEEP) ccASHP Specification requires certified cold-climate units to deliver a Coefficient of Performance of at least 1.75 at 5°F at maximum capacity. That means even on a five-degree day, the heat pump is still moving 1.75 units of heat for every unit of electricity it consumes. Plenty of certified models from Mitsubishi, Daikin, Bosch, Carrier, and Trane go further, operating down to -15°F and below.
The Department of Energy ran a Cold Climate Heat Pump Technology Challenge where ten major manufacturers built and field-tested prototypes in Alaska, Maine, Vermont, and across the upper Midwest. Field validation reports are publicly available from PNNL. Spoiler: they work.
If you still need real-world proof: Maine has over 60,000 homes with heat pumps as of 2024 and a state goal to add 175,000 more by 2027. Cold-climate heat pump installations across Maine, Vermont, New Hampshire, and Minnesota grew over 300% between 2020 and 2023. Efficiency Maine reports that modern cold-climate units provide efficient heating down to -22°F. Maine winters are not a joke. The heat pumps work.
Myth 2: “They’re really expensive to buy.”
Well, they’re not cheap. Like, what were you expecting? This is the most important, energy-intensive device for heating and cooling a space.
But they’re not crazy either, and with the current incentive programs they can be heavily subsidised. A typical installed cost runs $8,000 to $18,000 for a central ducted system, $3,000 to $7,000 for a single-zone mini-split. Income-qualified households can stack federal HEAR rebates with state programs and bring out-of-pocket cost close to zero. Check out our incentives table for your state.
Myth 3: “They’re really expensive to operate.”
This one is actually the most important to address honestly, because it CAN be true. A poorly installed heat pump, or one that’s leaking refrigerant, will be a huge energy hog.
A few things matter here:
Heating and cooling is energy-dominant, not capex-dominant. Over a 15-year life, you’ll spend more on the electricity to run the system than on the system itself. See the cost explorer for the math.
The single biggest problem we see in the field is that systems are undercharged or leaking refrigerant. Around half of refrigerant-based HVAC systems are undercharged or losing refrigerant slowly over time. MeasureQuick, the industry-standard commissioning platform, has documented that 70% of heat pumps are not commissioned to ACCA standards, which directly correlates with operating costs running 20-40% higher than they should.
That’s not a heat pump problem. That’s an install-quality problem.
How to get ahead of it:
- Insist your installer uses real commissioning tools. Ask whether they use MeasureQuick or an equivalent Bluetooth-probe-based commissioning platform. Insist on receiving the commissioning report, not just a paper invoice. If they can’t produce one, that’s a tell.
- Monitor it after install. Continuous monitoring tools (Sense, Emporia Vue for residential whole-home view) give you a check-engine light long before something fails. Most homeowners discover their refrigerant has slowly leaked out only when the system stops cooling on the hottest day of the year. By then, you’ve spent two summers running a compressor that was working twice as hard for the same comfort.
- Annual maintenance, actually scheduled. Once a year, a tech should check refrigerant charge, clean the outdoor coil, replace filters, and verify the static pressure. Skipping this for three years is how a $12,000 system becomes a $4,000 service call.
- Deep-clean the indoor heads every two to three years. Mini-split indoor units accumulate dust and mould inside the blower wheel and on the coil. Field teardowns find build-up that cuts capacity by 10-30%. Specialist services like We Clean Heat Pumps run $200-$400 per head. Filter changes alone don’t fix it. See Pull the Right Levers for the full breakdown.
Done right, a heat pump will give you 15+ years of low-cost operation. Done wrong, you’ll be replacing it in seven. The difference is mostly install quality and basic maintenance, not the equipment itself.
Myth 4: “They’re too complicated.”
Modern inverter-driven heat pumps have fewer moving parts than the dual-system (gas furnace + central AC) they replace. The variable-speed compressor handles both heating and cooling. The reversing valve switches modes. That’s it.
What is more complex is the installation: proper Manual J sizing, refrigerant line brazing, vacuum pulling, commissioning. The complexity moved upstream from the homeowner to the installer. Day-to-day operation is set-and-forget.
Myth 5: “I need backup heat.”
Mostly false for U.S. climate zones 1 through 5.
A properly sized cold-climate heat pump alone is sufficient for most of the country. NEEP’s ccASHP-certified products maintain useful capacity down to design temperatures in those zones. Even in climate zone 6 (much of New England, the upper Midwest, Pacific Northwest mountains), modern cold-climate units handle the load with no electric resistance backup needed.
That said, if you’re nervous, or if your zone genuinely makes it sensible, leaving an old boiler or electric resistance heaters in place as a backup is a perfectly reasonable hedge. Think of it like a plug-in hybrid car. Those few times you really need the gas, it’s there. You’re not driving on it most of the year, but having the option doesn’t cost you much.
Where dual-fuel (heat pump + existing gas furnace as backup) actually makes sense:
- Climate zone 7 and parts of zone 6 with sustained sub-zero stretches
- Areas with very cheap natural gas and very expensive electricity, where the dollar-per-BTU crossover happens at higher outdoor temperatures
- Existing homes with a working gas furnace where you’d be removing functional equipment for no real benefit
Otherwise: just the heat pump. Companies like Elephant Energy stake a 10-year comfort guarantee on this, promising your home will maintain 68°F between -5°F and 95°F outdoor or they’ll fix it. They wouldn’t make that promise if cold-climate heat pumps actually needed backup.
Myth 6: “Power outages?”
Your gas furnace also doesn’t run without the blower motor. Same problem, same solutions.
A whole-home generator or battery backup (Tesla Powerwall, Enphase, Generac, Franklin Home Power) powers your heat pump the same way it powers any other electrical load. If anything, the heat pump is easier than a gas furnace to back up because there’s no fuel logistics involved. The grid comes back, your heat pump comes back.
For areas with frequent outages, a small portable generator that can run the heat pump’s blower and outdoor unit (typically 3,000-5,000 watts for residential systems) gets you through most events. Same hardware you’d buy for your furnace.
And there’s an upside the gas furnace can’t match. If you’re anywhere close to a renewable energy mix (or you install solar plus battery on your own roof), your heat pump may be on a path toward energy-free heating and cooling. Sunlight goes in, refrigerant moves, room temperature changes. No combustion, no fuel deliveries, no fuel price spikes. How neat is that.
Myth 7: “Refrigerants are dangerous.”
Modern A2L refrigerants, R-32 and R-454B, are classified as “mildly flammable, low toxicity” by ASHRAE.
To put this in actual perspective: R-454B’s Lower Flammability Limit concentration is nearly 10 times higher than that of propane, which means you’d need 10 times more refrigerant by volume in a confined space to even theoretically support combustion. And propane flames spread 7 to 30 times faster than A2L refrigerants if ignition does happen. That’s why ASHRAE classifies them as “2L” (low burning velocity) rather than “2” or “3.”
For comparison: the propane in your gas grill is rated A3 (highly flammable). The natural gas piped into your home is also highly flammable. The refrigerant in your heat pump is by every measurable safety metric less hazardous than either of those, and you’ve been living with both of those for decades without losing sleep.
R-32 has been in over 160 million residential air conditioning units globally, particularly in Japan, Australia, and across the EU, without widespread safety issues. The American market is catching up because of the EPA’s AIM Act phase-out of high-GWP refrigerants like R-410A.
The handling story:
- Modern A2L equipment has refrigerant leak detection sensors as a standard feature
- Installation requires updated tools and procedures, which is why you want an installer trained on the new refrigerants
- Service requires a slightly different set of recovery and charging equipment
- For you as a homeowner once it’s installed, daily operation is identical to any older system. You won’t notice.
And the bonus: A2L refrigerants don’t eat the ozone layer like the old Freon (R-22) did. R-22 got phased out for that reason in 2020. The replacements have been getting better with each generation, both for the planet and for your safety.
Myth 8: “My friend paid way more than expected and the damned thing died 3 years in with a new compressor.”
Yep. This is the classic problem with heat pumps. It’s not the pump. It’s the installer.
A poorly commissioned heat pump dies in three years. A correctly commissioned heat pump runs 15+. The difference is whether the installing tech pulled a proper vacuum (held at 500 microns for at least 15 minutes), measured superheat and subcooling correctly, verified refrigerant charge to within ±10%, and produced a commissioning report that documents all of it.
Most don’t. Across the industry, 70% of heat pumps are not commissioned to ACCA standards, and the industry-average install callback rate sits near 23%.
It’s also not the customer’s fault. Most homeowners cannot tell from the outside whether a heat pump has been installed correctly, charged correctly, or sealed correctly. The unit looks the same on day one whether it was commissioned to spec or rushed through to make the schedule. You only find out three years later when the compressor fails.
A few things are starting to change this:
Better commissioning tools. MeasureQuick and similar Bluetooth-probe platforms let a contractor verify every parameter and hand the homeowner a digital report with timestamped data. If your installer uses one, you have evidence the system was set up correctly. If they don’t, you don’t. Ask.
Continuous monitoring. A new generation of sensors can sit non-invasively on a heat pump and watch the operating parameters over time. When refrigerant starts to drift outside the operating window, when compressor temperatures climb above safe limits, when something is heading toward failure, the data shows it weeks or months before the unit actually breaks. The contractor can intervene during normal service hours, not on a 105°F Saturday afternoon at emergency rates. Thalo Labs is one company building this kind of monitoring directly into the equipment with their Sidekick sensor, focused initially on commercial fleets where the install-quality problem is most expensive. Expect similar tools to land on the residential side over the next few years.
The takeaway: pick your contractor like you’d pick a surgeon. Ask about commissioning methodology. Ask for the report. Ask how many heat pumps they installed last year. Ask what their callback rate is. Most won’t have crisp answers, and that’s the signal.
Still nervous? Talk to a heat-pump-native installer who actually does this every day, or start with the selector wizard to see what fits your home.