- Heat pumps move heat instead of making it, so they deliver about 2–3 units of heat per unit of electricity over a season.
- They usually save a lot against electric baseboards, heating oil and propane. Against cheap natural gas, they may cost more to run.
- The main disadvantages: upfront cost, weaker performance in deep cold (less so for cold-climate models), possible electrical or duct upgrades, and installer quality.
- Run your own numbers in the calculator below with this winter’s EIA fuel prices.
What are the disadvantages of a heat pump, and is it worth it anyway? Heat pumps get a lot of praise, and much of it is deserved. But they aren’t right for every home, and some drawbacks catch buyers off guard. This guide explains how they save energy, compares running costs with gas, oil, propane and electric heat using this winter’s official prices, and lays out the real downsides and how to reduce them.
How a Heat Pump Saves Energy
A heat pump doesn’t burn fuel or heat a coil. In winter it pulls heat from the outdoor air and moves it inside; in summer it works like an air conditioner and moves heat out. Moving heat takes less energy than creating it. The measure is the coefficient of performance (COP): a seasonal COP of about 2–3 means 2–3 units of heat for every unit of electricity. The Department of Energy says heat pumps can cut electricity use for heating by about half compared with electric resistance heat such as baseboards.
A heat pump is basically an air conditioner that can run in reverse. So the real comparison is often a heat pump versus a furnace plus a new AC, which changes the math in its favor when your AC is due anyway.
Will a Heat Pump Save You Money? Calculator
Use your bills for best results. It’s an estimate: your climate, insulation and the installer’s sizing change real results.
Heating only; it ignores cooling, maintenance and gas customer charges you might drop by going all-electric.
What Are the Disadvantages of a Heat Pump?
1. The upfront cost can be high
Many cost guides put a ductless single-zone system at roughly $1,500–$5,000 installed and a whole-home ducted system at about $8,000–$15,000; cold-climate models cost more. The federal 25C credit for heat pumps ended for systems placed in service after 2025. To reduce it: get three quotes, check utility and state rebates, and switch when your furnace or AC needs replacing anyway. See our heat pump installation cost guide.
2. Performance drops in deep cold
With less heat outside, a heat pump loses capacity and efficiency. Newer cold-climate models keep working well below 0°F, but some very cold homes still keep backup heat. To reduce it: choose a model rated for your climate, or a dual-fuel setup that uses your gas furnace only on the coldest days.
3. Cheap gas can erase the savings
As the chart shows, at this winter’s average prices a gas furnace can cost less to run than a heat pump. Heat pumps win clearly against oil, propane and electric resistance. Against gas, the answer depends on your local prices, and on whether you also need a new AC.
4. Your home may need upgrades
Leaky homes and ducts make any system work harder. Some homes also need a new circuit or a bigger electrical panel. To reduce it: air-seal and insulate first, and have the installer inspect ducts and the panel.
5. Noise and defrost cycles
The outdoor unit makes some noise, and in winter it defrosts now and then, sometimes with a puff of steam. That’s normal. To reduce it: place the unit away from bedroom windows and on a raised pad clear of snow.
6. Air can feel cooler
Heat pumps deliver warm, not hot, air for longer periods, which some people used to furnaces notice at first.
7. Installation quality matters more
Wrong sizing, poor refrigerant charge or bad settings cut efficiency and comfort. Setbacks that are too deep can trigger electric backup heat and spike the bill. To reduce it: ask for a load calculation (Manual J), choose an experienced installer, and keep temperatures steady. The Department of Energy’s Energy Saver Guide also warns against setbacks that bring on backup resistance heat, and suggests a thermostat designed for heat pumps.
What Real Owners Say
These are individual experiences, summarized in our own words.
A Massachusetts homeowner with a 3,000 sq ft house said switching from oil heat and old AC to a heat pump cut average heating and cooling costs from about $850 a month to about $250, even with an EV charging on the same bill. Winter bills never topped $250 at 68°F, and the basement lost its oil smell.
Source: The Cool Down (Reddit report)An owner warned that dropping the thermostat a lot overnight made the auxiliary electric heat kick in to recover in the morning, which sent the electric bill much higher. Heat pumps work best holding a steady temperature.
Source: The Cool Down (Reddit report)- Fuel prices from the EIA Winter Fuels Outlook 2026–27
- Typical efficiencies for furnaces and seasonal COP ranges for heat pumps
- Energy savings claims from the Department of Energy
- Owner experiences, good and bad, with links
This guide compares heating types, not brands. No manufacturer or installer paid to be included.
Who Should Probably Wait
- You have cheap gas, a working furnace and a newer AC.
- Your home is very leaky and you haven’t air-sealed or insulated yet.
- You live in a very cold area and can’t keep backup heat.
- Your electrical panel needs an expensive upgrade and rebates won’t help.
Frequently Asked Questions
Are heat pumps worth it?
Usually yes if you heat with oil, propane or electric baseboards, or need a new AC anyway. With cheap natural gas, savings can be small or negative.
What are the disadvantages of a heat pump in cold weather?
Lower capacity and efficiency in deep cold. Cold-climate models handle sub-zero temperatures far better, but some homes still keep backup heat.
Do heat pumps raise your electric bill?
Yes, your electric bill goes up, but you stop paying for oil, propane or gas. What matters is the total.
How long do heat pumps last?
Often about 15 years, similar to central AC, depending on climate and maintenance.
Is there a tax credit for heat pumps in 2026?
No federal credit for systems placed in service after 2025. Check state and utility rebates.
Our Verdict
Heat pumps are worth it for most homes that heat with oil, propane or electric resistance, and for anyone replacing an AC. The disadvantages of a heat pump are real but manageable: upfront cost, deep-cold performance and the need for a good installer. If you have cheap gas and working equipment, run the calculator before you switch.
Keep reading
- Heat Pump Installation Cost in 2026: Prices, Quotes and How Not to Overpay: prices and quotes for a heat pump.
- Heat Pump Water Heater Cost and Savings in 2026: What It Is, What It Saves, Where It Fits: costs and payback of a heat pump water heater.
- Smart Thermostat Energy Savings: The Best Picks for 2026: how much a smart thermostat really saves.
Sources We Checked
- EIA Winter Fuels Outlook 2026–27
- U.S. Department of Energy, Energy Saver Guide (2022) (heat pump setbacks)
- EIA Electric Power Monthly, Table 5.6.A (average electricity prices by state)