No, heat pumps usually do not use a lot of electricity for the amount of heating they provide. Heat pumps run on electricity, but they move heat from outside instead of generating heat directly. An ENERGY STAR certified air-source heat pump can deliver up to three units of heat for every unit of electricity it uses.
The answer depends on the heating system a heat pump replaces:
- Electric baseboard heaters or an electric furnace: A heat pump usually uses much less electricity. The U.S. Department of Energy says modern heat pumps can reduce electricity use for heating by up to 75% compared with electric resistance heating.
- A gas furnace: A heat pump uses more electricity because it replaces gas with electric heating. Whether it lowers your total energy bill depends on local electricity and gas prices, system efficiency and the home's heating demand.
- A standard air conditioner: A heat pump uses electricity in a similar way for cooling, but it can also heat the home.
Heat Pump Electricity Use at a Glance
| Question | Short answer |
|---|---|
| Does a heat pump use electricity? | Yes |
| Is it usually electricity-intensive? | No, not compared with electric resistance heating |
| Can it use more electricity in cold weather? | Yes. It may run longer and use backup heat |
| Will it always lower your energy bill? | No. Savings depend on the system it replaces and local energy prices |
| What commonly increases electricity use? | Electric backup heat, poor insulation, leaky ducts, incorrect sizing and dirty filters |
Why Heat Pumps Can Use Less Electricity
An electric furnace or baseboard heater converts electricity directly into heat. A heat pump uses electricity to run a compressor and fans, then transfers heat from outdoor air into the home.
This transfer process lets a heat pump provide more heat energy than the electrical energy it consumes. ENERGY STAR says certified air-source heat pumps can deliver up to three times more heat energy than the electricity they use.
For example, a home that needs 10,000 British thermal units of heat per hour would require about 0.98 kilowatts of electrical input if the heat pump operates at a COP of 3. This is an illustration, not a typical whole-house electricity figure. Actual consumption changes with outdoor temperature, equipment efficiency and the home's heating load.
How Much Electricity Does a Heat Pump Use?
There is no single electricity-use figure for every heat pump. Consumption depends mainly on:
- Home size and insulation
- Outdoor temperature
- Thermostat setting
- Heat pump capacity and efficiency
- How long the system operates
- Whether electric resistance backup heat turns on
- Ductwork condition and installation quality
A small, well-insulated home with a ductless mini-split may use much less electricity than a large, poorly insulated home with a ducted system. A heat pump that is too large, too small or incorrectly installed may also operate less efficiently.
The Department of Energy identifies oversizing, incorrect refrigerant charging and leaky ducts as causes of efficiency losses.
The main ratings to compare are:
- COP: Heating output compared with electrical input at a specific operating condition.
- HSPF2: Seasonal heating efficiency for air-source heat pumps.
- SEER2: Seasonal cooling efficiency.
Higher ratings generally indicate lower electricity use for the same heating or cooling output. Your actual bill will also depend on the climate, thermostat settings and how much heating your home needs.
Do Heat Pumps Use More Electricity in Winter?
Usually, yes. A heat pump may run longer in cold weather because the home loses heat faster and the outdoor air contains less readily available heat.
Modern cold-climate heat pumps are designed to operate at low temperatures. ENERGY STAR says cold-climate air-source heat pumps can continue working below 5°F, although another energy source may be more efficient at even lower temperatures.
Cold weather does not automatically make a heat pump inefficient. It can increase electricity use because:
- The compressor works harder.
- The system runs for longer.
- Defrost cycles happen more often.
- Electric resistance backup heat may turn on.
What Is Auxiliary or Emergency Heat?
Many heat pump systems include electric resistance heating elements. These elements provide extra heat when the heat pump cannot meet the demand on its own, but they usually use much more electricity than the heat pump compressor.
The Department of Energy advises limiting electric resistance heat because of its higher energy use. A heat-pump-compatible thermostat, correct system sizing and proper commissioning can help prevent unnecessary auxiliary heat use.
A sudden increase in winter electricity use can indicate that:
- The thermostat is set to "Emergency Heat."
- The system is activating "Aux Heat" frequently.
- The outdoor unit has a problem.
- The home lacks adequate insulation or air sealing.
- The heat pump is undersized for the property.
- The backup heat settings are incorrect.
Do Heat Pumps Use More Electricity Than Gas Heating?
Yes, usually, because a gas furnace uses gas as its primary heating fuel while a heat pump uses electricity. Electricity consumption alone does not determine the total heating cost.
A heat pump may be financially attractive when it replaces:
- Electric baseboard heating
- An electric furnace
- An older air conditioner and separate heating system
- Expensive oil or propane heating
The result is less certain when a heat pump replaces an efficient natural gas furnace. To compare the systems, you need the local electricity rate, gas price, heat pump efficiency, furnace efficiency and annual heating demand.
A heat pump can also provide both heating and cooling, which may reduce the need to maintain separate heating and air-conditioning equipment.
How to Reduce Heat Pump Electricity Use
The most effective steps are:
- Choose an ENERGY STAR certified model suited to your climate.
- Select a cold-climate model if winter temperatures regularly fall below freezing.
- Have the system sized with a professional heating and cooling load calculation.
- Seal air leaks and improve insulation before or alongside installation.
- Keep filters clean and maintain the outdoor coil.
- Repair leaking or poorly insulated ducts.
- Avoid large thermostat setbacks that can trigger backup resistance heat.
- Ask the installer how auxiliary and emergency heat are configured.
- Use the system consistently instead of switching between heating modes frequently.
The Department of Energy recommends weatherizing older homes to improve heat pump comfort and savings. ENERGY STAR recommends annual professional servicing for heating and cooling equipment.
Bottom Line
When comparing a heat pump with another heating system, look at total annual energy cost rather than electricity use alone. Heat pumps usually offer the largest electricity savings when they replace electric resistance heating. When they replace gas heating, electricity use will rise, so the result depends on local fuel prices, equipment efficiency, climate and the home's heating demand.