Heat pumps run on electricity, not gas
A heat pump is an all-electric system. It uses electricity to power a compressor and fan that move heat from one place to another—either pulling warmth from outside air into your home in winter, or pulling it out in summer. There is no gas burner inside a heat pump, no combustion, and no natural gas line required to run one.
This is the core difference between a heat pump and a traditional furnace or boiler. A furnace burns gas to create heat. A heat pump straightforward relocates heat that already exists. Because it moves heat rather than making it, a heat pump uses less energy overall—typically 2 to 3 times less electricity than the energy content of the gas a furnace would burn to heat the same space.
The electricity comes from your home's main electrical panel, the same way your refrigerator or air conditioner does. If your home has no gas line at all, a heat pump works fine. If you do have gas service, you can keep it for cooking or water heating while running the heat pump on electricity alone.
Key Takeaways
- Heat pumps are powered entirely by electricity and contain no gas burner or combustion chamber.
- A heat pump moves existing heat rather than creating it by burning fuel, which is why it uses less energy than a gas furnace.
- You do not need a natural gas line to install or run a heat pump—it connects only to your electrical panel.
- If you have a gas line for other appliances, you can keep it while switching to an electric heat pump for heating and cooling.
How a heat pump uses electricity instead of gas
Inside a heat pump, electricity powers a compressor—a pump that circulates refrigerant through a closed loop of copper tubing. In winter, the refrigerant absorbs heat from the outdoor air (even when it feels cold outside, heat energy is still present) and carries it indoors. In summer, the process reverses: the refrigerant pulls heat from inside your home and releases it outdoors.
A gas furnace, by contrast, burns natural gas in a combustion chamber to generate heat, then blows that heat through your ducts. It requires a gas line, a vent to the outside, and a pilot light or ignition system. A heat pump needs none of these. It only needs electricity and refrigerant.
The compressor and fan in a heat pump do draw power from your electrical panel, so your electric bill will increase when you heat with a heat pump instead of a furnace. However, because the system moves heat rather than creating it, the total energy cost is usually lower than heating with gas—even accounting for the higher price of electricity per unit compared to gas in many regions.
What happens in very cold weather
In climates where winter temperatures drop well below freezing, a heat pump's efficiency declines because there is less heat available in the outdoor air to move inside. Many heat pump systems include a backup electric heating element—essentially a large resistor that generates heat directly, similar to a space heater. This backup kicks in automatically when outdoor temperatures fall below a certain threshold, usually around 35°F to 40°F depending on the system.
This backup heating is still electric, not gas. It uses more electricity than the heat pump itself, so running on backup heat for extended periods will raise your electric bill. In regions with very harsh winters, some homeowners keep a gas furnace as a secondary system alongside the heat pump, using the furnace only on the coldest days. This hybrid approach is sometimes called a dual-fuel system, though the heat pump itself still runs on electricity alone.
Connecting a heat pump to your home's electrical system
A heat pump requires a dedicated circuit from your electrical panel, usually a 240-volt line (the same voltage that powers an electric dryer or air conditioner). An electrician will run this line from your panel to the outdoor unit and indoor unit. The installation does not involve your gas line at all.
If your home currently has only a gas furnace and no air conditioning, adding a heat pump means running new electrical wiring. This is more involved than straightforward swapping out the furnace, but it does not require any gas work. Your gas line can remain in place for other appliances like a water heater, stove, or fireplace.
The cost of electrical work varies by how far the panel is from where the heat pump will be installed and whether your panel has available capacity. An electrician can assess this during a site visit and give you a specific estimate.
Why some people confuse heat pumps with gas systems
The confusion often arises because heat pumps are sometimes marketed as a replacement for furnaces, and furnaces are gas appliances in many homes. Additionally, some older or less common heating systems do use gas to power a heat pump compressor—these are called gas-fired heat pumps, and they are rare in residential homes in North America. The vast majority of residential heat pumps sold today are electric.
Another source of confusion is the term "hybrid heat pump" or "dual-fuel system," which combines an electric heat pump with a gas furnace. In this setup, the heat pump runs on electricity most of the time, and the furnace kicks in only during very cold weather. The heat pump itself is still electric; the gas furnace is a separate backup system.
Maintenance and operating costs for electric heat pumps
Because a heat pump has no combustion, it requires no annual gas line inspection, no flue cleaning, and no pilot light maintenance. You will need to keep the outdoor unit clear of leaves and debris, have the refrigerant checked periodically, and replace the air filter regularly—similar to air conditioner maintenance.
Operating costs depend on your local electricity rates and how efficiently your heat pump runs in your climate. In regions with mild winters and high gas prices, an electric heat pump is usually cheaper to run than a gas furnace. In regions with very cold winters and cheap gas, the comparison is closer, especially if the heat pump runs on backup electric heat for many days. An HVAC contractor can estimate your likely heating costs based on your home's size, insulation, and local weather patterns.
Frequently Asked Questions
Can I run a heat pump if I don't have natural gas service?
Yes. A heat pump requires only electricity, so it works in homes with no gas line at all. This is one reason heat pumps are popular in areas where gas service is not available or is very expensive.
Will my electric bill go up if I switch from gas heat to a heat pump?
Your electric bill will increase, but your total heating cost (electric bill plus gas bill) usually decreases because a heat pump uses less total energy than a gas furnace. The exact savings depend on your local electricity and gas rates, your home's insulation, and your climate.
What is a dual-fuel or hybrid heat pump system?
A dual-fuel system pairs an electric heat pump with a gas furnace. The heat pump runs most of the year on electricity. When outdoor temperatures drop very low, the gas furnace automatically takes over. The heat pump itself still runs on electricity; the gas furnace is a backup system.
Does a heat pump need a gas line installed?
No. A heat pump connects only to your electrical panel. If you currently have a gas furnace, you can remove the gas line when you replace it with a heat pump, or keep the line if you use gas for other appliances like water heating or cooking.
How much electricity does a heat pump use compared to a furnace?
A heat pump typically uses 2 to 3 times less energy than a gas furnace to produce the same amount of heat, because it moves heat rather than creating it through combustion. However, the actual cost depends on your local electricity rates versus gas rates.