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Heat pump vs furnace: which should you choose?
The short answer
A heat pump costs more upfront, typically $4,500 to $9,500 installed, heats and cools in one system, and wins on running cost in mild and moderate climates and anywhere electricity is reasonably priced. A gas furnace, $2,800 to $6,800 for the unit, wins on raw heating power in very cold climates and where natural gas is cheap. Cold-climate heat pumps have narrowed the gap considerably in the last decade.
This decision is really three: what fuel costs where you live, how cold your winters actually get, and whether you also need air conditioning. A home replacing both a furnace and an AC is comparing one heat pump against two appliances, which changes the upfront math completely.
Dual-fuel systems, a heat pump paired with a gas furnace that takes over in deep cold, are the premium answer in cold regions and price accordingly.
Side by side
| Factor | Heat pump | Gas furnace |
|---|---|---|
| Installed cost | $4,500 to $9,500 | $2,800 to $6,800, plus AC if needed |
| Also cools? | Yes, it is an AC in reverse | No |
| Best climate | Mild to moderate, modern units fine below freezing | Cold climates, cheap gas areas |
| Running cost driver | Electricity price and winter lows | Gas price |
| Lifespan | 12 to 18 years | 15 to 25 years |
| Heat feel | Gentler, longer cycles | Hot blasts, faster warm-up |
Running cost, honestly
Heat pumps move heat instead of making it, delivering two to three units of heat per unit of electricity in mild weather. That advantage shrinks as outdoor temperatures fall and backup heat engages. Pull your actual gas and electric rates and a contractor's operating-cost estimate for your climate zone before deciding: national averages will not answer a local question.
Current federal, state, and utility incentives for heat pumps can be substantial and change yearly. Verify the live programs, since they can erase the upfront gap entirely.
The verdict by situation
- Replacing furnace and AC together in a moderate climate: heat pump, usually
- Furnace only, cheap gas, cold winters, AC fine: furnace, without guilt
- No gas line at the house: heat pump beats oil, propane, and electric resistance on running cost
- Comfort complaints about dry, blast heating: heat pump's steady output is a genuine quality upgrade
Questions homeowners ask
Do heat pumps work below freezing?
Modern cold-climate models heat effectively to around 0 to minus 10 degrees Fahrenheit, with capacity falling as it gets colder. Sizing and model selection for your design temperature is the whole game.
What is backup heat?
Electric resistance strips or a paired furnace that assists in deep cold. It should engage rarely in a well-designed system. Frequent backup heat means a sizing or settings problem.
Can I keep my ducts?
Usually yes, if they are sized and sealed adequately. Duct condition matters even more for heat pumps, since their air runs cooler and longer.