Heat Pump vs Furnace
The verdict
In mild and moderate winter climates, roughly the southern half of the country, a heat pump is usually the better economic and comfort choice. In cold northern climates, a gas furnace or a dual fuel pairing of both still wins for many homes, though modern cold climate heat pumps have erased much of the old performance gap.
The heat pump versus furnace decision shapes your comfort, utility bills, and carbon footprint for the next 15 to 20 years. A heat pump moves heat with electricity and doubles as your air conditioner, while a gas furnace burns fuel for powerful, fast heat. The right answer depends heavily on your climate and energy prices.
Heat Pump vs Gas Furnace at a glance
| Heat Pump | Gas Furnace | |
|---|---|---|
| How it heats | Moves heat from outdoor air | Burns natural gas or propane |
| Also cools? | Yes, built in | No, needs separate AC |
| Installed cost | $6,000 to $14,000 | $4,000 to $8,500 (furnace only) |
| Efficiency | 200 to 400 percent (COP 2 to 4) | 80 to 98 percent AFUE |
| Best climate | Mild to cold with modern units | Cold to severe winters |
| Typical lifespan | 12 to 16 years | 18 to 25 years |
Heat Pump
Pros
- One system heats and cools
- Two to four times the efficiency of any furnace
- No combustion, no CO risk, no gas line needed
- Qualifies for major federal and state incentives
Cons
- Output drops in extreme cold on standard models
- Electric backup heat is expensive when triggered
- Shorter lifespan due to year round use
Gas Furnace
Pros
- Powerful fast heat regardless of outdoor temperature
- Long service life
- Lower upfront cost when ducts and AC exist
- Cheap operation where gas is inexpensive
Cons
- Does nothing for cooling
- Combustion safety and CO monitoring required
- Fossil fuel price and policy exposure
Performance
A furnace delivers hot, fast supply air around 120 degrees and shrugs off any cold snap. Standard heat pumps supply gentler 90 to 105 degree air and lose capacity below freezing, but modern cold climate models maintain full output near zero and operate to minus 13 and beyond.
Efficiency
Heat pumps are the clear efficiency winner, delivering 2 to 4 units of heat per unit of electricity versus a maximum of 0.98 for the best furnace. Whether that wins on cost depends on local gas versus electric prices; cheap natural gas can still undercut heat pump operating costs in cold regions.
Maintenance
Both need annual professional service. Heat pumps run year round so components accumulate hours faster, while furnaces add combustion specific checks like heat exchanger inspection and CO testing.
Repair costs
Typical heat pump repairs run $150 to $2,500 with reversing valves and defrost controls as heat pump specific items. Furnace repairs run $150 to $2,000, with heat exchanger failure being the big ticket item that usually forces replacement.
Who should choose Heat Pump
Homes in mild to moderately cold climates, all electric homes, owners claiming electrification incentives, and anyone replacing both heating and cooling at once.
Who should choose Gas Furnace
Homes in severe winter climates with cheap natural gas, existing modern AC, or owners who want maximum heat output and system longevity.
Heat Pump vs Furnace FAQ
Do heat pumps work below freezing?
Yes. Standard heat pumps lose efficiency below about 25 to 30 degrees and lean on backup heat, but cold climate models deliver full rated heating at 5 below zero and keep working to minus 13 or lower. Brand and model selection matters greatly in northern states.
What is a dual fuel system?
A dual fuel setup pairs a heat pump with a gas furnace as its backup. The heat pump handles efficient heating in mild weather, and the furnace takes over below a set balance point. It is often the ideal solution in cold climates with gas service.
Which is cheaper to run, a heat pump or gas furnace?
At average national prices, a heat pump costs less to run in mild and moderate climates. Where natural gas is cheap and winters are severe, a high efficiency furnace can still win. Compare your local rates: a heat pump with COP 3 beats gas when electricity costs less than about three times the per BTU price of gas.