Cost figures are broad editorial ranges. A written local quote and an on-site load calculation should replace them before you buy.
01The systems solve the problem differently
A furnace creates heat through combustion or electric resistance and distributes it through ducts. An air-source heat pump moves heat between outdoors and indoors, reversing in summer to provide air conditioning.
That difference affects quote comparisons. A heat-pump proposal may replace both the heating and cooling functions. A furnace-only price does not include central AC, so comparing those two headline numbers can be misleading.
02Side-by-side decision factors
| Factor | Heat pump | Gas furnace |
|---|---|---|
| Functions | Heating + cooling | Heating; separate AC normally required |
| Supply-air feel | Longer, moderate-temperature cycles | Shorter, hotter supply air |
| Best economics | Depends on COP and electricity rate | Depends on AFUE and delivered gas price |
| Cold-weather strategy | Cold-climate model, backup, or dual-fuel | Capacity less affected by outdoor temperature |
| On-site combustion | None for all-electric system | Requires venting and combustion safety |
03Compare operating cost with delivered heat
Convert both fuels into cost per unit of heat delivered to the home. For a heat pump, divide electricity cost by seasonal COP. For a furnace, divide the delivered gas cost by AFUE. Then adjust for fixed utility charges only if changing systems would let you eliminate the gas account entirely.
Do not use the equipment’s best laboratory efficiency for every winter hour. Seasonal performance, defrost, backup heat, thermostat strategy, and duct losses all matter.
04Climate and comfort
Modern cold-climate heat pumps can operate at low outdoor temperatures, but model-specific capacity matters. Ask for the unit’s published heating capacity at your local winter design temperature and the contractor’s backup-heat strategy.
Heat-pump air often feels less hot than furnace air even while the room remains comfortable. Good sizing favors longer cycles and steadier temperatures. Homeowners who expect rapid temperature recovery should discuss controls and setback behavior before installation.
05Who should consider dual-fuel
- Homes in colder climates with an existing usable gas furnace.
- Areas where gas becomes less expensive than heat-pump operation below a predictable temperature.
- Owners who want heat-pump cooling and shoulder-season efficiency with furnace backup.
- Projects where electrical service constraints make large resistance backup heat undesirable.
—Sources & verification
We link to primary or responsible sources so you can check current requirements before acting.
This guide is educational. Do not open electrical or refrigerant compartments, bypass safety controls, or handle refrigerant. Use qualified, properly licensed professionals where required.