Comparison

Heat pump vs. furnace and AC

A side-by-side on equipment, efficiency, running cost, comfort, and cold-weather performance, plus when a dual-fuel setup beats going all-electric.

Heat pump vs. furnace and AC

Where each system genuinely wins. Nothing here is universal, electricity and gas prices in your area decide most of it.

Heat pump

Gas furnace + AC

Equipment needed

One system, heating and cooling

Two systems to buy and maintain

Efficiency

250–400% (COP 2.5–4)

80–98% AFUE, never above 100%

Running cost

Usually lower, unless your electricity is expensive and your gas is cheap

Can win where gas is very cheap

Comfort feel

Long, steady cycles of ~95°F air; even temperatures

Short blasts of 130°F air; warmer then cooler

Very cold weather

Cold-climate models hold capacity to –5°F; below that, backup heat

Unaffected by outdoor temperature

Combustion & venting

None, no flue, no gas line, no CO risk

Flue, gas line, annual safety check

Federal tax credit

Qualifies for the 25C credit

Smaller credit, high-efficiency models only

When dual fuel beats an all-electric heat pump

If you already have a working gas furnace, a dual-fuel setup lets a heat pump handle the mild majority of the heating season while the furnace only kicks in below a switchover temperature you set. In regions where gas is cheap and electricity is expensive, this is often the lower-cost path, and it keeps a second heat source in the house in case one system needs service. Run your own numbers on the savings calculator, and check whether your equipment qualifies for a rebate or tax credit either way. For the full breakdown of how the switchover control actually works, see dual fuel vs. all-electric.