Heat Pump vs. AC and Furnace: Cost Comparison
A heat pump heats and cools with one outdoor unit. The traditional setup pairs a central AC with a gas or electric furnace. Here is how they compare on installed cost, running cost and climate fit.
Short answer: One heat pump usually costs less than a new AC plus a new furnace.
Installed cost
A 3-ton standard heat pump runs about $6,800 to $11,700 installed. A 3-ton mid-efficiency AC runs about $6,800 to $10,200, and a 95% gas furnace about $4,600 to $7,900, so buying both usually costs more than one heat pump.
If you already have a working furnace and only need cooling, replacing just the AC is the cheapest path.
| Option | Installed cost | Typical life |
|---|---|---|
| Heat pump, 3 tons | $6,800 to $11,700 | Heats and cools |
| Cold-climate heat pump, 3 tons | $9,200 to $15,600 | Heats and cools, rated for deep cold |
| Central AC, 3 tons | $6,800 to $10,200 | Cooling only |
| Gas furnace, 95% AFUE | $4,600 to $7,900 | Heating only |
Running cost
A heat pump moves heat instead of making it, so it delivers more heat per dollar of electricity than an electric furnace and often competes with gas. Where natural gas is cheap and winters are long, a gas furnace can still be cheaper to run. Where electricity is reasonably priced or gas is not available, the heat pump usually wins.
Compare using your own utility rates. Installers can run the numbers with local prices.
Climate fit
Standard heat pumps lose capacity as temperatures drop below freezing. Cold-climate models keep heating efficiently well below zero, and many systems include backup electric heat strips for the coldest days. Dual-fuel setups pair a heat pump with a gas furnace so each runs when it is cheapest.
Which should you choose?
Choose a heat pump if you need both heating and cooling replaced, your climate is mild to moderate, or you want to move off gas. Choose AC plus furnace if you have cheap gas, a furnace with life left in it, or very long, severe winters and no interest in a cold-climate model.
Common questions
Is a heat pump cheaper than AC and a furnace?
Usually yes when both are being replaced, since one system does both jobs. The savings shrink if you only need one of the two.
Do heat pumps work in cold climates?
Modern cold-climate models are rated to heat well below zero. Standard models are better suited to mild winters.
Are there rebates for heat pumps in 2026?
The federal tax credit ended for systems installed after 2025, but many states and utilities still offer rebates.