Heat Pump vs Gas Furnace 2025: Real Cost Numbers and When Gas Still Wins
Heat pumps now work down to −13°F and qualify for a $2,000 IRA tax credit. We break down COP, seasonal heating costs, and the one scenario where a gas furnace still makes financial sense.
By GasVsElectric
:::caution[Update — January 2026] The federal 25C heat pump tax credit discussed in this article has expired. The One Big Beautiful Bill Act (P.L. 119-21, signed July 4, 2025) terminated the Section 25C Energy Efficient Home Improvement Credit for installations completed after December 31, 2025. The $2,000 credit is no longer available for 2026+ installations. HEEHRA point-of-sale rebates (a separate spending program) remain available in some states for income-qualified households. :::
If you’re replacing a heating system in 2025, the heat pump conversation is unavoidable. Prices have come down, cold-climate models now work reliably at −13°F, and the federal tax credit knocks $2,000 off the installed cost. But natural gas is still cheap in most of the country, and a 96% AFUE furnace is genuinely hard to beat on operating cost per BTU in regions with cold winters and low gas prices.
Here’s how to think through the decision with real numbers.
What COP Actually Means
A heat pump’s efficiency is measured by its Coefficient of Performance — the ratio of heat energy delivered to electricity consumed. A COP of 3.0 means you get 3 kWh of heat for every 1 kWh of electricity you pay for. That’s effectively 300% efficient, which sounds impossible until you remember that a heat pump moves heat rather than generating it.
A gas furnace, by contrast, is limited by combustion thermodynamics. The best units on the market run at 98% AFUE, meaning 98 cents of every dollar of gas becomes usable heat. That sounds impressive, but at a COP of 1.0 equivalent, it can’t compete with a heat pump at COP 2.5 or higher — unless gas is cheap enough to make up the difference.
The crossover point where a heat pump and gas furnace cost the same to run depends on two numbers: your local electricity rate and your local gas rate. In 2025, the national average is roughly $0.16/kWh for electricity and $1.25/therm for natural gas. At those prices, a heat pump with a seasonal COP of 2.5 costs about the same as a 95% AFUE furnace.
Cold Climate Performance: The −13°F Threshold
The old knock against heat pumps — “they don’t work in real winters” — has become outdated. Cold climate heat pumps (sometimes called “hyper heat” or “cold climate” models from Mitsubishi, Bosch, and others) are rated to deliver 100% of their capacity at 17°F and meaningful output down to −13°F.
Below −13°F, even cold-climate models lose efficiency rapidly. If you live somewhere that regularly sees temperatures below −20°F — northern Minnesota, Alaska, the U.P. of Michigan — a gas furnace or a dual-fuel system (heat pump + gas backup) is still the safer choice.
For most of the continental U.S., including Chicago, Boston, and Denver, a cold-climate heat pump handles the full heating season without backup.
Real Annual Cost Comparison
Typical Midwest Home (1,500 sq ft)
Assumptions: 1,500 heating hours per year, $0.16/kWh electricity, $1.25/therm gas.
| System | Annual Heating Cost |
|---|---|
| Heat pump (COP 2.5) | ~$720 |
| Heat pump (COP 3.5, milder climate) | ~$514 |
| Gas furnace (95% AFUE) | ~$830 |
| Gas furnace (80% AFUE) | ~$985 |
These are operating costs only. Equipment cost and installation vary widely — a heat pump system typically runs $4,000–$10,000 installed; a gas furnace, $2,500–$6,000. The IRA credit changes that calculus.
The $2,000 IRA Tax Credit
The Inflation Reduction Act’s 25C tax credit covers 30% of the cost of a qualifying heat pump, up to $2,000 per year. “Qualifying” means the unit meets ENERGY STAR’s “Most Efficient” criteria, which most cold-climate heat pumps do.
Unlike the EV credit, this one is available every year — you can claim it again if you replace a water heater or install a heat pump dryer in a later year, up to the $2,000 cap per year.
At a $2,000 credit, the effective cost gap between a heat pump and a gas furnace narrows significantly. Combined with lower operating costs in most climates, payback periods of 5–8 years are realistic for homeowners switching from an aging gas furnace.
When a Gas Furnace Still Wins
There are genuine scenarios where gas remains the better choice:
Very low gas prices. In states like Louisiana, Oklahoma, and Texas, natural gas rates hover around $0.70–$0.90/therm. At those prices, a gas furnace’s operating cost undercuts a heat pump even at COP 3.0.
Extreme cold climates. If your design temperature is below −20°F and you’re not installing a dual-fuel system, a gas furnace is more reliable and lower-risk.
No duct work or poor duct work. Heat pumps move larger volumes of air at lower temperatures than gas furnaces, which means leaky or undersized duct systems that worked “well enough” with gas may underperform with a heat pump. Duct remediation adds cost.
Short time horizon. If you’re planning to sell in three years, the payback math may not favor the upfront premium.
The Bottom Line
For most U.S. homeowners with access to a cold-climate heat pump installer, the math in 2025 favors the heat pump — particularly after the $2,000 IRA credit. Operating costs are comparable to or better than a high-efficiency gas furnace in most regions, and the all-electric path makes sense if your grid is getting cleaner.
Gas furnaces still win on upfront cost, in very cold climates, and in regions with exceptionally cheap natural gas. A dual-fuel system — heat pump with gas backup that kicks in below a set point — splits the difference if you want insurance.
Run the numbers for your specific home size, local energy rates, and climate in our heat pump vs. gas furnace calculator.