Heat Pump vs Gas Furnace 2026: Real Cost Numbers and When Gas Still Wins
Heat pumps now work down to −13°F. We break down COP, seasonal heating costs, and the one scenario where a gas furnace still makes financial sense.
By ElectricVsGas
If you’re replacing a heating system, the heat pump conversation is unavoidable. Prices have come down and cold-climate models now work reliably at −13°F. 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 2026, the national average is roughly $0.19/kWh for electricity and $1.50/therm for natural gas. At those prices, a heat pump with a seasonal COP of about 3.5 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The old knock against heat pumps — “they don’t work in real winters” — has become outdated.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 full capacity at 5°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: ~38 MMBtu of delivered heat per year, $0.19/kWh electricity, $1.50/therm gas.
| System | Annual Heating Cost |
|---|---|
| Heat pump (COP 2.5) | ~$845 |
| Heat pump (COP 3.5, milder climate) | ~$605 |
| Gas furnace (95% AFUE) | ~$600 |
| Gas furnace (80% AFUE) | ~$715 |
Notice the crossover: at national average rates, a heat pump needs a seasonal COP of about 3.5 to match a 95% AFUE furnace on operating cost. That’s achievable in mild and moderate climates, harder in severe ones — which is why your local rates and climate, not the technology, decide this comparison.
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 $2,000 IRA Tax Credit (Historical — Expired Dec 31, 2025)
The Inflation Reduction Act’s 25C tax credit covered 30% of the cost of a qualifying heat pump, up to $2,000 per year. “Qualifying” meant the unit met ENERGY STAR’s “Most Efficient” criteria, which most cold-climate heat pumps did.
Unlike the EV credit, this one was available every year — homeowners could claim it again if they replaced a water heater or installed a heat pump dryer in a later year, up to the $2,000 cap per year.
The credit was terminated for installations completed after December 31, 2025 by P.L. 119-21. For 2026 installations, no federal credit applies. State and utility rebates remain available in many states — check your state energy office for current programs.
When a Gas Furnace Still Wins
There are genuine scenarios where gas remains the better choice:
Very low gas prices. In states like Idaho and Montana, natural gas rates run around $0.74–$0.87/therm — well below the national average. 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
Where electricity is cheap relative to gas — hydro-rich states, much of the South — or where one heat pump replaces both a furnace and an aging air conditioner, the math favors the heat pump. At national average prices against cheap natural gas, a high-efficiency furnace is still modestly cheaper to run, and the all-electric case rests on rebates, AC replacement value, and a cleaner grid rather than fuel savings alone. State or utility rebates can still narrow the upfront cost gap — check your state energy office for current programs.
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.