The decision matrix
| Factor | Heat pump wins | Furnace wins |
|---|---|---|
| Climate zone | Zones 1-5 (south, mid-Atlantic, Pacific Northwest) | Zones 6-7 (Northeast, Midwest, Mountain) |
| Gas price | > $0.85/therm | < $0.85/therm |
| Electric price | < $0.16/kWh | > $0.20/kWh |
| Existing heating | Replacing electric resistance / oil | Replacing gas furnace one-for-one |
| Service capacity | 200A+ electric service | 100A service (no panel upgrade needed) |
| State rebate | HEEHRA / Mass Save / NYSERDA available | No rebate available |
| AC needed too? | Yes (heat pump = heating + cooling in one unit) | No (heat-only need) |
Annual operating cost (the number that drives the math)
| System | Efficiency | Annual energy (avg 2,200 sqft, mod climate) | Annual cost |
|---|---|---|---|
| Cold-climate heat pump (COP 3.0) | HSPF2 10.5 | ~5,800 kWh | $928 |
| Standard heat pump (COP 2.5) | HSPF2 8.5 | ~7,000 kWh | $1,120 |
| 96% AFUE gas furnace | 96 AFUE | ~880 therms | $1,144 |
| 80% AFUE gas furnace | 80 AFUE | ~1,050 therms | $1,365 |
| Electric resistance furnace | 100% (resistive) | ~21,000 kWh | $3,360 |
Assumes $0.16/kWh electric, $1.30/therm gas, 60M BTU annual heating load. Cold-climate heat pump beats 96% gas furnace by ~$216/yr at these rates. Margin shrinks at $0.20/kWh and $1.00/therm, gas wins at those rates by ~$50/yr. Margin widens at $0.12/kWh, heat pump wins by ~$400/yr.
Install cost reality
| System | Equipment | Install labor + ductwork | Electrical / panel work | Total installed |
|---|---|---|---|---|
| Cold-climate heat pump (3-5 ton) | $4,000-$7,000 | $1,500-$3,500 | $0-$3,500 (panel upgrade if needed) | $5,500-$12,000 |
| 96% AFUE gas furnace + new AC | $3,500-$6,000 | $1,000-$2,500 | $0 | $4,500-$8,500 |
| Hybrid (heat pump + gas furnace) | $6,500-$10,000 | $2,000-$3,500 | $0-$3,500 | $10,000-$14,000 |
Cold-climate ratings, the spec that matters
Manufacturer marketing splashes the lowest operating temp like it's the whole story. It isn't. The spec that matters is rated heating capacity at 5°F, anything above 80% of nameplate is acceptable. Below 80%, the compressor is working past its design envelope and the unit is throwing electric resistance heat at the problem (which is what you bought a heat pump to avoid). Mitsubishi FX Hyper-Heat, Daikin Aurora, and Fujitsu XLTH all hit 100% nameplate at 5°F. Cheaper "cold-climate" units often hit 65-75% at 5°F, they'll run, but they're cycling through electric-strip backup and your bill reflects it.
The 25C credit is gone, what's left in 2026
The Inflation Reduction Act Section 25C heat pump federal credit expired December 31, 2025. State and utility rebates remain, and in many states are more generous than the old federal credit:
- HEEHRA point-of-sale rebates, up to $8,000 for income-qualified households on whole-home heat pump installs (state-administered, IRA-funded)
- Mass Save (Massachusetts), up to $10,000 for whole-home heat pump installs
- NYSERDA (New York): Clean Heat program rebates $1,000-$3,500
- Efficiency Maine, up to $4,000 ductless heat pump rebate
- PSE&G / Eversource / ConEd, varied utility programs $500-$2,500
Check DSIRE for your specific ZIP before any install conversation.
The hybrid (dual-fuel) option
Heat pump as primary heat above ~35°F, gas furnace as backup below. Captures the operating-cost savings of a heat pump in shoulder seasons (which is most of the year in mixed climates) plus the no-failure heat of gas in deep cold. Premium install ($10K-$14K) but lowest annual operating cost in mixed climates, typically beats heat-pump-only by $150-$300/yr and gas-only by $200-$400/yr.
Worth considering specifically in: Mid-Atlantic, Midwest with moderate winters, mountain west. Less compelling in: Deep South (gas barely runs) or Northeast/upper Midwest (cold-climate heat pump alone now competitive).
FAQ
Is a heat pump cheaper to run than a furnace?
Yes in mild climates. Above $0.85/therm gas pricing and below $0.16/kWh electric, heat pumps win. Cold-climate-rated units required for northern climates.
Install cost difference?
Heat pump: $5,500-$12,000. Furnace: $4,500-$8,500. Delta: $1,000-$3,500. Hybrid: $10,000-$14,000.
Will a heat pump work in cold climates?
Cold-climate models (Mitsubishi FX, Daikin Aurora, Fujitsu XLTH) run continuously to -13°F. Verify rated heating capacity at 5°F, above 80% nameplate is acceptable.
Did the heat pump tax credit expire?
Federal 25C: yes, December 31, 2025. State/utility rebates remain. Check DSIRE.
What's a hybrid (dual-fuel) heat pump?
Heat pump + gas furnace backup. Heat pump above ~35°F, gas below. Premium install, lowest operating cost in mixed climates.
The bottom line
If you're in a mild climate (Zones 1-4) replacing AC plus heat: cold-climate heat pump wins on operating cost and avoids the gas-line install. If you're in deep cold (Zone 6-7) on a tight budget: 96% AFUE gas furnace beats a marginal heat pump install. If you're in a mixed climate and can afford it: hybrid dual-fuel is the operating-cost winner. The right answer depends on your zip code, your gas-vs-electric rate ratio, and whether your state offers HEEHRA-class rebates. Stop deciding from the SERP. Get three install quotes that include both options.
Editorial standards: Cited authorities include DOE Energy Saver heat pump guide, ENERGY STAR Most Efficient list (cold-climate heat pumps), HSPF2/SEER2 ratings per 2023 DOE test procedure, AHRI Directory of Certified Product Performance, DSIRE database of state and utility incentives. Reviewed by Al, Building Doctor, IUOE Local 39 Stationary Engineer.