The Core Difference: Efficiency
An electric resistance furnace (or electric baseboard heater) converts electricity into heat at 100% efficiency — 1 kWh in, 3,412 BTUs of heat out. A heat pump moves heat from outdoors to indoors rather than generating heat, achieving efficiencies of 200–400% (called COP: Coefficient of Performance) — 1 kWh in, 6,824–13,648 BTUs of heat out.
This efficiency difference is the entire story. A heat pump at COP 3.0 uses exactly one-third the electricity of an electric furnace to produce the same heating output. At today's electricity prices, this translates to enormous cost savings.
Cost Comparison: Running the Numbers
For a 1,500 sq ft home needing approximately 30 million BTUs of heating annually (moderate climate):
| System Type | Efficiency | kWh Needed | Annual Cost (17¢) | Annual Cost (25¢) |
|---|---|---|---|---|
| Electric resistance furnace | COP 1.0 | 8,797 kWh | $1,495 | $2,199 |
| Standard heat pump | COP 2.5 | 3,519 kWh | $598 | $880 |
| Modern cold-climate heat pump | COP 3.0 | 2,932 kWh | $498 | $733 |
| High-efficiency cold-climate HP | COP 3.5 | 2,513 kWh | $427 | $628 |
Annual savings from upgrading electric resistance to a standard heat pump: $897–$1,319/year. For a high-efficiency cold-climate heat pump: $1,068–$1,571/year.
Heat Pump Performance in Cold Climates
The historical knock on heat pumps was reduced performance in very cold weather. Traditional heat pumps struggled below 32°F and required backup electric resistance strips that negated some efficiency gains.
Cold-climate heat pumps (Mitsubishi, Bosch, Daikin, LG models) have changed this calculus dramatically. Modern variable-speed cold-climate heat pumps operate efficiently down to -13°F (-25°C), maintaining COP above 2.0 even at 5°F. NEEP (Northeast Energy Efficiency Partnerships) maintains a cold-climate heat pump list — models achieving COP 1.75+ at 5°F qualify.
Cities where cold-climate heat pumps now make financial sense (previously borderline): Minneapolis, Chicago, Detroit, Boston, Denver, Salt Lake City, and most other US metros except the extreme northern tier.
Ducted vs. Ductless (Mini-Split) Heat Pumps
- Central ducted heat pump: Replaces a central furnace/AC system. Best for homes with existing ductwork in good condition. Cost: $4,000–$12,000 installed.
- Ductless mini-split: Individual wall-mounted units per zone. No ductwork needed — ideal for adding heating/cooling to additions, finished basements, or replacing electric baseboard in individual rooms. Cost: $2,000–$5,000 per zone installed.
- Multi-zone mini-split: One outdoor unit serving 2–5 indoor units. Cost: $5,000–$15,000 installed for whole-home coverage.
Federal Incentives: The IRA Heat Pump Credits
The Inflation Reduction Act significantly improved federal incentives for heat pumps:
- 25C Tax Credit: 30% of heat pump installation cost, up to $2,000/year for heat pumps (separate from the $1,200 cap on other efficiency improvements)
- HEEHRA Rebates: Up to $8,000 rebate for heat pump installation for income-qualified households (income limits apply). Program availability varies by state.
A $8,000 heat pump installation could net out to $5,600 after the 30% tax credit — sometimes less with state rebates. This dramatically improves payback periods.
Heat Pump vs. Gas Furnace: The Broader Comparison
For homes currently on natural gas heating, the heat pump decision is more complex. Natural gas at $1.30/therm provides roughly the same economics as electricity at 5 cents/kWh for equivalent heat output. At current US electricity rates (17 cents/kWh average) and gas rates (~$1.30/therm), electric heat pumps at COP 3.0 are roughly cost-competitive with gas furnaces — and better in high-electricity-cost states where gas is cheaper per BTU.
The advantage of heat pumps over gas furnaces grows as:
- Natural gas prices increase
- Heat pump efficiency (COP) improves
- Carbon pricing eventually applies to gas
When to Replace Electric Resistance Heating
If you currently heat with electric resistance (electric furnace, electric baseboard, or electric coil heat strips in a forced-air system), replacing with a heat pump is almost always financially justified, even without incentives, if:
- Your electricity rate exceeds 12 cents/kWh
- You have significant heating needs (cold climate or poorly insulated home)
- Your existing electric heating equipment is more than 10 years old
The payback from eliminating electric resistance heating with a heat pump is typically 3–7 years without incentives and 2–5 years with the 30% federal tax credit.
Bottom Line
Heat pumps are dramatically more efficient than electric furnaces or baseboard heaters — typically 2.5–4x more efficient. For any home currently heating with electricity, switching to a heat pump is one of the highest-ROI energy improvements available, especially with today's federal incentives. Modern cold-climate models work well even in northern states. If your electric heating bill is a significant portion of your total electricity costs, get heat pump quotes — the savings are real and the payback periods are reasonable.