Electric resistance heating — baseboard heaters, wall heaters, electric strip heat in air handlers — has a COP of exactly 1.0. Every unit of electricity in becomes one unit of heat out. A heat pump doesn't burn electricity to make heat; it moves heat from outside air into your home. At typical winter temperatures, a modern heat pump delivers 2–4 units of heat per unit of electricity consumed. That efficiency gap is what makes the comparison so dramatic.
Disclaimer: Cost comparisons use EIA national average electricity rate of $0.16/kWh as of early 2026. Actual operating costs depend on your local utility rate, climate zone, thermostat settings, and home insulation. Heat pump performance data is based on NEEP cold-climate ASHP product database specifications. Consult a licensed HVAC contractor before making heating system decisions.
Key Takeaways
- Electric resistance heating has COP 1.0 — every kWh in = one kWh of heat out
- A heat pump at COP 3.0 delivers 3× more heat per kWh, cutting heating electricity use by 67% versus resistance
- At $0.16/kWh and 2,000 sq ft home in Climate Zone 5, switching from resistance to heat pump saves roughly $800–$1,200/year
- Heat pump payback over electric resistance baseline: typically 3–6 years — faster than nearly any other HVAC upgrade
- Resistance heating still makes sense in very small spaces, as supplemental heat in extreme cold, and where heat pump installation isn't practical
The Math Behind COP
COP (Coefficient of Performance) is the efficiency ratio that makes everything else make sense. An electric resistance heater always has COP 1.0 — that's physics. A heat pump extracts ambient heat from outdoor air (or the ground), amplifying it with a relatively small amount of electricity.
| System | COP | kWh of Heat per kWh Electricity | Relative Efficiency |
|---|---|---|---|
| Electric resistance (baseboard, strip) | 1.0 | 1.0 kWh | Baseline |
| Standard heat pump at 47°F | 3.0–4.0 | 3.0–4.0 kWh | 300–400% of resistance |
| Cold-climate heat pump at 17°F | 2.0–3.0 | 2.0–3.0 kWh | 200–300% of resistance |
| Cold-climate heat pump at 0°F | 1.5–2.3 | 1.5–2.3 kWh | 150–230% of resistance |
| Cold-climate heat pump at -13°F | 1.0–1.5 | 1.0–1.5 kWh | 100–150% of resistance |
Even at -13°F — the coldest rated operating temperature for the best cold-climate heat pumps — the system is still more efficient than pure resistance heating. The efficiency advantage is most pronounced at mild winter temperatures, which represent the majority of heating hours in most U.S. climates.
Annual Operating Cost Comparison
At $0.16/kWh (2026 national average, per the U.S. Energy Information Administration), here's what a 2,000 sq ft home in Climate Zone 5 (Upper Midwest/Mid-Atlantic) pays for heating under each scenario:
| Heating System | Average COP | Annual Electricity for Heat | Annual Cost |
|---|---|---|---|
| Electric resistance (baseboard) | 1.0 | ~12,500 kWh | $2,000 |
| Standard heat pump (HSPF2 8.0) | ~2.3 | ~5,400 kWh | $870 |
| Cold-climate heat pump (HSPF2 10+) | ~2.9 | ~4,300 kWh | $690 |
Switching from electric resistance to a cold-climate heat pump saves approximately $1,310/year in this scenario. At that rate, a $6,000 installed heat pump (net of Section 25C credit) pays back in roughly 4.5 years.
Payback Period: Heat Pump Over Resistance Baseline
The heat pump vs. resistance comparison has one of the best payback profiles of any home electrification upgrade because the baseline (resistance heating) is so inefficient.
| Heat Pump Installed Cost (after 25C credit) | Annual Savings vs. Resistance | Simple Payback |
|---|---|---|
| $4,000 (single zone, net of credit) | $1,100–$1,400/yr (Zone 5) | 2.9–3.6 years |
| $7,000 (multi-zone, net of credit) | $1,100–$1,400/yr | 5.0–6.4 years |
| $10,000 (central, net of credit) | $1,100–$1,400/yr | 7.1–9.1 years |
At high electricity rates ($0.22–$0.28/kWh in New England or California), annual savings widen to $1,500–$1,900/year — compressing payback further.
When Electric Resistance Still Makes Sense
Despite the efficiency disadvantage, electric resistance heating is the right tool in specific situations:
Very small spaces: A 300 sq ft studio apartment or a bathroom floor heating system doesn't justify the cost of a heat pump installation. The low upfront cost of resistance heating wins when the heated space is small enough that annual energy costs are modest in absolute terms.
Spot supplemental heat: Electric resistance is appropriate as a supplemental backup heater for rare extreme-cold events when a heat pump's capacity drops — but should be sized correctly so it doesn't run as the primary source.
Short ownership horizon: If you're renting or selling in fewer than 3 years, the payback math may not work in your favor. Resistance is cheap to install; the operating cost advantage of a heat pump needs years to materialize.
Uninsulated or unconditioned spaces: Heating an uninsulated garage or a poorly air-sealed space is fundamentally inefficient regardless of the heat source. Fix the building envelope first; then the heating system choice matters more.
Heat Pump + Resistance Coexistence
Most forced-air heat pumps include an electric resistance backup strip in the air handler — not to replace the heat pump, but to supplement it during extreme cold when the heat pump's capacity drops. This is standard equipment, not a sign of poor system design.
What matters is the "backup heat lockout" setting. A properly configured system locks out the resistance backup strip above 20–30°F, ensuring the heat pump does the work during the 95% of heating hours where it's significantly more efficient. An improperly configured system can result in the backup strip running unnecessarily, negating much of the efficiency advantage.
Ask your installer to confirm the lockout temperature setting before commissioning is complete.
Use our Heat Pump vs Gas Furnace Calculator to compare operating costs across heating system types including resistance, heat pump, and gas. For whole-home upgrade planning, the Whole-Home Bundle Calculator models heat pump installation alongside other electrification projects.
Bottom Line
Electric resistance heating is the least efficient way to heat a home electrically, and the case for replacing it with a heat pump is strong in almost every climate. The 67% reduction in heating electricity use at COP 3.0 means the operating cost savings are substantial — often paying back the heat pump installation in 3–6 years even before accounting for any federal or state incentives. If you currently heat with resistance (whether baseboard, wall heaters, or electric strips), a heat pump upgrade is one of the highest-ROI electrification projects available.
Related Guides
- Mini-Split vs Central Heat Pump 2026 — Which heat pump system type fits homes currently using resistance heating.
- SEER2 Ratings Explained 2026 — How to read efficiency ratings when comparing heat pump models.
- Heat Pump Sizing Guide 2026 — Proper sizing is critical for replacing resistance heating with a heat pump.
- Ground Source Heat Pump Cost 2026 — When geothermal is worth the premium over air-source heat pumps.
