Compare the same heat delivered
Electric resistance baseboards convert electrical energy into room heat. A heat pump transfers heat and can deliver more thermal energy than the electricity it consumes. ENERGY STAR explains this distinction for ductless heat pumps. The size of the electricity reduction in your home depends on the heat pump’s actual efficiency and how much baseboard heating it displaces.
Do not apply a brochure savings percentage to your entire electricity bill. Water heating, cooking, lighting, and other loads are not automatically reduced when space-heating equipment changes.
A useful equal-output example
Assume an illustrative month requiring 3,000 kWh of useful space heat and electricity at $0.18/kWh. Ignoring minor ancillary differences, resistance heating requires about 3,000 kWh of electricity. A heat pump supplying all that heat at an average COP of 3 requires about 1,000 kWh.
| Scenario | Electrical use | Cost at assumed rate |
|---|---|---|
| Resistance supplies all heat | 3,000 kWh | $540 |
| Heat pump supplies all heat at COP 2 | 1,500 kWh | $270 |
| Heat pump supplies all heat at COP 3 | 1,000 kWh | $180 |
| Heat pump supplies 70% at COP 3; baseboard supplies 30% | 1,600 kWh | $288 |
The final row matters in partial conversions. Heat pump electricity is 2,100 ÷ 3 = 700 kWh, while baseboards use 900 kWh. Total use is 1,600 kWh, a $252 reduction from the all-baseboard example. These are mathematical scenarios, not measured savings or a prediction for a particular installation. EIA’s glossary defines the energy unit used here.
Coverage is the practical constraint
An indoor head in an open living area may displace substantial baseboard use there. Closed bedrooms and other separated rooms still need a designed heating path. Before removing existing heaters, have the contractor identify each room’s heat source at the winter design condition.
The decision is not necessarily “remove every baseboard” or “leave everything unchanged.” A phased project can deliberately retain some resistance heat. What matters is making its role explicit and including its expected consumption in the model. PNNL’s research on ductless retrofits investigates controls and system configurations; it does not establish one universal savings result for all homes.
Coordinate the controls
If baseboards and a heat pump serve the same space, ask the installer for a control plan. Similar thermostat setpoints can lead to more baseboard use than the homeowner expected, depending on thermostat location and operation. Do not disable essential room heat without verifying that the heat pump covers the load.
At handover, record normal settings, the purpose of retained heaters, and what to do during an equipment fault. Keep comfort and freeze protection in the plan. A savings experiment should not leave vulnerable occupants or plumbing exposed to unsafe temperatures.
Evaluate the investment
Use actual installed quotes and a full-year estimate. A hypothetical $9,000 project saving $900 per year has a ten-year simple payback. At $1,500 annual savings, it is six years. Those figures exclude maintenance differences, financing, future repairs, and the time value of money. They are examples of the calculation, not typical project prices.
Account separately for cooling. If you previously used window AC, there may be displaced cooling consumption and avoided equipment replacement. If you previously had no cooling, the heat pump adds a valuable service but may also add summer electricity use. Calling that new cooling use a heating-efficiency failure would be misleading.
Ask for the missing evidence
Before signing, request room coverage, low-temperature output, electrical scope, condensate routing, and commissioning details. Ask how the proposed system performs with doors in their normal positions. Compare ducted and ductless layouts and mini-split installation scope to understand alternatives.
The strongest case for replacement combines a credible share of heating displaced, realistic COP assumptions, and an installed price you can afford. Use the heating-cost calculator to explore heat pump electricity, then add any retained baseboard consumption explicitly.