Heat Pump Water Heater Savings Calculator 2026
Calculate annual savings from a heat pump water heater vs electric resistance in 2026. Includes 30% IRA tax credit and payback period.
How to use this calculator
- Enter your current water heater type (electric resistance, natural gas, or propane).
- Enter your household size — this determines estimated hot water usage.
- Enter your electricity rate in $/kWh (check your utility bill).
- If replacing gas, enter your current gas price per therm.
- Annual savings, payback period and 10-year ROI appear instantly.
Understanding your results
Heat pump water heaters (HPWH) work by moving heat from the surrounding air into the water, rather than generating heat directly. This makes them 2–3× more efficient than standard electric resistance heaters — for every 1 unit of electricity used, they deliver 2–3 units of heat.
Coefficient of Performance (COP) measures efficiency. A standard electric resistance heater has a COP of 1.0. A heat pump water heater has a COP of 2.0–3.5 depending on ambient temperature. At COP 2.5, you pay for 40% of the energy of a standard electric heater to get the same amount of hot water.
IRA 2026 tax credit: The Inflation Reduction Act provides a 30% federal tax credit (up to $2,000) for qualifying heat pump water heaters installed in 2026. This significantly reduces the $800–$1,500 price premium over standard electric water heaters.
Space requirements: HPWHs require 700–1,000 cubic feet of surrounding air space to operate efficiently and produce some noise (similar to a dehumidifier). They also slightly cool and dehumidify the surrounding space, which can be a benefit in summer but a minor heating cost in winter.
Frequently asked questions
Direct answers for US homeowners.
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