Heat Pump Running Cost
Divide heat demand by seasonal performance and apply your electricity price without regional price or climate assumptions.
Heat demand is not electricity use
Heat demand is the useful heat required during a year. The calculator divides it by the seasonal-performance input. A heat demand of 12,000 kWh with a seasonal factor of 4 produces an estimated 3,000 kWh of electricity use.
How to use the calculator
- Select the currency for your electricity-price input.
- Enter annual building heat demand.
- Prefer a seasonal performance factor or measured annual performance over a laboratory COP.
- Enter your electricity price per kWh and calculate consumption plus annual and monthly-average cost.
COP, SCOP, and annual performance
COP describes one test point. SCOP combines standardized operating conditions. A measured annual performance factor compares delivered heat with electricity used across a real year. The seasonal or measured figure is usually more useful for running-cost estimates.
Why actual cost can differ
Hot water, backup resistance heat, pumps, defrost cycles, outdoor temperature, flow temperature, occupancy, and tariff changes can alter consumption. Monthly cost is only annual cost divided by twelve, not a forecast for each month. Purchase cost and payback belong in the related investment calculator.