Heat pump running cost calculator
Enter how much heat your home needs, the heat pump's efficiency and your electricity and gas prices. The calculator shows the yearly cost of each.
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How the cost is worked out
Heat pump cost = heat demand ÷ SCOP × electricity price. Gas boiler cost = heat demand ÷ boiler efficiency × gas price. The difference is your yearly saving or extra cost.
Typical values
- Heat demand: 6,000 to 20,000 kWh a year, depending on the size and insulation of the home.
- SCOP: 2.5 to 4 for air source heat pumps, higher for ground source.
- Boiler efficiency: 80% to 92%.
Sources and further reading
Questions people ask
Where do I find my heat demand?
On your gas bill (total kWh used, less cooking and hot water if known) or in your energy performance certificate.
Results are estimates for information only, not financial advice. Read the full disclaimer.
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