Heat Pump COP & Running Cost Calculator
Compare air source heat pump running costs against a gas boiler for UK homes.
kWh/yr
Typical UK semi-detached: 10,000–15,000 kWh/yr heating.
COP
Air source typical: 2.5–3.5 COP (seasonal average SCOP).
p/kWh
p/kWh
%
Annual Cost Comparison
Formulas
- Heat pump electricity used = Heating demand / COP
- Heat pump annual cost = Electricity used × tariff
- Gas used = Heating demand / boiler efficiency
- Gas annual cost = Gas used × gas tariff
- Annual saving = Gas cost − Heat pump cost