Heat pump
A year’s space-heat demand from floor area and a rough insulation class, then electricity at a chosen SCOP versus gas.
Open a calculatorHeating fuel comparison
Useful heat is the figure you enter. Boiler fuels are divided by calorific value and by boiler efficiency. Resistance heat is 1 kWh in, 1 kWh out. A heat pump divides by SCOP. Default calorific values: gas 10 kWh/m³, pellet 4.8 kWh/kg, coal 7, wood 4, oil 10 kWh/L. Prices are yours. Chimney, delivery and capital cost are not in the running figure.
Annual heat demand for space heating — often 15,000–25,000 kWh for a detached house.
Annual heat demand for space heating — often 15,000–25,000 kWh for a detached house.kWh
Boiler efficiency for gas, oil and solid fuels — a modern boiler is often 0.85–0.92; enter as a fraction (0.9 = 90%).
Boiler efficiency for gas, oil and solid fuels — a modern boiler is often 0.85–0.92; enter as a fraction (0.9 = 90%).Average heat-pump SCOP over the heating season — often 3–4; direct electric heat is effectively 1.
Average heat-pump SCOP over the heating season — often 3–4; direct electric heat is effectively 1.Wood
3,500 zł · 5,000 kg
Coal
4,571 zł · 2,857 kg
Heat pump
4,629 zł · 5,143 kWh
Pellet
5,000 zł · 4,167 kg
Gas
6,400 zł · 2,000 m³
Heating oil
13,000 zł · 2,000 L
Resistance heat
16,200 zł · 18,000 kWh
Wood: 3,500 zł · 5,000 kg
The cheapest row is only the fuel bill at the prices you typed. A leaky house, wet wood or a low SCOP in January can invert the ranking.
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An educational estimate. Not medical, tax or credit advice.