Electricity costAppliance energy use and running cost.Loading…
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Compare two heating systems for the same building demand. Enter energy prices, seasonal COP and efficiency yourself so the result is not tied to an outdated tariff.
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area and heat demand
COP or efficiency and price
the second scenario
energy and annual spend
useful heat = floor area × annual heat demandpurchased energy = useful heat ÷ COP or efficiencyannual cost = purchased energy × unit priceWorked example
A 100 m² home needs 80 kWh/m² a year. The heat pump has a seasonal COP of 4 at £1.00/kWh; the gas boiler is 80% efficient at £0.30/kWh.
Use the building energy certificate where possible. A rough estimate carries a large uncertainty.
Use seasonal SCOP rather than a peak COP quoted for one operating point.
Only if you add hot-water demand to the annual energy figure.
Available actions follow the calculator privacy policy. Sensitive inputs are never added to the page URL; an explicitly saved scenario stays local.
No. The calculation runs locally in your browser and is not stored in a database.
Compare heating sources using a common building demand and user-entered prices.
