Compare a heat pump and gas boiler using the home's heat demand, energy tariffs, system efficiency, installation cost and ownership period.
A boiler must burn more gas than the useful heat delivered because efficiency is below 100%. A heat pump can deliver several units of heat for each unit of electricity, represented by its seasonal coefficient of performance.
Heat loss, radiator sizing, flow temperature, insulation and hot-water demand can affect real performance. A professional heat-loss calculation is more reliable than a generic annual demand estimate.
Enter annual useful heat demand, realistic seasonal efficiency, current tariff rates and net installation costs to compare annual and total costs.
Useful heat demand is divided by boiler efficiency to estimate gas use.
Heat demand is divided by heat-pump COP to estimate electricity use.
Each energy use is multiplied by its unit rate, then running costs are added to installation cost across the chosen period. Standing charges, maintenance and replacement costs are excluded.
Not necessarily. Appliance behaviour, tariff changes, standby use, household habits and billing periods can make the real figure different.
Use a seasonal performance estimate from a suitable property assessment where available. A product's laboratory COP may overstate whole-year performance.
Enter the installation cost after any grant or contribution you reasonably expect to receive.
Home & Bills
Compare heat pumps and gas boilers for installation cost, running cost and suitability.
Read comparisonHeat pumps are highly efficient but depend heavily on the home. Gas boilers are familiar, cheaper to install and work with most existing heating systems. Before switching, check insulation, radiator sizes, hot water storage and total installation cost.
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