Table 8: Costs benefit analysis.

MethodCompost heatSolar thermalGround source heat pump
Domestic hot water supplySpatial heatingDomestic hot water supplySpatial heatingDomestic hot water supplySpatial heating

Capital cost (£)11 662418013 4155413
Operating Cost (£ yr-1)1039625940840
Fraction Provided78%91%60%35%50%100%
kWh yr-1 required266711 760266711 760266711 760
Cost per kWh (£)0.49940.09710.39050.22840.62980.0714