Saving per Household (£) Expected Lifetime Total Lifetime Savings Solar Water Heating 106 25 20 £53,000 Ground Source Heat Pump 80 140 20 £224,000 Wind Turbine 17 334 20 £113,560 Biomass 11 1108 15 £16,631 Solar Space 1 56 20 £1,120 Household projects assisted...