*£390 savings a year figure is for a 1940s 3 bed semi-detached home with a ten year old gas boiler and a gas price of 3.73p/kWh, when cavity wall insulation and loft insulation are installed. More modern homes save less. Individual savings depend on a large number of factors and the £390 quoted should be treated as a guide.
†Based on installing a new A-rated condensing boiler and full set of heating controls in a gas-heated, semi-detached gas heated home with three bedrooms.
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