Question

To ask the Secretary of State for Energy and Climate Change, what estimate his Department has made of the average annual saving to a household's energy bill from a (a) condensing gas boiler, (b) cavity wall insulation, (c) loft insulation, (d) solid wall insulation and (e) other forms of insulation.

The saving on energy bills from installing heating and insulation measures will depend on several factors including the particular measure, energy prices and household characteristics that affect their energy consumption.

DECC has estimated that households can save from around £25 to £270 or more per installation per year from installing the main insulation measures. This is based on estimated energy savings from an illustrative three bedroom semi-detached house. Further information on illustrative bill savings for different measures can be found in table 49 of the 2012 Final Green Deal and ECO IA:

https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/42984/5533-final-stage-impact-assessment-for-the-green-deal-a.pdf.