Energy savings tool
See what the Energy Saving Trust estimates each energy efficiency improvement saves a year for your type of home, and which government grants may help pay for it.
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Source: Energy Saving Trust advice pages on cavity wall insulation, loft insulation, boilers, windows and air source heat pumps, read 26 October 2026. England, Scotland and Wales figures for a gas-heated home, at fuel prices as of July 2026.
Complete the form to see your potential savings
The savings are the Energy Saving Trust's estimates for a typical gas-heated home of each type in England, Scotland and Wales; they are not a survey of your home, and Northern Ireland's figures differ. Actual savings depend on your home, how you use energy and how well the work is done. Grant schemes differ across England, Scotland, Wales and Northern Ireland, and this calculator does not ask where you live, so check the nation named against each scheme. Nothing here decides eligibility: that rests with your local council, your energy supplier or the scheme administrator.
Get a quote from a certified installer, or check which grants your property may qualify for.