Free Boiler Savings Calculator

Replacing your old inefficient boiler with a free boiler grant could give you savings on your gas bills. Try our savings calculator below to see how much you could save.

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Replacement Boiler Savings Calculator

The calculator uses figures obtained from the Energy Saving Trust and is intended to act as a guide only. Actual savings may differ.


Complete the form by telling us about your:

  • Monthly mains gas bill
  • Monthly boiler service plan (if any)
  • Make and model of your boiler (or age)
  • Additional gas usage

The calculator gives a figure indicative of the savings that could be made by replacing your old inefficient boiler with a new A-rated boiler. It assumes an averge house size, good insulation and current gas prices.

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Apply here for your replacement boiler grant

Grants are available across England, Wales and Scotland. Apply here and you'll be referred to an approved installer in your local area. Despite high demand, we can refer your application to an installer within 24 hours in the majority of cases.

Apply now