Air source heat pumps: how the costs and savings stack up

The lowdown as householders are being urged to replace their old boilers with greener alternatives

• It's been brilliant': air source heat pump will recoup cost for owner

Householders are being encouraged to ditch their old gas and oil-fired boilers and replace them with new clean, green heat pumps.

In the run-up to the Cop26 climate summit, the UK government has set out plans to offer grants to help households install air source heat pumps and other low-carbon heating systems over the next three years.