Instead, the government will motivate men and women to replace their boilers with greener choices, specifically heat pumps and biomass boilers. The overall funding pool available for the ECO4 scheme is £4 billion, and the quantity of funding for individuals will vary based upon numerous components (see even further information https://governmentgrantshomeinsulation.blogspot.com/2025/07/boiler-upgrade-scheme-cavity-wall.html