The boiler replacement scheme for over 60s offers free boiler grants through ECO4 for pensioners in low-income households with EPC D–G homes, replacing inefficient boilers with A-rated condensing boilers. TrustMark-registered installers like British Gas manage ECO4 grant applications, delivering installations that save £350–£500 yearly and reduce carbon emissions. Eligible seniors on Pension Credit can apply via FreeBoilerGrantsUK.com to secure a new boiler before the 2026 deadline.