The ECO4 Scheme is a UK government initiative aimed at improving home energy efficiency, reducing emissions, and lowering energy bills. It targets low-income households and those with low Energy Performance Certificate (EPC) ratings (D, E, F, or G) by providing free energy-saving measures such as insulation, heating upgrades, and renewable energy installations like solar panels and heat pumps[1][2]. The scheme is not a grant but an obligation on energy companies to fund these improvements, running from April 2022 to March 2026[3][4]. Eligibility is based on receiving certain income-related benefits