The Energy Companies Obligation (ECO) is a government scheme which places obligations on larger
energy companies to deliver energy efficiency measures to domestic premises in Great Britain.
Ofgem is responsible for administering ECO on behalf of DECC. Each month energy companies notify
Ofgem of measures installed in the previous month. OFGEM ECO Reports
The three obligations under ECO are:
- Carbon Emissions Reduction Obligation (CERO): solid wall and hard-to-treat cavity wall
insulation alongside secondary measures including other insulation and district heating systems.
- Carbon Saving Community Obligation (CSCO): insulation and district heating measures in
low income and rural areas.
- Home Heating Cost Reduction Obligation (HHCRO): measures that reduce the overall cost
of home heating to low income and vulnerable households, including insulation measures and the repair and replacement of boilers.