Energy Company Obligation (ECO)

Delivering ECO measures amidst COVID-19

Read guidance on how to deliver ECO measures amidst COVID-19. 

Visit our guidance information here

Installers and industry

if you’re interested in delivering energy efficiency measures through the Energy Company Obligation (ECO), you should contact an obligated energy supplier.

The ECO4 guidance, standardised templates, including the Boiler Assessment Checklist and the Electric Storage Heater Checklist are currently being updated for the ECO4 scheme.

What measures can be installed under ECO?

There are a wide range of energy efficiency measures that can be installed under ECO including insulation measures, heating measures and connections to district heating systems (new and upgrades). These include internal and external wall insulation systems.

The ECO4 measure table will be published shortly. This provides information on eligible energy efficiency measures which suppliers can use to meet their ECO obligations.

The list of measures is non-exhaustive. Other measures may qualify, subject to review by us, on a case-by-case basis.


Only obligated suppliers can make an application under one of the innovation routes. If you wish to have an innovation or monitoring proposal supported under ECO you need to work with an obligated supplier who will liaise with and submit the application to Ofgem. Once published more information on ECO4 innovation will be outlined the ECO4 innovation guidance document.

FAQs for installers and industry

Answers to some common questions about the Energy Company Obligation (ECO3) scheme. 

Visit our FAQs section here

Publications and updates