ECO guidance

Here you can access guidance and publications on the ECO scheme.

What our guidance does

It outlines:

  • how we determine which suppliers are obligated
  • how obligated suppliers can meet their obligations
  • when and what suppliers need to report on, and
  • information on ECO measures.

What it doesn’t do

It’s not intended as a definitive guide to the legislative provisions of The Electricity and Gas (Energy Company Obligation) Order 2014 (ECO2 Order).

The documents below apply to all measures installed on or after 1 April 2015. Any measures installed before this date should comply with our previous guidance, which is available in the overview of previous schemes section of our website.

If you’re unable to find the document you are looking for, contact the ECO team who will be happy to help.

Key scheme resources

Guidance Date Published
ECO2 2015-2017 Guidance: Administration 1 Apr 2015
ECO2 2015-2017 Guidance: Delivery 1 Apr 2015

Date Published

Room in roof insulation (RIRI) measures under ECO 1 Sept 2016
ECO2: De-duplication of ECO measures 24 Aug 2016
ECO2 Guidance note: Determining whether premises are domestic premises 27 July 2016
ECO2 Appropriate Guarantees 6 July 2016

ECO2 Cavity wall U-value checklist

29 Apr 2016
ECO2 Consultation on requirements for overwriting U-values 8 Feb 2016
ECO2 Technical Requirements Consultation 30 Oct 2015
ECO2 Monitoring (Measures installed on and after 1 June 2015) 12 Oct 2015
ECO2 Appropriate methodologies 18 Aug 2015
ECO2 Guidance note : Private domestic premises 17 June 2015
ECO2 Guidance note: Loft insulation measures where insulation has recently been removed 16 June 2015
ECO Toolkit 1 Apr 2015
ECO2 Notifying a supplier of a decision to refuse or revoke 16 Sept 2015
ECO2 Notice of receipt of an application for extension 1 Apr 2015
CSV File Format Specification 1 Apr 2015
ECO2 Chartered surveyor recommended measure report 1 Apr 2015
ECO2 Privacy Policy 19 Aug 2015
ECO2 AWG Guidance note 30 Mar 2015
ECO2 District Heating Pre-Conditions (Insulation): Technical Report Template 20 Mar 2015
ECO2 Electric Storage Heater (ESH) Assessment Checklist  20 Mar 2015
ECO2 Boiler Assessment Checklist 20 Mar 2015
ECO2 Technical Monitoring Non-Access Guidance 20 Mar 2015
ECO2 Virgin Loft Insulation Declaration Template 20 Mar 2015
ECO Monitoring (Measures installed from 1 Apr to 31 May 2015) 21 May 2014
Bespoke ECO2 software for calculating savings: features for software development 10 Mar 2015
Home Heating Cost Reduction Obligation (HHCRO): Templates to evidence private domestic premises 2 Mar 2015
ECO2 Measures Table 4 Feb 2015
ECO2.1 Data Dictionary 30 Jan 2015
ECO2 Notification Template 30 Jan 2015
ECO2: Guidance on specific HHCRO requirements 14 Jan 2015

Publications and updates

  • Published: 10th Feb 2017
  • Decisions
  • 2 Associated documents
Ofgem E-Serve response to Energy Company Obligation transition consultation part 1 and updated draft guidance.

  • Published: 2nd Feb 2017
  • Guidance
  • 1 Associated documents
This ECO2t measures table is for ECO2t measures installed on or after 1 April 2017.

  • Published: 2nd Feb 2017
  • Guidance
  • 1 Associated documents
Notification template for ECO2t.

  • Published: 2nd Feb 2017
  • Guidance
  • 1 Associated documents
Data Dictionary for ECO2t.

  • Published: 6th Oct 2016
  • Decisions
  • 4 Associated documents
We have now published the response to our ECO deemed scores consultation

  • Published: 3rd Oct 2016
  • Guidance
  • 1 Associated documents
Our ECO2 cavity wall U-value checklist must be completed for all CWI measures with overwritten U-values

  • Published: 1st Sep 2016
  • Guidance
  • 2 Associated documents
Information on room in roof insulation (RIRI) measures under ECO.

  • Published: 24th Aug 2016
  • Factsheets
  • 1 Associated documents
This note describes the ECO2 de-duplication process.

  • Published: 17th Aug 2016
  • Open letters & correspondence
  • 1 Associated documents
Our response outlines our understanding of the proposed changes and where possible, details how we expect to administer the changes if the proposals become law.

  • Published: 27th Jul 2016
  • Guidance
  • 1 Associated documents
An ECO2 guidance note on determining whether premises are domestic premises.