ECO guidance

Here you can access guidance and information on the legislative provisions of the ECO2 Order and how we administer the scheme.

The documents below apply to all measures installed on or after 1 April 2015. Any measures installed prior to this date should comply with our previous guidance.

Guidance Date Published
ECO2 2015-2017 Guidance: Administration 1 April 2015
ECO2 2015-2017 Guidance: Delivery 1 April 2015
Publication Date Published
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 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 April 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 April 2015
CSV File Format Specification 1 April 2015
ECO2 Chartered surveyor recommended measure report 1 April 2015
ECO2 Privacy Policy 19 Aug 2015
ECO2 Appropriate Guarantees 1 April 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
ECO 2: Guidance on specific HHCRO requirements 14 Jan 2015

What our guidance does

It covers the three ECO obligations, outlining:

  • which energy suppliers are obligated under the scheme

  • how they can meet their obligations

  • when and what they 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).

Suppliers are responsible for ensuring that they, and any members of the supply chain acting on their behalf, comply with the applicable requirements of the law.

Need help?

If you have any questions about these documents or on any other area of ECO, please contact us.

Publications and updates

  • Published: 4th Feb 2016
  • Decisions
  • 1 Associated documents
We have now published our response document which summarises the stakeholder’s submissions to our ECO2 Technical Requirements Consultation.

  • Published: 1st Dec 2015
  • Guidance
  • 1 Associated documents
Information on notifying, monitoring and calculating savings for loft insulation measures where pre-existing insulation has recently been removed.

  • Published: 1st Dec 2015
  • Guidance
  • 2 Associated documents
The administration guidance is aimed mainly at suppliers, describing the processes that suppliers and Ofgem follow to meet the requirements of the ECO2 Order.

  • Published: 1st Dec 2015
  • Guidance
  • 2 Associated documents
The delivery guidance is aimed at suppliers and the broader supply chain, describing how to deliver measures that are eligible to contribute towards the ECO targets.

  • Published: 19th Nov 2015
  • Guidance
  • 5 Associated documents
Guidance for suppliers on technical and score monitoring for measures installed under ECO2.

  • Published: 30th Oct 2015
  • Closed: 30th Nov 2015
  • Consultations & responses
  • 19 Associated documents
This consultation seeks views on two aspects of ECO2 scheme delivery: lifetimes for wall insulation measures without an appropriate guarantee, and technical monitoring re-inspection requirements.

  • Published: 19th Oct 2015
  • Guidance
  • 1 Associated documents
Ofgem's ECO Toolkit for installers and other third parties involved in delivering ECO measures. This suite of resources aims to improve understanding of how an ECO measure is processed.

  • Published: 17th Sep 2015
  • Open letters & correspondence
  • 2 Associated documents
This update explains how we have amended the way we let energy suppliers know if we have refused or revoked approval of an energy efficiency measure under the Energy Company Obligation (ECO).

  • Published: 19th Aug 2015
  • Factsheets
  • 1 Associated documents
This document explains how Ofgem will collect, use, and protect personal information that it obtains under the Energy Company Obligation (ECO) scheme.

  • Published: 17th Jun 2015
  • Guidance
  • 1 Associated documents
This document is to help suppliers and the supply chain in providing evidence for private domestic premises. It supports the current ECO Guidance: Delivery.