ECO3 Guidance and Associated Documents
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The documents below apply to all ECO3 measures installed between 1 October 2018 and 31 March 2022.
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.
Any measures installed on or after 1 April 2022, should comply with our current ECO4 guidance and associated documents available on our ECO guidance page.
Guidance
Date Published
Energy Company Obligation 2018-22 (ECO3) Guidance: Supplier Administration
31 October 2018
Energy Company Obligation 2018-22 (ECO3) Guidance: Delivery
15 November 2018
Energy Company Obligation (ECO3) Guidance: Innovation
5 February 2019
Publication
Date Published
ECO3 Pre-existing Loft Insulation Declaration
27 September 2018
ECO3 Social housing E, F and G declaration & landlord permission
28 September 2018
ECO3 Private housing FTCH declaration & private rented sector landlord permission
28 September 2018
ECO3 Boiler Assessment Checklist
02 October 2018
ECO3 Electric Storage Heater Checklist
02 October 2018
10 October 2018
ECO3 Child Benefit self-declaration
16 October 2018
19 October 2018
14 November 2018
15 November 2018
30 November 2018
3 December 2018
ECO3 Templates to evidence private domestic premises
3 December 2018
25 January 2019
ECO3 Notice of receipt of an application for extension
31 January 2019
ECO3 Address formatting guidance note
31 January 2019
ECO3 Notifying a supplier of a decision to refuse or revoke approval of a measure
31 January 2019
ECO3 Alternative methodologies
31 January 2019
ECO3 District Heating Pre-Conditions (Insulation): Technical Report Template
28 March 2019
ECO3 District heating systems (DHS) factsheet and summary of proposal (SoP)
29 March 2019
15 May 2019
ECO3 First Time Central Heating Checklist
16 October 2020