ECO2t Appropriate and alternative methodologies
Guidance
Publication date
Scheme name
ECO
For each ECO measure a supplier notifies to us, it must provide the associated ECO savings.
Determining ECO savings
Generally, the lifetime carbon and cost savings for ECO1 measures and for ‘SAP scored qualifying actions’ in ECO2/ECO2t are determined by calculating the annual carbon or cost saving in accordance with Standard Assessment Procedure (SAP) or Reduced data Standard Assessment Procedure (RdSAP). ‘SAP scored qualifying actions’ are measures installed from 1 April 2015 to 31 March 2017 or, for DHS measures, to 30 September 2018.
Lifetime carbon and cost savings for ‘deemed score qualifying actions’ are determined using deemed scores. Deemed score qualifying actions are measures installed from 1 April 2017 to 30 September 2018, excluding DHS measures.
Appropriate and alternative methodologies
Where the above methodologies cannot calculate the savings for a particular measure, a supplier can apply to us to use a different methodology.
These methodologies are referred to as ‘appropriate methodologies’ for SAP scored qualifying actions, or ‘alternative methodologies’ for ‘deemed score qualifying actions’ (please see Chapter 6 of the ECO2t guidance: Delivery for more information on appropriate and alternative methodologies).
The tables below detail appropriate and alternative methodologies we have approved. Suppliers wishing to use an approved appropriate or alternative methodology should notify us in writing at eco@ofgem.gov.uk.
ECO2/ECO2t approved appropriate methodologies
The following appropriate methodologies have been approved for ECO2 (including ECO2t). These apply to all SAP scored qualifying actions.
ECO2t approved alternative methodologies
The following appropriate methodologies have been approved for ECO2t. These apply to all deemed score qualifying actions.