TrustMark Quality Assurance encompasses all work(s) for government funded schemes that require mandated lodgement into the TrustMark Data Warehouse including, but not limited to:

• Energy Company Obligation (ECO)
• Green Home Grant Local Authority Delivery Scheme (GHGLAD)
• Home Upgrade Grant (HUG)
• Social Housing Decarbonisation Fund (SHDF)
• Warm Homes Discount (WHD)

TrustMark uses a variety of methods to conduct the Quality Assurance of measures lodged in the Data Warehouse. These include a blend of onsite and desktop audits. TrustMark works in collaboration with its Scheme Providers through the sharing of data recorded within the Data Warehouse. This data includes but is not limited to:

• Registered Business performance
• Volumes of work lodged across government schemes

These documents are applicable for work installed under the current version of PAS:2035, PAS:2030, Microgeneration Certification Scheme (MCS) standards delivered under associated government schemes where TrustMark is mandated.

In December 2022 TrustMark (on behalf of Retrofit Assessor Scheme providers) publicised Energy Performance Report(EPR) conventions to be applied specifically to ECO4 projects. From stakeholder feedback we have updated the EPR conventions document with amendments agreed by the Retrofit Assessment Working Group, updates include:

• Small text amendments to conventions 2.01 & 5.01 for clarification, there is no change to their application nor their issue date on the 1st February 2023.
• Small updates to the document, including references to the Great British Insulation Scheme and aligning with current terminology.

TrustMark has also published an update to the RdSAP Data Production for Retrofit Projects document, including:

• References to the Great British Insulation Scheme.
• The requirement that the RA creating a post-installation RdSAP assessment (if different to the RA who created the pre-installation assessment) must be a member of the same Retrofit Assessor Scheme

Live from 13/12/22

This document sets out the process by which TrustMark has and will continue to conduct Quality Assurance Monitoring on all funded projects lodged within the TrustMark Data Warehouse.

If you have any questions, please contact your Retrofit Assessor Scheme Provider.

Live from 01/02/23

This document sets out conventions to be applied specifically to EPRs constructed for use in ECO4. Addressing frequently asked questions such as the use of overridden u-values or CWI extraction.

If you have any questions, please contact your Retrofit Assessor Scheme Provider.