Research and analysis

Green Homes Grant (GHG) SMETER project evaluation

This report evaluates heat loss changes in retrofitted homes using smart meter data, and compares SMETER vs EPC model estimated energy savings.

• From: Department for Energy Security and Net Zero
• Published: 4 September 2025

Documents

Green Homes Grant (GHG) SMETER project: summary

PDF, 362 KB, 10 pages

Green Homes Grant (GHG) SMETER project: report

PDF, 2.68 MB, 96 pages

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Details

This report summarises the findings of the Green Homes Grant (GHG) Smart Meter Enabled Thermal Efficiency Rating (SMETER) project, which assessed how home energy efficiency changed after retrofits funded through the Green Homes Grant scheme. It used smart meter data to estimate changes in heat loss from homes and compared these results with modelled estimates based on EPC data.

The report evaluates the reliability of different SMETER methods and provides insights into their suitability for large-scale retrofit evaluation. It also outlines the limitations of current approaches and offers recommendations for future use of smart meter data in assessing home energy performance.

Published 4 September 2025