Home Energy Model: technical documentation
Technical documents providing detail on how a home’s energy performance is calculated using the Home Energy Model (HEM).
Documents
Details
329 MarchOctober 20262025
AllWe technicalhave documentsrepublished havesome nowof beenthe republishedtechnical documents to reflect changes in the methodology since the Home Energy Model consultation. For further details see the government response to the consultation.
The consultation on the proposed Home Energy Model closed in March 2024 and we published the summary of responses and the government response to it in October 2025.
We will update and add to this technical documentation throughout the model development process.
Updates to this page
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All technical documents have now been republished to reflect changes in the methodology since the Home Energy Model consultation.
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We have republished some of the technical documents to reflect changes in the methodology since the Home Energy Model consultation. For further details see the government response to the consultation (linked in page).
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First published.