Change of https://www.gov.uk/government/publications/home-energy-model-future-homes-standard-assessment-technical-documentation

Change description : 2026-03-24 14:31:00: All technical documents now published to reflect changes in the methodology since the Home Energy Model: Future Homes Standard consultation. For further details see the government response to the consultation. [Guidance and regulation]

Showing diff : 2023-12-13 11:24:22.160014629 +00:00..2026-03-24 14:31:54.244428138 +00:00

Guidance

Home Energy Model: Future Homes Standard assessment: technical documentation

Technical documents providing detail on the Home Energy Model: Future Homes Standard Assessment methodology.

From:
Department for Energy Security and Net Zero
Published
13 December 2023
Last updated
24 March 2026 — See all updates

Documents

HEMFHS-TP-01: Summary of the FHS occupancyassessment assumptionswrapper for the Home Energy Model

PDF, 2.08528 MBKB, 2114 pages

HEMFHS-TP-02: FHSOccupancy spaceassumptions heatingin andthe coolingHome demandEnergy assumptionsModel

PDF, 1901.63 KBMB, 1329 pages

HEMFHS-TP-03: FHSSpace domesticheating hotand watercooling assumptions in the Home Energy Model

PDF, 613337 KB, 3015 pages

HEMFHS-TP-04: FHSHot applianceswater usage assumptions in the Home Energy Model

PDF, 601826 KB, 2335 pages

HEMFHS-TP-05: FHSLighting, fuelcooking, factorselectrical appliances, and incidental heat losses in the Home Energy Model

PDF, 3671 MB, 41 pages

HEMFHS-TP-06: Modelling ventilation and infiltration within the Home Energy Model

PDF, 300 KB, 2012 pages

HEMFHS-TP-07: Calculating cold water and evaporative losses within the Home Energy Model

PDF, 566 KB, 17 pages

HEMFHS-TP-06:HEMFHS-TP-08: SummaryModelling ofcurtains wrappersand forblinds within the FHSHome assessmentEnergy Model

PDF, 166324 KB, 9 pages

HEMFHS-TP-09: Fuel factors within the Home Energy Model

PDF, 411 KB, 19 pages

HEMFHS-TP-10: Standardised weather data for the FHS wrapper

PDF, 675 KB, 18 pages

Details

We will update and add to this technical documentation throughout the model development process.

These technical documents have been published alongside:

Updates to this page

Published 13 December 2023
Last updated 24 March 2026 href="#full-history">+ show all updates

  1. All technical documents now published to reflect changes in the methodology since the Home Energy Model: Future Homes Standard consultation. For further details see the government response to the consultation.

  2. First published.

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Update history

2026-03-24 14:31
All technical documents now published to reflect changes in the methodology since the Home Energy Model: Future Homes Standard consultation. For further details see the government response to the consultation.

2023-12-13 11:23
First published.