- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 05 Apr 2020
Home energy performance ratio
The Home Quality Mark One, Technical Manual SD239, England, Scotland & Wales, published by BRE in 2018 defines the Home energy performance ratio (HEPR) as:
It is a ratio that defines the performance of a HQM assessed home in terms of its:
For each metric, the homes actual performance is compared against the relevant National Building Regulations compliant standard (i.e. a baseline), and the comparison expressed as a percentage improvement.
The percentage improvement for each metric is then compared against a best practice performance level for modelled stock of house types, and then ‘translated’ into a ratio of performance for each metric. These ratios are then weighted for each metric and added together to determine a single overall HEPR.
A description of how to obtain a home’s HEPR is summarised in Methodology on P123 of the Manual. Greater detail of how the HEPR is defined and calculated is provided in the HQM energy guidance document.
 Related articles on Designing Buildings Wiki
Featured articles and news
Results show guarded optimism and payment concerns.
Noteworthy navigable aqueducts.
Technology is making remote work a reality.
Carefully placed structures add drama to pastoral vistas.
Report provides actions required by 2030 to achieve a zero carbon economy.
What type of cool roof is most suitable?
Active Travel programme prioritises cyclists and pedestrians.
CIAT issues caution for use of new standard.
Industry leaders discuss climate change, the economy and other influences.
The building manager is key to operations.
The impact Scotland’s dynamic coast has on the historic environment.
IHBC announces role in new APPG.