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:
|
A metric that is unique to the HQM that is calculated by the HQM energy engine using modelled outputs from approved building energy calculation software, against which HEPR credits are awarded. 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. |
[edit] Related articles on Designing Buildings Wiki
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
The importance of early engagement
Construction lessons from the Trillium HealthWorks Experience Centre.
Mayors are to be given planning call in powers
Mayors across England will be able to make the most important planning decisions.
The Master Builder: William Butterfield and his times. Book review.
Why construction can't afford to ignore the skills gap.
Building Safety Regulator, 19 August
Gill Kernick appointed Independent Chair of Residents’ Panel.
Connecting knowledge, technology and conservation
Building competence for the future of built heritage.
Building Regulations and Building Safety Act
CIOB publishes free advice for non-domestic clients.
Building Safety Newsletter from MHCLG.
An extraordinary record of steel engineering worldwide.
Households living near new pylons to save on bills.
ECA warns growth must not outpace grid capacity or skills.
The role of the client and decision making
CIOB response to built environment professions call for evidence.