Purge ventilation
Approved Document O: Overheating, published by HM Government in 2021, defines purge ventilation as: ‘Ventilation of rooms or spaces at a relatively high rate to rapidly dilute pollutants and/or disperse water vapour.’
Part O 2021 (England), Technical Guidance, July 2022 – Final Draft, published on the Future Homes Hub, defines Purge Ventilation as: ‘usually defined as ventilation provision intended for the rapid dilution of indoor pollutants such as burnt toast or a steamy shower. Part F states requirements for purge ventilation. Higher ventilation rates may be required to meet overheating mitigation under Part O.’
Approved Document F Volume 1, 2021 edition, defines purge ventilation as: ‘Manually controlled ventilation of rooms or spaces at a relatively high rate to rapidly dilute pollutants and/or disperse water vapour. Purge ventilation may be provided by natural means (e.g. an openable window) or mechanical means (e.g. a fan).’
[edit] Related articles on Designing Buildings
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Government approach could undermine delivery and regeneration.
World's first mass timber data centre.
The overlooked environmental aspect of data centre development.
Introduction to radon awareness
New technical information sheet published by CIOB.
Updated supplier guide can help electrical contractors engage with NHP.
CIAT confirm the winners of the 2026 architectural technology awards.
Government launches a one stop shop for flood preparedness.
Sir Edwin Lutyens: Britain's greatest architect? Book review.
CIOB publishes free template to help assess and manage risks.
ECA's reflections on Party Conference season
Burnham wants to be confident of winning before asking for a fresh mandate.
New Chief Construction and Scientific Adviser
Sergio Cavalaro, Professor of Infrastructure Systems at Loughborough University.
Building safety levy for England
CIAT publish estimator tool for members.
Water sector faces a growing crisis that could slow the delivery of vital infrastructure.