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 and news
Level 6 Design, Construction and Management BSc
CIOB launches first-ever degree programme to develop the next generation of construction leaders.
Open for business as of April, with its 2026 prospectus and new pipeline of housing schemes.
The operational value of workforce health
Keeping projects moving. ECA on better incorporation of unplanned absence and the importance of health in operations.
A carbon case for indigenous slate
UK slate can offer clear embodied carbon advantages.
Costs and insolvencies mount for SMEs, despite growth
Construction sector under insolvency and wage bill pressure in part linked to National Insurance, says report.
The place for vitrified clay pipes in modern infrastructure
Why vitrified clay pipes are reclaiming their role in built projects.
Research by construction PR consultancy LMC published.
Roles and responsibilities of domestic clients
ACA Safety in Construction guide for domestic clients.
Fire door compliance in UK commercial buildings
Architect and manufacturer gives their low down.
Plumbing and heating for sustainability in new properties
Technical Engineer runs through changes in regulations, innovations in materials, and product systems.
Awareness of the Carbon Border Adjustment Mechanism
What CBAM is and what to do about it.
The new towns and strategic environmental assessments
12 locations of the New Towns Taskforce reduced to 7 within the new towns draft programme and open consultation.
Buildings that changed the future of architecture. Book review.
The Sustainability Pathfinder© Handbook
Built environment agency launches free Pathfinder© tool to help businesses progress sustainability strategies.
Government outcome to the late payment consultation, ECA reacts.
IHBC 2025 Gus Astley Student Award winners
Work on the role of hewing in UK historic conservation a win for Jack Parker of Oxford Brookes University.