In forceVentilation & Overheating
Approved Document F: Ventilation
Indoor air quality and moisture control
Sets minimum ventilation rates for dwellings and non-domestic buildings, covering whole-dwelling ventilation, extract rates and commissioning.
Also known as: AD F, Approved Document F, MVHR, ventilation
Key requirements
- Whole-dwelling supply: at least 0.3 l/s per m² of internal floor area, plus the bedroom-based minimum.
- Minimum whole-dwelling rates run from 19 l/s for one bedroom to 43 l/s for five bedrooms.
- Intermittent extract: kitchen 30 l/s with an external cooker hood (otherwise 60 l/s), utility 30 l/s, bathroom 15 l/s.
- The 2026 edition applies to buildings subject to the 2026 standards from 24 March 2027.
- Commissioning, testing and clear operating information are required.
Performance at a glance
- Whole dwelling
- ≥ 0.3 l/s per m²
- By bedrooms
- 19–43 l/s
- Kitchen extract
- 30 / 60 l/s
- Bathroom extract
- 15 l/s
Applies to
New and altered dwellings and buildings other than dwellings in England.
Rates shown are from the 2022 edition. Use the 2026 edition for work subject to the 2026 standards.
Related records
Reviewed 25 October 2026. This summary is an editorial reference, not legal advice. Check the current official text and confirm the approach with building control before relying on it. Browse all 35 records.