Approved Document F: Ventilation — Volume 1 (Dwellings)

Approved Document F: Ventilation — Volume 1 (Dwellings) — Wales Building Regulations statutory guidance covering Mechanical / HVAC approved-document, 2026 edition, published by Welsh Government. Published by the Welsh Government under the Open Government Licence v3.0. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright.