Ventilation: Approved Document F, Volume 1 — Dwellings

F1(2), R39,O RN L4I N2E , VRE R4S I4O N Intention In the Secretary of State’s view, requirement F1(2) and regulation 44 are met if building work that involves installing a mechanical ventilation system, for a new or an existing dwelling, follows the guidance in paragraphs 4.1 to 4.12 to achieve all of the following. a. All fixed mechanical ventilation systems for which testing and adjustment is possible are tested and commissioned. b. Commissioning results show that systems are operating as required to achieve adequate ventilation, including achieving the flow rates specified in this approved document. c. Commissioning results show that controls are operating as required to achieve adequate ventilation. d. The person carrying out the work gives notice to the building control body that commissioning has been carried out following the procedure given in this document. In the Secretary of State’s view, when building work that affects ventilation is carried out, the requirements of regulation 39 are met if the installer provides clear and simple written guidance for the building owner on how to operate and maintain the ventilation system. The written guidance should be as described in the following paragraphs. a. For new dwellings, paragraphs 4.13 to 4.19. b. In existing dwellings, paragraphs 4.13 to 4.17 and 4.20. In the Secretary of State’s view, when a new dwelling is created by building work, the requirements of regulation 42 are met if the installer complies with both of the following. a. Measures and records the mechanical ventilation flow rates by following the guidance in paragraphs 4.9 and 4.10. b. Gives notice of ventilation flow rates to the building control body not later than five days after the final test. 30 Approved Document F Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N