Ventilation: Approved Document F, Volume 1 — Dwellings

O N L I N E V E R S I O N F1(1) Section 3: Work on existing dwellings General 3.1 When building work in an existing dwelling includes work on ventilation, for example: a. adding a habitable room b. adding a wet room c. replacing part of the ventilation system, including extract fans the work should meet the relevant standards in this approved document. 3.2 When other building work is carried out that will affect the ventilation of the existing dwelling, for example: a. replacing a window or door b. doing energy efficiency work the ventilation of the dwelling should either: a. meet the standards in the relevant approved document b. not be less satisfactory than before the work was carried out. NOTE: Ventilation through infiltration should be considered to be part of the ventilation provision of a dwelling. Reducing infiltration might reduce the indoor air quality of the dwelling below the standards given in Appendix B. 3.3 For common types of work, the requirements of paragraphs 3.1 and 3.2 may be demonstrated by following the guidance detailed below. a. For installing energy efficiency measures excluding window replacement, paragraphs 3.6 to 3.13. b. For installing energy efficiency measures including window replacement, paragraphs 3.6 to 3.13 and 3.14 to 3.16. c. For replacing windows only, paragraphs 3.14 to 3.16. d. For the addition of a habitable room, paragraphs 3.17 to 3.20. e. For the addition of a conservatory, paragraphs 3.21 to 3.24. f. For the addition of a wet room, paragraphs 3.25 to 3.29. g. For refurbishing a kitchen or bathroom, paragraphs 3.30 to 3.32. h. For work done to improve the ventilation of the dwelling that was not triggered by the building work in (a) to (g), Section 1 should be followed. 3.4 Other ventilation solutions than those detailed here may be used, as long as it can be demonstrated to a building control body that they comply with the requirements of paragraphs 3.1 and 3.2. 21 Building Regulations 2010 Approved Document F Volume 1, 2021 edition O N L I N E V E R S I O N