Ventilation: Approved Document F, Volume 1 — Dwellings

O N L I N E V E R S I O N Section 3: Work on existing dwellings 21 General 21 Installing energy efficiency measures 22 Replacing windows 24 Addition of a habitable room (not including a conservatory) to an existing dwelling 25 Addition of a conservatory to an existing building 26 Addition of a wet room to an existing dwelling 26 Refurbishing a kitchen or bathroom in an existing dwelling 27 Requirement F1(2) and regulations 39, 42 and 44 28 Intention 30 Section 4: Commissioning and providing information 31 Air flow rate testing and commissioning of ventilation systems 31 Inspection standards 31 Air flow rate testing 33 Operating and maintenance instructions 34 Appendix A: Key terms 36 Appendix B: Performance-based ventilation 39 Introduction 39 Performance criteria for dwellings 39 Assumptions used in applying performance criteria for dwellings in Section 1 40 Appendix C: Completion checklist and commissioning sheet 42 Checking design air flow rates against measured air flow rates 42 Demonstrating compliance 42 Part 1 – System details and declarations 43 Part 2a – Installation details 44 Part 2b – Inspection of installation 45 Part 3 – Commissioning details 46 Appendix D: Checklist for ventilation provision in existing dwellings 47 Appendix E: Standards referred to 49 Appendix F: Documents referred to 50 Legislation 50 Other documents 50 vi Approved Document F Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N