Ventilation: Approved Document F, Volume 1 — Dwellings

O N L I N E V E R S I O N 0.16 This approved document gives guidance on window openings for ventilation. In addition, Approved Document B gives guidance on the size of escape windows. The larger of the window openings specified in Approved Document B or Approved Document F should be applied in all cases. Interaction with Part J 0.17 Ventilation fans might cause combustion gases to spill from open-flued appliances. These combustion gases might fill the room instead of going up the flue or chimney, even if the combustion appliance and fan are in separate rooms. 0.18 The guidance in Approved Document J should be followed when installing and testing ventilation appliances. Combustion appliances must operate safely whether or not fans are running. Interaction with Part L 0.19 Energy efficiency should be considered when specifying ventilation systems. Energy efficiency, including the control of infiltration, is dealt with under Part L of the Building Regulations. Interaction with Part K and Part M 0.20 Manual controls, where provided for a ventilation device, should be within reasonable reach of the occupants. Follow the guidance in Approved Documents K and M. Interaction with Part O 0.21 This document sets minimum standards for purge ventilation for rapidly diluting indoor air pollutants and extracting water vapour where necessary in habitable rooms in dwellings. For domestic-type buildings, Part O may require a higher standard than the guidance given in this document for purge ventilation to remove excess heat. In this case, the higher of the two standards should be followed. 4 Approved Document F Volume 1, 2021 edition Building Regulations 2010 O N L I N E V E R S I O N