8. Ventilation requirements
(1) Except where mechanical ventilation complying with the requirements of these regulations is provided, every water closet apartment within a building, not being an apartment to which regulation 6(2) applies, shall comply with the following conditions: ¾
One of its sides shall be an external wall of the building, abutting onto a street or lane or on an open space within the property, having a width of not less than 1.2 metres and an area of not less than the following ¾
For first storey above floor level of open space ¾ 3.3 square metres.
For second storey above floor level of open space ¾ 6.6 square metres.
For all other storeys above floor level of open space ¾ 9.3 square metres.
(2) Each water closet apartment shall be provided with a window in the external wall, having a clear light area of not less than 0.2 square metre per closet pan.
(3) Each water closet apartment shall be provided with direct ventilation to the open air from a point near the ceiling level through a vent or vents, carried as direct to the open air as is practicable and boxed throughout, and having a minimum clear area at any point of not less than 0.015 square metre per closet pan.
[Regulation 8 errata in Gazette 27 Aug 1971 p. 3148; amended in Gazette 16 Nov 1973 p. 4222; 3 May 1974 p. 1439.]