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Ventilation of internal habitable rooms through another habitable room
2.111NI-wide·Technical Booklet K Ventilation
A habitable room not containing openable windows may be ventilated through another habitable room (see Diagram 2.3) where – (a) there is, from the habitable rooms to outside, provision for both – (i)
ventilationdwellingaccessExample C5: Background ventilators and intermittent extract fans
Example C5NI-wide·Technical Booklet K Ventilation
For a two storey semi-detached house of 84 m2 floor area, paragraph 2.19 shows that the equivalent background ventilator area is 40000 mm2. To maximise the air flow through the dwelling by encouraging
dwellingventilationaccess