Provision of lighting and ventilation

52.

Every building shall be provided with -

(a)

natural lighting by means of glazed windows, skylights, fanlights, doors or other approved natural light- transmitting media;

(b)

natural ventilation by means of windows, skylights, fanlights, doors, louvres or ventilation openings.

Location of sources of natural light and ventilation

53

(1)

In a building the windows and openings through which natural light and ventilation can be obtained shall be so located that-

(a) they face and open upon-

i. the sky;

ii. A public road or a street with right of way or public space dedicated for public use.

iii. a courtyard or open space located within the building lot and complying with the relevant provision, of regulation 38 or 39 as the case may be; or

iv. an air well complying with the requirements of regulation 58; and

(b) in the case of a building other than that specified in sub-paragraph (c), partof the room served by such sources shall be more than 10m away horizontally from such sources; and

(c) in the case of godowns and factories, workshops and ware houses no part of the room served by such sources shall be more than-

i. 12m away horizontally from a source if that source is a window, ventilation opening or other natural ventilation device located in an extenal wall of the room; or

ii. 9 m away vertically from a source, if that source is a ventilation opening or other natural ventilation device in the roof of the room.

Sources of natural light and ventilation may open upon a balcony, verandah or porch

(2)

Sources of natural light and ventilation may open upon an enclosed or partly enclosed balcony, verandah or porch if -

(a)

such balcony, verandah or porch faces upon a street or service road or upon a courtyard or open space which is located upon the building lot and complies with the relevant requirements of regulations 38 and 45;

(b)

the maximum depth of the room served by suchsourcesdoes not exceed 10 m measured from the outer face of the enclosure wall of the balcony, verandah or porch; and

(c)

the front of the balcony, verandah or porch has an opening to external air, the area of which shall be at least 75 per cent of the floor area of such balcony, verandah or porch.