Section 14(1) in Tamil Nadu District Municipalities (Hill Stations) Building Rules, 1993
(1)Every room which is intended for human habitation, shall be furnished with sufficient number of windows and ventilators totally providing a ventilation area of not less than one-tenth of the floor area of the room, affording effectual means of ventilation by direct communication with the external air:Provided that every latrine or bath shall be provided with ventilation area of not less than 0.30 square metre.
