GATE Architecture

Question

For proper ventilation, the ratio of opening area to the total floor area of the room should be

(A) 1 : 6
(B) 1 :10
(C) 1: 12
(D) 1:20

GATE 2004

Answer: (A) 1 : 6

Standards of ventilation
Cubic space- 3000 cubic feet per person per hour. (range is 300- 3000)
Air change- 2 to 3 times per hour in living room and 4 to 6 times per hour in work rooms and assemblies.

(Note: For volume of room calculation height above 10-12 ft are not taken into account)