The Ontario Building Code | Make-up Air

6.2.4.12. Make-up Air

(1) In ventilating systems that exhaust air to the outdoorref ="http://thehandyforce.com/doors/" title ="Toronto Door installer">doors, provision shall be made for the admission of a supply of make-up air in sufficient quantity so that the operation of the exhaust system and other exhaust equipment or combustion equipment is not adversely affected.