The Ontario Building Code | Group B Sleeping Rooms
220.127.116.11. Group B Sleeping Rooms
(1) openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings provided for access between an interconnected floor space and a building or a portion of abuilding containing Group B major occupancy sleeping rooms shall be provided with vestibules that are provided with a mechanical air supply and that are designed,
(a) to restrict the passage of smoke from the interconnected floor space into the area containing sleeping rooms in accordance with the limits described in Sentence 18.104.22.168.(1), and
(b) in conformance with Clause 22.214.171.124.(3)(a).