S-2.1, r. 13 - Regulation respecting occupational health and safety

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109. Fresh air intake: Subject to section 108, an establishment ventilated mechanically shall be equipped with a fresh air intake system designed to replace the volume of air evacuated from the work environment with fresh air from the atmosphere.
The fresh air intake shall be situated so that no air already evacuated from an establishment is reintroduced.
O.C. 885-2001, s. 109.