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BC § 910.4.3.1
No portion of the makeup air openings shall be higher than 6 feet (1828.8 mm) above the floor level. Operation of makeup air openings shall be manual or, if properly coordinated with the smoke removal system, automatic. The minimum gross area of makeup air inlets shall be 8 square feet per 1,000 cubic feet per minute (0.74 m 2 per 0.4719 m 3 /s) of smoke exhaust.
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