5706.4.4 Ventilation.
FC § 5706.4.4
Ventilation shall be provided for rooms, enclosures and other areas in buildings or structures in which Class I liquids are handled or used, including any pumping or transfer. Ventilation systems shall be designed in a manner that takes into consideration the relatively high specific gravity of the vapors. When natural ventilation is approved, adequate openings in outside walls at floor level, unobstructed except by louvers or coarse screens, shall be provided. When natural ventilation is not approved, mechanical ventilation shall be provided in accordance with the construction codes, including the Mechanical Code.













