MECHANICAL ROOMS; NEW CONSTRUCTION

Mechanical rooms with equipment using liquefied petroleum gas (LPG) or flammable liquid fuels producing vapors heavier than air must be provided with continuous mechanical outdoor air ventilation that provide a pressure which is equal to or greater than atmospheric, to remove accumulations of gas or vapor at the floor level. A relief or exhaust vent must be located within 12 inches below the ceiling, and a relief or exhaust vent must be located within 12 inches above the floor.