5004.3.1 System requirements.
FC § 5004.3.1
Exhaust ventilation systems shall comply with the following requirements: 1. Installation shall be in accordance with the Mechanical Code.
2.Mechanical ventilation shall be at a rate of not less than 1 cubic foot per minute per square foot (0.00508 m3/s/m2) of floor area over the storage area.
3.Systems shall operate continuously unless alternative designs are approved.
4.A manual shutoff control shall be provided outside of the room in a position adjacent to the access door to the room or in an approved location. The switch shall be a break-glass or other approved type and shall be labeled: VENTILATION SYSTEM EMERGENCY SHUTOFF.
5.Exhaust ventilation shall be designed based on the density of the potential fumes or vapors released. For fumes or vapors that are heavier than air, exhaust shall be taken from a point within 12 inches (305 mm) of the floor. For fumes or vapors that are lighter than air, exhaust shall be taken from a point within 12 inches (305 mm) of the highest point of the room.
6.The design and location of exhaust and inlet air openings shall serve to provide air movement across all portions of the floor and room to prevent the accumulation of vapors.
