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H-3 Occupancy Class Ventilation

H-3 Occupancy Class Ventilation

H-3 Occupancy Class Ventilation

(OP)
First time here!
So I have a room that is designated as H-3 occupancy. Room size: 50' long x 35 wide x 24'High. I am using 1 CFM per sq. ft. for ventilation rate.
Room has 2 fire rated doors with fuseable links in case of fire. Doors will remain open during occupancy and while the plant is running.
Doors are 12'x12'=144 x 2 = 288 sq. ft. No way to maintain room negative pressure realistically. I am using an 8 ton 100% O/A roof top unit for
supply, room design temp is 85 degrees DBF, and (2) exhaust fans for exhaust. Duct for exhaust will be down low for floor sweep to pick up contaminants which are heavier than air.
Room has fire rated walls and containment floor trench. Can I just forget about the room pressure and just add a little extra exhaust and pull air from
adjoining rooms through roll up doors or does the H-3 room have to be under negative pressure?

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