– FD and MFSD are prohibited since the generator operation depends on the ventilation airflow to operate without overheating. . Fire dampers are installed in ducts passing through or in air outlet openings terminating at shaft walls, fire barriers (such as an occupancy separation wall, horizontal exit walls, corridor walls, corridor ceilings, floor-ceiling assemblies) and other fire resistance–rated assemblies as required. . Fresh Air Supply: The ventilation system must provide adequate air supply to ensure smooth generator startup. This is critical for both combustion and cooling purposes. Fire- and smoke-rated construction is used to “compartmentalize” a building into fire & smoke zones to prevent the spread of fire and smoke. I have a good idea of the airflow required, and selected my fans appropriately.
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