The FSD36OW is a UL555 Classified Fire Damper and a UL555S Classified Smoke Damper designed for use in “out of the wall or concrete floor” through penetration applications. The FSD36OW Features:
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The FSD36OW (Leakage Class 2), and FSD35OW (Leakage Class 3) combination fire/smoke dampers are designed for vertical or horizontal installation. They can be uninstalled up to 8” (203) outside the fire-rated barrier in HVAC systems with airflow in either direction. They have been tested for the operation to 2,000 fpm and 4″ w.g.
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