FSD36OW 1-1/2 hr V-Groove Blade, Out of Wall/Floor Combination Fire/Smoke Damper
The FSD36OW is a UL555 Classified Fire Damper and a UL555S Classified Smoke Damper designed for use in "out of wall or concrete floor" through penetration applications. The FSD36OW Features:
Triple Vee Groove Blades
UL555S Leakage Class II
1 ½ Hour UL555
Factory Provided for use "out of wall" or "out of concrete floor"