FSD35OW 1-1/2 hr V-Groove Blade, Out of Wall/Floor Combination Fire/Smoke Damper
The FSD35OW is a 1 1/2 hour UL555 Classified Fire Damper and a UL555S Classified Smoke Damper designed for use in "out of wall or concrete floor" through penetration applications. The FSD35OW Features:
Triple Vee Groove Blades
Rated for 2,000 fpm and 4" w.g.
UL555S Leakage Class III
1 ½ Hour UL555
Factory Provided for use "out of wall" or "out of concrete floor"