On-Line Catalog : Fire-Smoke Dampers > Corridor > 3V Blade > FSD-171
Model FSD-171 1-½ hour • UL class 1 — combination fire smoke damper
tunnel-type corridor ceiling
The FSD-171 combination fire smoke damper employs triple-V blades for point-of-origin control of fire and smoke in static and dynamic smoke management systems. The FSD-171 is qualified to 2,000 ft/min (10.2 m/s) and 4 in.wg. (1.0 kPa) and may be installed in vertical walls or partitions, or horizontally in floors or assemblies with fire resistance ratings up to 2 hours. The FSD-171 may also be installed in horizontal openings of metal stud or wood stud tunnel-type corridor ceilings.