On-Line Catalog : Fire-Smoke Dampers > 3 Hour Rated > 3V Blade > FSD-343
Model FSD-343 3 hour • UL class 3 — combination fire smoke damper
The FSD-343 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-343 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 with fire resistance ratings up to 4 hours.