Application

The FSD-351 combination fire smoke damper employs airfoil blades for point-of-origin control of fire and smoke in static and dynamic smoke management systems. The FSD-351 is qualified to 4,000 ft/min (20.3 m/s) and 8 in.wg. (2.0 kPa) and may be installed horizontally in floors or assemblies with fire resistance ratings up to 4 hours.