Fire Dampers - DFD-350

Model DFD-350 is for use in walls, floors, and partitions with fire-resistance ratings of three hours or more. This model has a 3¹¹/₁₆ inch (94 mm) frame. Dynamic-rated-fire dampers are used with HVAC systems that remain operational during a fire emergency. Pressure: Up to 4 in. wg (1 KPa) Velocity: Up to 4000 fpm (20.3 m/s) Temperature: Up to 286°F (141°C)