DFD-110
Model DFD-110 is for use in walls, floors, and partitions with a fire-resistance rating less than three hours. This model has a 2³/₁₆ inch frame. Dynamic-rated-fire dampers are in HVAC systems that remain operational in the event of a fire. Pressure: Up to 4 in. wg Velocity: Up to 4000 fpm Temperat