condition: new make / manufacturer: Greenheck size / dimensions: 23 3/4x20
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Model DFDAF-330 is a multi-blade dynamic-rated-fire damper with airfoil style blades for use in walls, floors, and partitions with fire-resistance ratings of three hours or more. Dynamic-rated-fire dampers are used with a HVAC systems that remain operational during a fire emergency.
Pressure: Up to 8 in. wg
Velocity: Up to 4000 fpm
Temperatures: Up to 350°F
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