Description
Backdraft Damper / Wall Shutter, Front Flange, Fits Fan Dia. 20 in, Shutter Overall Size 23 in x 23 in, Shutter Construction Material Extruded Aluminum Frame and Galvanized Tie Rods, Shutter Opening Required 20-1/2 in x 20-1/2 in, Shutter Free Area 2.281 sq ft, Vertical Shutter Mounting Position, Shutter Mounting Location Wall, Frame Depth 2 1/2 in, Open Depth 5 3/4 in, Flange Width 1 1/2 in, Mounting Hole Size Prepunched, Max. Velocity 2500 FPM, Blade Material Mill Finish Aluminum
Specifications
- Mfr #: 3HHN8
- Item: Backdraft Damper / Wall Shutter, Front Flange
- Shutter Mounting Position: Vertical
- Shutter Mounting Location: Wall
- Shutter Construction Material: Extruded Aluminum Frame and Galvanized Tie Rods
- Shutter Free Area: 2.281 sq ft
- Shutter Opening Required: 20-1/2 in x 20-1/2 in
- Shutter Overall Size: 23 in x 23 in
- Fits Fan Dia.: 20 in
- Blade Material: Mill Finish Aluminum
- Max. Velocity: 2500 FPM
- Mounting Hole Size: Prepunched
- Shutter Overall Square: 23" x 23"
- Flange Width: 1 1/2 in
- Shutter Item: Backdraft Damper / Wall Shutter, Front Flange
- Open Depth: 5 3/4 in
- For Use With: Vertical Mounted Exhaust Fans
- Frame Opening A: 20 in
- Frame Opening B: 20 in
- Number of Panels: 1
- Frame Depth: 2 1/2 in
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