- Country of Origin:
- United States
- Item:
- 21H-W 6.5"L Fiberglass Backdraft Damper"
- Shutter Mounting Position:
- Vertical
- Shutter Mounting Location:
- Wall
- Shutter Construction Material:
- Fiberglass Frame and Stainless Steel Tie Rod
- Shutter Free Area:
- 2.043 sq ft
- Shutter Opening Required:
- 18-1/2 in x 18-1/2 in
- Shutter Overall Size:
- 21 in x 21 in
- Fits Fan Dia.:
- 18 in
- Blade Material:
- Fiberglass
- Max. Velocity:
- 2500 FPM
- Frame Depth:
- 3 in
- Frame Opening B:
- 18 in
- Shutter Item:
- Backdraft Damper / Wall Shutter
- Flange Width:
- 1 1/2 in
- Number of Panels:
- 1
- Frame Opening A:
- 18 in
- Open Depth:
- 6 1/4 in
- For Use With:
- Vertical Mounted Exhaust Fans
- Mounting Hole Size:
- Prepunched
- Shutter Overall Square:
- 21 x 21""
- Includes:
- Corrosion Resistant Fiberglass Frame and Louvers with Stainless Steel Hardware
- Mounting Position:
- Vertical
- Overall Length:
- 6 1/2 in
- Overall Width:
- 21 in
- Color:
- Beige
- Overall Height:
- 21 in
- Free Area:
- 1.8 sq ft
- Flange Type:
- Rear Flange
- Bushing Material:
- Stainless Steel
- Blade Orientation:
- Parallel Blades
- Frame Material Thickness:
- 0.1 in
- Frame Less Flange:
- 18
- Blade Type:
- Flat Blade
- Rough Opening Diameter:
- 18 1/2 in
- Closure Velocity Rating:
- 2,500 fpm
- Damper Application:
- Backdraft
- Opening Type:
- Gravity
- Series:
- FGS
- Rough Opening Width:
- 18.5 in
- Counterbalanced:
- No
- Tie-Rod Material:
- Stainless Steel Frame and Tie Rods
- Mounting Hole Diameter:
- 1/4 in
- Rough Opening Shape:
- Square
- Maximum Ambient Temperature:
- 180 Degrees F
- Frame Opening Width:
- 18 1/2 in
- Switch Action:
- Normally Closed
- For Nominal Duct Diameter:
- Not Applicable
- Airflow Direction:
- Horizontal
- Fits Fan Diameter:
- 18 in
- Damper Type:
- Static
- For Fuel Type:
- Not Applicable
- Fusible Link Temperature:
- Not Applicable
- Overall Diameter:
- 21 in
- Closure Type:
- Gravity
- Frame Material:
- Fiberglass
- Blade Seal Material:
- Not Applicable
- Frame Opening Height:
- 18 1/2 in
- Maximum Pressure:
- 1 in wc
- Maximum Air Velocity:
- 2500 fpm
- Rough Opening Length:
- 18 1/2 in
- Single Acting/Double Acting:
- Single Acting
- Pressure Drop @ 1000 fpm (AMCA 5.2):
- Not Applicable
- For Duct Shape:
- Not Applicable
- ACMA Leakage Class:
- Not Applicable
- Connection Type:
- Not Applicable
- Seal Material:
- Not Applicable
- Package Quantity:
- 1