18 in 21"H-W 5.75"L Alu Wall Backdraft Dampr, 18-1/2 in x 18-1/2 in, Aluminum
| Item | 21"H-W 5.75"L Alu Wall Backdraft Dampr |
|---|---|
| Shutter Mounting Position | Vertical |
| Shutter Mounting Location | Wall |
| Shutter Construction Material | G-90 Galvanized Steel Frame and Tie Rods |
| 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 | Aluminum |
| Max. Velocity | 2500 FPM |
| Type | Gravity Operated, Single Panel |
| Shutter Item | Backdraft Damper / Wall Shutter |
| Number of Panels | 1 |
| Flange Width | 1-1/2 in |
| Frame Opening B | 18 in |
| For Use With | Vertical Mounted Exhaust Fans |
| Mounting Hole Size | Prepunched |
| Frame Depth | 2-1/2 in |
| Frame Opening A | 18 in |
| Open Depth | 5-3/4 in |
| Shutter Overall Square | 21" x 21" |
| Includes | Prepunched Mounting Holes; Felt edged Counterbalanced Louvers; Weep Holes In Frame Bottom |
| Mounting Position | Vertical |
| Overall Height | 21 in |
| Overall Width | 21 in |
| Overall Length | 5-3/4 in |
| Free Area | 2 sq ft |
| Counterbalanced | Yes |
| Mounting Hole Diameter | 1/4 in |
| Frame Opening Height | 18 in |
| Rough Opening Length | 18-1/2 in |
| Fusible Link Temperature | Not Applicable |
| Switch Action | Normally Closed |
| Frame Material | Galvanized Steel |
| Closure Type | Gravity |
| Overall Diameter | 21 in |
| Rough Opening Diameter | 18-1/2 in |
| Frame Opening Width | 18 in |
| Frame Less Flange | 18 |
| Blade Material Thickness | 26 ga |
| Connection Type | Not Applicable |
| Single Acting/Double Acting | Single Acting |
| Series | 556 |
| For Nominal Duct Diameter | Not Applicable |
| Flange Type | Rear Flange |
| Airflow Direction | Horizontal |
| Tie-Rod Material | Tie Rods, Galvanized Steel Frame |
| Frame Material Thickness | 20 ga |
| Closure Velocity Rating | 2,500 fpm |
| Damper Type | Static |
| Rough Opening Shape | Square |
| Maximum Ambient Temperature | 180 Degrees F |
| Damper Application | Backdraft |
| Blade Seal Material | Felt |
| For Duct Shape | Not Applicable |
| Bushing Material | Stainless Steel |
| Blade Type | Flat Blade |
| Seal Material | Not Applicable |
| Fits Fan Diameter | 18 in |
| ACMA Leakage Class | Not Applicable |
| Opening Type | Gravity |
| Blade Orientation | Parallel Blades |
| Maximum Pressure | 1 in wc |
| Pressure Drop @ 1000 fpm (AMCA 5.2) | Not Applicable |
| Damper Finish | Mill Finish |
| For Fuel Type | Not Applicable |
| Rough Opening Width | 18-1/2 in |
| Maximum Air Velocity | 2,500 fpm |
| Country of Origin (subject to change) | United States |
| Package Quantity | 1 |