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| Item | Backdraft Exhaust Damper |
| Application | Backdraft |
| Blade Material | Aluminum |
| Blade Material Thickness | 26 ga. |
| Blade Orientation | Parallel Blades |
| Blade Seal Material | Felt |
| Blade Type | Flat Blade |
| Bushing Material | Nylon |
| Closure Type | Gravity |
| Counterbalanced | No |
| Damper Finish | Mill Finish |
| Damper Type | Dynamic |
| Fits Fan Dia. | 12" |
| For Duct Shape | Square |
| For Nominal Duct Diameter | 12" |
| Frame Depth | 2" |
| Frame Material Thickness | 20 ga. |
| Includes | Pre-Punched Conduit Hole Knock-Out |
| Max. Air Velocity | 2000 FPM |
| Max. Velocity | 2000 FPM |
| Opening Type | Motorized |
| Overall Height | 11 3/4" |
| Overall Length | 4 1/2" |
| Overall Width | 11 3/4" |
| Rough Opening Dia. | 12" |
| Rough Opening Length | 12" |
| Rough Opening Shape | Square |
| Rough Opening Width | 12" |
| Single Acting/double Acting | Single Acting |
| Type | Horizontal Or Vertical Mount, No Flange |
| Action | Single Acting |
| Airflow Direction | Horizontal, Vertical |
| Closure Velocity Rating | 2000 FPM |
| Fits Fan Diameter | 12" |
| Flange Type | None |
| Frame Less Flange | #REF! |
| Frame Material | Galvanized Steel |
| Free Area | 0.9 sq. ft. |
| Maximum Air Velocity | 2000 FPM |
| Maximum Ambient Temperature | 180°F |
| Maximum Pressure | 1 in. wc |
| Minimum Ambient Temperature | -40°F |
| Mounting Location | Ceiling, Wall |
| Mounting Position | Horizontal, Vertical |
| Number Of Panels | 1 |
| Rough Opening Diameter | 12" |
| Series | 411 Series |
| Switch Action | Normally Closed |
| Ship weight (kg) | 1.16 |
| Ship height (cm) | 29.85 |
| Ship length (cm) | 11.43 |
| Ship width (cm) | 29.85 |
| HS code | 7308909590 |
| Country of Origin | US |
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