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This 28-inch backdraft damper is designed for contractors and facility teams installing horizontal exhaust ventilation. It mounts in roof curbs, ductwork, or wall collars to support fan and powered roof ventilator exhaust setups.
The non-flanged damper has a galvanized steel frame and aluminum blades. Felt seals on the blade leading edges support quieter closing and added weather protection, while spring assistance helps the blades open quickly. It measures 28 inches wide by 28 inches high by 3 inches deep and is intended for horizontal-mount exhaust applications.
Key Features:
Choose this 28-inch damper for horizontal exhaust installations requiring a non-flanged component for roof curbs, ductwork, or wall collars.
| Country of Origin: | US |
| Material: | Aluminum/Galvanized Steel |
| Product Depth: | 3" |
| Product Height: | 28" |
| Product Type: | Dampers |
| Product Width: | 28" |
| Quantity Included: | 1 |
| Shipping Weight: | 7.5 lbs |
| Manufacturer Part Number: | 411-STD 28 |
| Width: | 27-3/4 in |
| Depth: | 2 in |
| Height: | 27-3/4 in |
| Weight: | 8 lbs |
| Diameter: | 28 in |
| Free Area: | 4.58 ft³ |
| Max Pressure In W.G.: | 1 in |
| Max Velocity: | 2000 ft/min |
| Rough Opening: | 28 x 28 in |
| Brand: | Air Conditioning Products |
| For Use With: | Power Roof Ventilators |
| Manufacturers Part Number: | 411-STD 28 |
| Mounting Location: | Horizontal |
| Number of Panels: | 1 |
| Type: | Backdraft |
| Warranty: | 1 yr |
| Width: | 3.00 in |
| Height: | 28.00 in |
| Depth: | 28.00 in |
No additional information available.
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