8-inch horizontal-mount backdraft damper with galvanized steel frame and aluminum blades

8-Inch Horizontal-Mount Backdraft Damper

SKU:
WBB771625
Model/MPN:
411-STD 8
Our Price:
$40.94
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Product Specifications:
Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 8"
Product Height: 2.5"
Product Type: Dampers
Product Width: 8"
Quantity Included: 1
Manufacturer Part Number: 411-STD 8
Width: 7-3/4 in
Depth: 2 in
Height: 7-3/4 in
Weight: 2 lbs
Diameter: 8 in
Free Area: 0.31 ft³
Max Pressure In W.G.: 1 in
Max Velocity: 2000 ft/min
Rough Opening: 8 x 8 in
Brand: Air Conditioning Products
For Use With: Power Roof Ventilators
Manufacturers Part Number: 411-STD 8
Mounting Location: Horizontal
Number of Panels: 1
Type: Backdraft
Warranty: 1 yr
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Product Specifications:
Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 8"
Product Height: 2.5"
Product Type: Dampers
Product Width: 8"
Quantity Included: 1
Manufacturer Part Number: 411-STD 8
Width: 7-3/4 in
Depth: 2 in
Height: 7-3/4 in
Weight: 2 lbs
Diameter: 8 in
Free Area: 0.31 ft³
Max Pressure In W.G.: 1 in
Max Velocity: 2000 ft/min
Rough Opening: 8 x 8 in
Brand: Air Conditioning Products
For Use With: Power Roof Ventilators
Manufacturers Part Number: 411-STD 8
Mounting Location: Horizontal
Number of Panels: 1
Type: Backdraft
Warranty: 1 yr

This 8-inch backdraft damper is designed for ventilation professionals and facility teams using exhaust fans or powered roof ventilators. It helps manage backdraft in horizontal exhaust installations at roof curbs, ductwork, or wall collars.

The non-flanged damper has a galvanized steel frame, aluminum blades, and felt seals along the blade leading edges. Spring-assisted blades open quickly and close quietly. It measures 8 inches wide by 8 inches deep by 2.5 inches high and is intended for horizontal-mount exhaust applications.

Key Features:

  • Horizontal exhaust design: Supports installation in horizontal exhaust system layouts.
  • Spring-assisted blades: Helps the blades open quickly when the exhaust system operates.
  • Felt blade seals: Promotes quieter closing and added weather protection.
  • Galvanized steel frame: Provides a durable frame structure for the damper assembly.
  • Aluminum blades: Provides lightweight blade construction.

Choose this 8-inch damper for horizontal exhaust fan or powered roof ventilator installations that use roof curbs, ductwork, or wall collars.

Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 8"
Product Height: 2.5"
Product Type: Dampers
Product Width: 8"
Quantity Included: 1
Manufacturer Part Number: 411-STD 8
Width: 7-3/4 in
Depth: 2 in
Height: 7-3/4 in
Weight: 2 lbs
Diameter: 8 in
Free Area: 0.31 ft³
Max Pressure In W.G.: 1 in
Max Velocity: 2000 ft/min
Rough Opening: 8 x 8 in
Brand: Air Conditioning Products
For Use With: Power Roof Ventilators
Manufacturers Part Number: 411-STD 8
Mounting Location: Horizontal
Number of Panels: 1
Type: Backdraft
Warranty: 1 yr
Width: 8.00 in
Height: 2.50 in
Depth: 8.00 in
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