20-inch horizontal-mount exhaust backdraft damper

20-Inch Horizontal-Mount Exhaust Backdraft Damper

SKU:
WBB771519
Our Price:
$77.94
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Product Specifications:
Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 20"
Product Height: 2.5"
Product Type: Dampers
Product Width: 20"
Quantity Included: 1
Shipping Weight: 5 lbs
Manufacturer Part Number: 411-STD 20
Width: 19-3/4 in
Depth: 2 in
Height: 19-3/4 in
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Free Shipping on Qualifying Orders Over $99
Product Specifications:
Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 20"
Product Height: 2.5"
Product Type: Dampers
Product Width: 20"
Quantity Included: 1
Shipping Weight: 5 lbs
Manufacturer Part Number: 411-STD 20
Width: 19-3/4 in
Depth: 2 in
Height: 19-3/4 in

This 20-inch backdraft damper is designed for commercial ventilation users who need to help prevent reverse airflow through horizontal exhaust openings. It works with a fan or power roof ventilator in roof curbs, ductwork, or wall collars.

The non-flanged damper has a galvanized steel frame, aluminum blades, and felt seals on the blade leading edges. Spring-assisted blades open quickly and close quietly. It measures 20 inches wide by 20 inches deep by 2.5 inches high and is intended for horizontal-mount exhaust applications.

Key Features:

  • Spring-assisted blades: Helps the damper open quickly when exhaust airflow begins.
  • Felt blade seals: Supports quieter closing and added weather protection.
  • Galvanized steel frame: Provides a durable frame structure for the damper assembly.
  • Horizontal exhaust design: Fits roof curbs, ductwork, and wall collars used with compatible exhaust equipment.

Choose this backdraft damper for 20-inch horizontal exhaust installations where reverse airflow control is needed with a fan or power roof ventilator.

Country of Origin: US
Material: Aluminum/Galvanized Steel
Product Depth: 20"
Product Height: 2.5"
Product Type: Dampers
Product Width: 20"
Quantity Included: 1
Shipping Weight: 5 lbs
Manufacturer Part Number: 411-STD 20
Width: 19-3/4 in
Depth: 2 in
Height: 19-3/4 in
Weight: 5 lbs
Diameter: 20 in
Free Area: 2.17 ft³
Max Pressure In W.G.: 1 in
Max Velocity: 2000 ft/min
Rough Opening: 20 x 20 in
Brand: Air Conditioning Products
For Use With: Power Roof Ventilators
Manufacturers Part Number: 411-STD 20
Mounting Location: Horizontal
Number of Panels: 1
Type: Backdraft
Warranty: 1 yr
Width: 20.00 in
Height: 2.50 in
Depth: 20.00 in
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