Speedi-Products 4 in. Galvanized Back Draft Prevention Damper-AC-BD 04 - The Home Depot


Model # AC-BD 04

Internet # 202907123

4 in. Galvanized Back Draft Prevention Damper

Speedi-Products 4 in. Galvanized Back Draft Prevention Damper

This item has been discontinued.
The Home Depot no longer carries this specific product.

$19.88 / each


Model # AC-BD 04

Internet # 202907123

Store SO SKU # 302457

Speedi-Products 4 in. Galvanized Sheet Metal Round Back Draft Damper. Ideal for use with intake or exhaust duct systems. Can be used for Remodeling, Do it yourself & New Residential projects.

  • Ideal for use with intake or exhaust duct systems
  • Seal joints with approved duct mastic sealants
  • Insulate ductwork for improved energy efficiency and comfort
  • Consult your local building codes for approved installation practices

Info & Guides

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Assembled Depth (in.)  4 in  Assembled Height (in.)  6 in 
Assembled Width (in.)  4 in  Product Depth (in.) 
Product Height (in.)  Product Width (in.) 
Brand/Model Compatibility  ALL BRANDS  HVAC application  All HVAC types 
Product Weight (lb.)  0.5 lb  Returnable  90-Day 
Warranty / Certifications
Certifications and Listings  No Certifications or Listings  Manufacturer Warranty  1 YEAR 


Rated 4 out of 5 by 1 reviewer.
Rated 4 out of 5 by Damper works as described to prevent back drafts I used this in the exterior exhaust vent I added to my microwave oven, which ventilates the top of the stove. It works well in my vertical vent configuration, where the fan pushes the air straight up, and the damper closes due to gravity when the fan is not running, which stops cold air from coming in. It has a foam-like seat, which stops almost all reverse air flow. The damper is split into 2 half-circles, which pivot around a center support to open or close. January 3, 2012
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