Continental Fan Manufacturing BDD200 Spring Loaded Backdraft Damper for 8" Ducting

Item #: bci1471539

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Technical Specs

Depth 3.8
Duct Size 8" Round
Function Backdraft Damper

Dampers function as flow regulators and prevent ventilation when not desired, such as when the system is not in use. Let us provide all the accessories needed to install an AXC In-Line Duct Fan or EXT External Mount Exhaust Fan.


  • Neoprene damper seal minimizes leakage
  • 20 gauge steel housing, aluminum spring loaded butterfly damper blades
  • Gasket designed to withstand temperatures from -22° F to 180° F
  • Requires from 0.04 to 0.08 inches wg pressure to open
  • Simple installation in any position, entire assembly inserts into duct
  • Exterior foam gasket assures a tight seal against duct
  • Includes stamped metal sleeve with center pin design
  • Fits 8" Round ducting


  • Diameter: 8"
  • Depth: 3.8"

Continental Fan Company was established in 1986 to manufacture and distribute quality ventilation equipment. Their objectives then were simple… to provide superior products, dependable service, and competitive pricing. They remain unchanged today.

Additional Continental Fan Manufacturing Links

Our SKU: BDD200

This product is listed under the following manufacturer number(s):

  • N/A

*Denotes a finish or option that has been discontinued

1 Question from the Community

  • The BDD200 will work with the CFM  EXTT200A.

    Is this compatible with the CFM EXTT200A?


    The BDD200 will work with the CFM  EXTT200A.

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