Butterfly Backdraft Damper

4.84
75 Customer Reviews
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SKU BD

Price range: $32.95 through $166.95

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The FAMCO Difference

  • Quality constructed from heavy-duty galvanized steel: 28-22 gauge, depending on size (see more details below) with lightweight aluminum damper blades.
  • Used as a backdraft damper for heat exchangers, air exhaust systems, solar heating systems and other HVAC air intake or air exhaust applications where a powered damper is not needed, this product is not rated for use with a dryer.
  • Works in both horizontal or upward air flow positions and the foam seal provides minimal air leakage
  • Opens easily with normal air flow and closes with gravity, due to the specially designed angled aluminum damper blades
  • Available for duct sizes ranging from 4 inch to 20 inch

Shipping & Returns

Estimated Arrival: Fri. Aug 28th - Fri. Sep 4th.

iDelivery dates provided are an estimate and are subject to change without notice.

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Description Product Specs Q&A Product Reviews Related Products
Description

The FAMCO BD butterfly backdraft damper is used as a backdraft damper for heat exchangers, air exhaust systems, solar heating systems and other HVAC air intake or air exhaust applications where a powered damper is not needed, this product is not rated for use with a dryer. This damper works in both horizontal or vertical positions and the foam seal provides minimal air leakage. Due to its unique design and aluminum blades, it opens easily with normal air flow and closes with gravity. Quality constructed from heavy-duty galvanized steel, sizes 4-6 inch are 28 gauge, sizes 8-12 inch are 26 gauge, size 14 inch is 24 gauge, and sizes 16-20 inch are 22 gauge.

The FAMCO BD butterfly backdraft damper comes in sizes ranging from 4 inch to 20 inch. The FAMCO BD butterfly backdraft damper is manufactured by FAMCO in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product, please refer to the FAQs above or feel free to contact us.

Resources

Product Specs

Product Details
Application

Bathroom Fan, In-line / HVAC / Ductwork, Kitchen Fan, Range Hood

Reviews (75)

75 reviews for Butterfly Backdraft Damper

4.84

Based on 75 customer reviews.

1-5 of 75 reviews
5 Stars92%
4 Stars4%
3 Stars1%
2 Stars1%
1 Star1%
  1. Jerry Williams —
    5.0

    • Thank you for taking the time to leave a review on the Butterfly Backdraft Damper, Jerry!

      Daysia —
  2. Michael Gerrard —
    5.0

    • We appreciate you sharing a review on the Butterfly Backdraft Damper, Michael. Thanks for the 5-star rating!

      Daysia —
  3. Michael G. —
    5.0

    • Thank you for taking the time to leave a review on the Butterfly Backdraft Damper, Michael!

      Daysia —
  4. Brian Lauffer —
    5.0

  5. I ordered two. One of the two units has bent backdraft flaps – new in box, clearly happened before shipping.

    DAVID —
    3.0
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Questions & Answers (1)

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Q
Will the 4" damper work if the whole unit is installed vertically? Or does the unit need to be installed horizontally in order to function properly? Brad asked on February 13, 2021
A

This unit is designed to be installed horizontally in order to function properly.

 answered on February 17, 2021 verified owner
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Q
Can this damper (7" diameter) be used in the exhaust from a kitchen range hood? L Zmann asked on January 26, 2021
A

Yes - this damper can be used with a kitchen range hood exhaust duct.

 answered on January 26, 2021 verified owner
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Q
Is a dryer strong enough to open the damper on the 4"? Mike asked on December 21, 2020
A

This product is not rated for use with a dryer, as the foam gasket may trap lint and pose a fire risk.

 answered on January 5, 2021 verified owner
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Q
Yes - this damper can be used with water heaters asked on November 20, 2020
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Q
Would this work with a on demand hot water heater with no forced exhaust . Joseph Payette asked on October 22, 2020
A

Yes - this damper can be used with water heaters

 answered on November 20, 2020 verified owner
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