Butterfly Backdraft Damper

4.86
70 Customer Reviews
SKU BD

Price range: $46.95 through $226.95

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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
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.

Product Specs

Product Details
Application

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

Reviews (70)

70 reviews for Butterfly Backdraft Damper

4.86

Based on 70 customer reviews.

1-5 of 70 reviews
5 Stars92%
4 Stars4%
3 Stars0%
2 Stars1%
1 Star1%

  1. Great service, will buy from again!

    John F. —
    5.0

  2. The hinges are essentially tape, which is NOT shown in the illustration.
    Mine arrived with one of the tape hinges broken, and there is no way to easily repair it without special tape and the ability to separate the vertical supports.

    Robert —
    1.0
  3. Mickey —
    5.0

  4. far better quality than avail in big box stores

    Thomas K. —
    5.0
  5. Wes Hines —
    5.0
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Questions & Answers (4)

Questions and answers of the customers

    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?
  1. Q Will the 4" damper work if the whole unit is installed vertically? Or does the unit need to be in...... Read more
    Asked on February 13, 2021 4:46 am
    A

    This unit is designed to be installed horizontally in order to function properly.
    2. Can this damper (7" diameter) be used in the exhaust from a kitchen range hood?
  2. Q Can this damper (7" diameter) be used in the exhaust from a kitchen range hood?
    Asked on January 26, 2021 2:07 pm
    A

    Yes - this damper can be used with a kitchen range hood exhaust duct.
    3. Is a dryer strong enough to open the damper on the 4"?
  3. Q Is a dryer strong enough to open the damper on the 4"?
    Asked on December 21, 2020 4:20 am
    A

    This product is not rated for use with a dryer, as the foam gasket may trap lint and pose a fire risk.
    4. Would this work with a on demand hot water heater with no forced exhaust .
  4. Q Would this work with a on demand hot water heater with no forced exhaust .
    Asked on October 21, 2020 6:22 pm
    A

    Yes - this damper can be used with water heaters
    A NO, that is dangerous and will result in carbon monoxide poisoning. If it doesn't have sealed system, intake air, and forced exhaust, the convection rising of the warmer exhaust will not be reliably sufficient (keyword: reliably) to open the damper, even if the damper is easy to open.

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