Inline Butterfly Backdraft Damper with Spring - Galvanized

$28.50$60.79

Category: HVAC Damper – Subcategory: Backdraft Material: Galvanized Steel – Finish: Mill – Thickness: 28 Gauge Shape: Round – Dimensions: 4″, 5”, 6″, 7″, 8″, 10″ (undersized to fit in ductwork)Sku: BDS

Download the Product Specs .PDF

Clear

Description

The FAMCO BDS inline Butterfly Backdraft Damper with spring is used as an inline back draft damper for heat exchangers, exhaust systems, solar heating systems and other intake or exhaust applications where a powered damper is not needed. 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 Galvanized steel undersized to fit inside round duct. The FAMCO BDS inline Butterfly Backdraft Damper with spring is available for duct sizes 4 inch, 5 inch, 6 inch, 7 inch, 8 inch, 10 inch. Spec sheet available for download. The FAMCO BDS inline Butterfly Backdraft Damper with spring 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 damper, please refer to the FAQs above or feel free to contact us by phone or email.

Spec Sheet

Print Spec Sheet

Inline Butterfly Backdraft Damper with Spring - Galvanized

SKU: BDS

Questions and answers of the customers

    Is this suitable for a dryer vent
  1. Q Is this suitable for a dryer vent answer now
    Asked on January 17, 2021 12:34 pm
    A

    No - this is not rated or recommended for use with a dryer vent. the foam gasket may pose a risk of trapping lint.

  2. At what pressure does the damper open with the installed spring?
  3. Q At what pressure does the damper open with the installed spring?
    Asked on January 5, 2021 8:49 am
    There are no answers for this question yet. Answer now
  4. Will this reduce the airflow for a 1200 cfm BBQ hood vent if it was placed above the fans to block cold air coming down 10" stack when fan is not running? Thanks
  5. Q Will this reduce the airflow for a 1200 cfm BBQ hood vent if it was placed above the fans to bloc...... Read more
    Asked on December 28, 2020 4:15 pm
    There are no answers for this question yet. Answer now
  6. an the damper be reversed or come reversed from the factory ?
  7. Q an the damper be reversed or come reversed from the factory ? answer now
    Asked on December 18, 2020 2:23 pm
    A

    No - we are unable to customize this product at this time, unfortunately.

  8. Will this block cigar odor?
  9. Q Will this block cigar odor? answer now
    Asked on December 12, 2020 1:46 pm
    A

    This is not what this is designed for, so we could not say - it is not 100% air tight, however, so this is unlikely.

  10. How many CFM is the 4 inch damper rated for? Is it appropriate for a modern Broan exterior exaust range hood?
  11. Q How many CFM is the 4 inch damper rated for? Is it appropriate for a modern Broan exterior exaust...... Read more answer now
    Asked on November 2, 2020 5:01 pm
    A

    We do not currently have CFM test ratings for these dampers

  12. Installation instructions? Does this need to be screwed to the outer duct to hold it in place, or can it simply be inserted in-line?
  13. Q Installation instructions? Does this need to be screwed to the outer duct to hold it in place, or...... Read more answer now
    Asked on October 21, 2020 6:18 pm
    A This product will fit inside of the duct work and is held in place via the foam gasket, and should not require additional mounting.

Send me a notification for each new answer.
Bulk Discounts + Free Shipping = Pro's Advantage | Learn More
Bulk Discounts + Free Shipping = Pro's Advantage
Learn More