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Backdraft Damper 18" - 411-STD 18

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Backdraft Damper 18" - 411-STD 18

Item #: WBB771505

Sold By: globalindustrial.com

Ships same day. Estimated lead times do not include weekends or holidays. Transit time is determined by shipping method and destination. Orders requiring credit information might take additional time.

Price: $23.25

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Backdraft Dampers are non-flanged horizontal mount exhaust backdraft damper. The frame is galvanized steel with aluminum blades. The blades have a felt seal on the leading edge for quiet closing and better protection from the weather. Spring assisted to allow the blades to open quickly. Ideal for use in roof curbs, ductwork, or wall collars when using a fan or power roof ventilator. Recommended for horizontal mount exhaust applications.

MADE IN THE USA

Product Specifications

    • WIDTH INCHES17-3/4
    • DEPTH INCHES2
    • HEIGHT INCHES17-3/4
    • ROUGH OPENING INCHES18 x 18
    • WEIGHT LBS4.5
    • FREE AREA SQ. FT.1.71
    • NUMBER OF PANELS1
    • MOUNT TYPEHorizontal
    • TYPEGravity
    • FOR USE WITHPower Roof Ventilators
    • LIMITED WARRANTY YEARS1
    • MANUFACTURER'S PART NUMBER411-STD 18
    • CONSTRUCTIONGalvanized Frame / Aluminum Blades
    • VELOCITY FEET PER MINUTE2000

Avg. Customer Rating: (2 customer reviews)

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You get what you pay for

Your review: These items arrived within the specified time frame and they were reasonably priced, however, we were rather disappointed in the quality. The louvers weren't square with the frame, or the frame wasn't square with the louvers. Either way, we have to tweak them to square them up. The felt cushions on the louvers are minimal and I fear we will be re-doing this very labor intensive task again sooner than we should have to because the felt will not hold up and the louvers will clang, which is why we've replaced the 30 year old ones.

Pros: Reasonable price and delivery.

Cons: Poor material quality and workmanship.

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18in. backdrart damper

Your review: 18 in backdraft damper arrived in good shape, item works well, precision quality constructed. Item was very fairly priced.Thank you to Global. I would definitely recommend your services to others. Thank you again very much.

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There are 2 questions and 1 answers for this product.

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how well does this seal against backdraft? how much air may leak through when closed? Thanks in advance.

Question Asked By: donald , July 17, 2015

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