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Backdraft Damper 18" - 411-STD 18

Backdraft Damper 18" - 411-STD 18

Item #: WBB771505

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Price: $27.95

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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

  • BRANDAir Conditioning Products
  • WIDTH INCHES17-3/4
  • DEPTH INCHES2
  • HEIGHT INCHES17-3/4
  • ROUGH OPENING INCHES18 x 18
  • WEIGHT LBS4.5
  • MAX PRESSURE IN W.G. INCHES1
  • NUMBER OF PANELS1
  • TYPEBackdraft
  • FOR USE WITHPower Roof Ventilators
  • LIMITED WARRANTY YEARS1
  • MANUFACTURER'S PART NUMBER411-STD 18
  • DIAMETER INCHES18
  • CONSTRUCTIONGalvanized Frame / Aluminum Blades
  • MAXIMUM VELOCITY FEET PER MINUTE2000
  • FREE AREA SQ. FT.1.71
  • MOUNT TYPEHorizontal
Customer Review

3.5

  • 5 Star

    1
  • 4 Star

    0
  • 3 Star

    0
  • 2 Star

    1
  • 1 Star

    0

Most Recent Reviews

  • Most Recent Reviews
  • Highest Rated Reviews
  • Lowest Rated Reviews
  • Reviewer: Anonymous

    Date: July 18, 2016

    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.
  • Reviewer: Anonymous

    Date: March 17, 2014

    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.
Product Q & A

There are 2 questions and 2 answers for this product.

  • It says horizontal, does that mean I can't use it facing up? My exhaust fan is vertical as well as the duct going to the roof.

    Question Asked By: Alexis, January 11, 2019

    Answer This Question

    Question Answered By:

    • anonymous

      Hello, yes this unit is designed to be mounted horizontally not vertically. Please contact our sales team at 1.888.978.7759 for more information regarding vertical mount options. Thank you for your interest in our product.

  • 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

    Answer This Question

    Question Answered By:

    • Product Expert, July 17, 2015

      This fan would be rated decent in sealing against backdraft. However if you are looking for low leakage this is not the correct dampeer. These are not designed for leakage so Tim from Air Conditioning Products was not able to quantify how much air may leak through. The customer should consider go to a motorized damper in he wants it fairly airtight. It really depends on the specification the customer is trying to meet. Is the customer trying to meet a leakage spec?

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Backdraft Damper 18" - 411-STD 18

Backdraft Damper 18" - 411-STD 18

Item #: WBB771505

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