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Internet # 205715171

Model # KOM 200 U

Store SKU # 1001199653

8 in. Galvanized Back-Draft Damper with Rubber Seal

(32)Questions & Answers (8)
$1887
  • Galvanized steel construction ensures durability
  • Rubber gasket prevents outside air from entering the home
  • Easy to insert into an 8 in. round ducting
  • View More Details
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Product Details

VENTS 8 in. KOM 200 U round back valve is especially designed to prevent back-draft. The spring loaded back-draft damper is manufactured of galvanized steel and contains rubber seal. Easily fits into your vent system, the installation requires minimal labor and time.
  • Prevents outside air from penetrating the home
  • Rubber gasket in closed position ensures minimal leakage
  • Well-balaned
  • Inserts into duct for simple installation
  • Fits into 8 in. round ducting
  • Horizontal installation only
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

8Questions
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Q:What is the max temperature rating of the rubber seal
by|Nov 21, 2022
1 Answer
Answer This Question

A:  The backdraft damper is designed for use in temperatures from -22°F to180°

by|Nov 22, 2022
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    Q:Is there a chance of the damper doors possibly sticking shut if this product is used in a range h...
    by|Dec 17, 2020
    1 Answer
    Answer This Question

    A:  The KOM 200 U opens at 25 cfm @ 0.05 and 50 cfm at 0.1 static pressure. Using the KOM -U series with a Range Hood System should not affect the damper’s performance. The range hood filter usually does a good job preventing the presence of grease and dirt in the ductwork or on the damper. Please contact customer service they will fully resolve this issue.

    by|Jan 17, 2023
      1 found this answer helpful
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      Q:Can it be installed in vertical position?
      by|Oct 15, 2018
      2 Answers
      Answer This Question

      A:  Yes it can. I do recommend making sure you have enough cfm that it opens when vertical.

      by|May 19, 2019
        1 found this answer helpful

        A:  The KOM backdraft damper is designed to be installed in a horizontal position where the swivel axis is in a vertical position.

        by|Jul 27, 2023
          1 found this answer helpful
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          Q:so can it be installed on my ceiling and still work correctly?
          by|Jun 25, 2018
          3 Answers
          Answer This Question

          A:  Yes it can be installed in the ceiling. It is designed to prevent backdraft in the ventilation system. So as long as it is being utilized for this purpose then you should be fine.

          by|May 5, 2023

            A:  After doing some testing on it I found that it works best on a slight angle where the doors are up. The spring on it is just strong enough to keep it closed. I have a 700 cfm blower about 3 feet in front of the damper, bows wide open. I live in Wisconsin and with the cold winds this past winter, I had no issues with. Blocked all the cold air. I do know that a 200 cfm inline booster fan will barely blow it open. So, depending on your needs and what you have in front of it and considering you have the depth in your ceiling, yes it will work.

            by|Feb 20, 2020
              3 found this answer helpful

              A:  Yes that’s what i did, air flow going up so when the return fan shuts off the spring allows the flaps to drop

              by|Nov 14, 2018
                1 found this answer helpful
                Showing 1-4 of 8
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                Customer Reviews

                4.1 out of 5
                (32)
                • 4.1
                  out of 32 reviews
                • 63% recommend this product
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                Showing 1-10 of 32 reviews
                Aug 28, 2023
                One of the flaps gets stuck open
                One of the flaps gets stuck open. I tried everything to keep it from sticking but nothing works. Otherwise it works great.
                by
                  Feb 16, 2023
                  You foam melted / shrunk. So...
                  You foam melted / shrunk. So it did not do its job
                  by
                  • Verified Purchase
                  Dec 7, 2022
                  fit perfectly and the price is good too....
                  fit perfectly and the price is good too.
                  by
                  • Verified Purchase
                  Jul 10, 2022
                  Rating provided by a verified purchaser...
                  Rating provided by a verified purchaser
                  by
                  • Verified Purchase
                  Apr 15, 2022
                  by
                  • Verified Purchase
                  1 found this review helpful
                  Apr 2, 2022
                  by
                  • Verified Purchase
                  Jul 9, 2021
                  Perfect fit. installed with continues heat and i have seen no expanding.
                  Perfect fit. installed with continues heat and i have seen no expanding.
                  by
                  • Verified Purchase
                  • Recommended
                  Apr 9, 2021
                  Good Quality works per design...
                  Good Quality works per design
                  by
                  • Verified Purchase
                  Mar 20, 2021
                  Works as designed and no workmanship issues as all. Solidly...
                  Works as designed and no workmanship issues as all. Solidly built.
                  by
                  • Verified Purchase
                  Jan 14, 2021
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                  • Verified Purchase
                  Showing 1-10 of 32 reviews