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Dampers

Internet #

205130126

Model #

4INC

Store SKU #

1000804620

Premium 4 in. Back Draft Damper

(23)Questions & Answers (3)
$2492
  • Rust-resistant galvanized steel construction offers longevity
  • Fabric sleeve allows contaminated air to flow out of bathroom fan
  • 1-way valve prevents the entry of outdoor drafts
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0 in stock
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Product Details

Premium Back Draft Damper is installed into ductwork to prevent unwanted outdoor drafts from entering into your bathroom fan, kitchen fan, clothes dryer, etc. Ultimate one way air flow valve allows air to flow out but not back in. It does not rust or require any maintenance. Non-mechanical in-line one way air flow valve that requires minimal pressure to operate, has no moving parts. Sized slightly less than the internal diameter of the duct to slip easily into duct. Rubber gasket provide a friction fit and air-tight seal. Eliminates cold air back drafts in the winter saving heating loss. Eliminates hot air back drafts in the summer saving air conditioning loss. The damper consists of a specially formulated fabric sleeve attached to an outer metal sleeve. The fabric sleeve will allow air to pass through unrestricted in the desired direction of flow without reducing system efficiency. It is silent, produces no metal clanging sounds, tested to UL723 standards and can be installed in solid or flexible ductwork in any orientation. Installs easily - simply slide into duct. Specifically designed to stop back drafts from your clothes dryer, bathroom exhaust fan, kitchen fan, pellet stove, direct vent water heater and direct vent furnace. Available in 4 in., 5 in., 6 in., 7 in. and 8 in. sizes.
  • Prevent unwanted outdoor drafts from entering into your bathroom fan, kitchen fan, clothes dryer, etc.
  • 1-way air flow valve allows air to flow out but not back in
  • Eliminates cold air back drafts in the winter saving heating loss and hot air back drafts in the summer saving air conditioning loss
  • Can be installed in solid or flexible ductwork in any orientation
  • Installs easily - simply slide into duct
  • Has no moving parts
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

3Questions
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Q:Will it work if installed vertically (with an appropriate roof vent cap)?
by|Jul 11, 2022
0 Answer
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Q:I have a small mechanical ventilator rated at 180 cfm at one end of a crawl space. I propose to...
by|May 28, 2018
4 Answers
Answer This Question

A:  Yes it will open but it will not close You will need a very strong wind to close the damper it will not close on itself as the fabric is to rigid.

by|May 5, 2023

    A:  I see no reason that this would not allow ain in from the vacuum. I don't know your set up, but an out side breeze or wind will push through the vent into your crawl space, and it would also allow rodents through. I have 2 dryers connected to one exhaust vent. On each leg of the wye I installed these to keep the exhaust from back feeding into the dryer that was not being used.

    by|May 5, 2023

    A:  I don't think it would have ever closed in the first place.

    by|Jan 6, 2022

      A:  The damper is for exhaust ducts and blocks backdrafts. The damper is normally open to allow air flow out, but closes and seals when a backdraft occurs. Crawl spaces should be well ventilated with all vents open to allow air flow in and out. Regards, Mark - Battic Door Energy

      by|May 5, 2023
        caret
        Q:Is this safe to put in a dryer vent?
        by|Mar 7, 2017
        4 Answers
        Answer This Question

        A:  Yes. I have 2 dryers going into the same vent and used this to keep from back feeding into the dryer that was not being used.

        by|Dec 5, 2019
        2 found this answer helpful

        A:  This was designed for use with a dryer vent exhaust system.

        by|Jul 27, 2020

          A:  No as it may cause a fire

          by|Mar 16, 2022
            1 found this answer helpful

            A:  Premium Back Draft Damper is installed into ductwork to prevent unwanted outdoor drafts from entering into your bathroom fan, kitchen fan, clothes dryer, etc. Thank you for shopping at The Home Depot. Charlotte of the Home Depot Community.

            by|Mar 16, 2022
            2 found this answer helpful
            Showing 1-3 of 3
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            Customer Reviews

            2.9 out of 5
            (23)
            • 2.9
              out of 23 reviews
            • 40% recommend this product
            Filter by:
            Showing 1-10 of 23 reviews
            Sep 27, 2016
            Look for a different product
            No, it will not prevent odor or air from back drafting. The way the material is glued inside the duct and the "cloth" material used make it impossible to self seal regardless of orientation. Even standing on end, the material is so stiff, it stands straight up. If you want to prevent backdraft, this is not the product to get.
            by
            • DIY
            14 found this review helpful
            May 12, 2022
            So easy to install where nothing else would work. ...
            So easy to install where nothing else would work. Met all my expectations.
            by
            • Verified Purchase
            Apr 1, 2022
            It did the job. Stopped the down draft from wind...
            It did the job. Stopped the down draft from wind turning on my dryer booster fan.
            by
            • Verified Purchase
            Jan 6, 2022
            The fabric is too stiff to change position. It...
            The fabric is too stiff to change position. It wants to stay fully open all the time and gravity does nothing to it, this isn't better than just putting in normal tubing.
            by
              Dec 22, 2021
              Waste of money
              Absolute waste of money! Great Idea but it does nothing for the back draft issue at all.
              by
              • Verified Purchase
              1 found this review helpful
              Mar 31, 2021
              Works pretty well - be sure to mount as close...
              Works pretty well - be sure to mount as close to the top of, or the end of, the duct (just behind the vent head / cover on the roof or the outside wall). I have installed six of these and only one of them is not preventing 95-100% of the flapping noise from the bathroom exhaust fan. The one exception is more like 75% effective, and I may mount another one back-to-back to see if that does the trick
              by
              • Verified Purchase
              Mar 6, 2021
              great product. if it doesn't work correctly, you probably installed...
              great product. if it doesn't work correctly, you probably installed it upside down.
              by
              • Verified Purchase
              Feb 18, 2021
              Rating provided by a verified purchaser...
              Rating provided by a verified purchaser
              by
              • Verified Purchase
              Feb 1, 2021
              This product should not be allowed to be sold. It doesn't work. I just hope everyone who buys thi...
              This product should not be allowed to be sold. It doesn't work. I just hope everyone who buys this tests it before installing it in the ceiling. The material is like a teflon paper - I thought it was like a latex material. But because it's a heavy weight material, there is NO WAY this will seal off backdrafts. DO NOT BUY THIS.
              by
                Mar 31, 2020
                We got so tired of the flapper in the bathroom...
                We got so tired of the flapper in the bathroom fan banging away when it was windy. I installed this device right next to the flapper because I could get access to the exhaust vent. I used aluminum duct tape to secure it and the problem went away! No more clanging and banging when it's windy!
                by
                • Verified Purchase
                Showing 1-10 of 23 reviews

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