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Premium 4 in. Back Draft Damper

$2400
  • 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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Price:
$2400

Product Overview

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

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
4
Product Height (in.)
6
Product Length (in.)
6
Product Width (in.)
4

Details

Duct Type
4" Round
Gauge
0
Insulated
No
Material
Galvanized Steel
Returnable
90-Day

Warranty / Certifications

Certifications and Listings
No Certifications or Listings

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 2.8
    out of 19 reviews
  • 44% recommend this product
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Showing 1-10 of 19 reviews
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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
13 people found this helpful
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
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
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by
  • Verified Purchase
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
    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
    Didn’t look like it would be effective against backdrafts...
    Didn’t look like it would be effective against backdrafts
    by
    • Verified Purchase
    Easy to install , seems to work like it should...
    Easy to install , seems to work like it should...
    by
    • Verified Purchase
    • Recommended
    1 person found this helpful
    No more draft in the laundry room!
    No more draft in the laundry room!
    by
    • Verified Purchase
    • Recommended
    Installed easily but I had to add weight to keep...
    Installed easily but I had to add weight to keep it closed.
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    • Verified Purchase
    Showing 1-10 of 19 reviews