Broan 433 Automatic Shutter for Attic Fans

- Item #: BCI417790

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Automatic Shutter - Model 433

  • Allows More Air Movement Than Conventional Stationary Attic Louvers
  • Counter-Balanced Aluminum Vanes Open Automatically When Ventilator Is Turned On, Close When Fan Stops
  • Flange Fits Flush Against Outside Wall For Neat, Smooth Appearance
  • Reinforced For Strength; Provides Weather Tight Closure

Additional Broan Links

Our SKU: Broan 433

This product is listed under the following manufacturer number(s):

  • Broan 433

*Denotes a finish or option that has been discontinued

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Broan 433 Reviews

Rated 5 out of 5 by from This damper works great This is the perfect companion for my fan.
Date published: 2012-10-28
Rated 4 out of 5 by from good working shutter Fits real well with a Broan 15" attic fan with easy floating shutters from fan power and a nice fitting seal when fan is off.
Date published: 2011-10-07
Rated 5 out of 5 by from Required Accessory This shutter is required for your Broan fan for a proper installation. I highly reccommend it.
Date published: 2011-04-19
Rated 4 out of 5 by from Not elegant, but it does the job This grille should be extremely durable; its construction is top-notch, with all-aluminum wear points and high-quality weatherstripping. If I were installing it again, I would shim out the bottom to give it a bit of top-in tilt to ensure that the flaps close securely when the fan's not running. Hung plumb, they have a tendency to not shut tightly; this could provide entry for insects.
Date published: 2012-08-07
Rated 4 out of 5 by from Looks Nice but... Nice looking, solid piece. Easy to install, functions as advertised, would have appreciated some nice matching mounting screws, but nothing included so a trip to Lowe's was necessary to scrounge for something that would work. My main peeve with this item is now that fall has arrived, and the wind has picked up, it bangs open and shut quite loudly on windy days (fan not running) and it's 35 feet in the air, so not easy to get to to find a solution. It would be great if there were a lock on the inside that I could get to from the attic, to seal it for the colder months!
Date published: 2014-11-07
Rated 5 out of 5 by from Well made. Replaced a plastic shutter that the sun ate up. This one seems well made and should last a long time.
Date published: 2014-07-07
Rated 5 out of 5 by from Ideal Product - Ideal Price I researched the product and found to provide the best price and expedited shipping.
Date published: 2014-06-15
Rated 5 out of 5 by from Aluminum Shutter for attic fans Produce was perfect-as ordered. Used to find these in the big box stores, but no more..oh well. At least we can order them online. They work fine..Stay closed when fan is off, keeping heat in & vermin out. Work thru gravity. I have one that's 35 years old, still works great!
Date published: 2013-09-03

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