Broan 433 Automatic Shutter for Attic Fans

- Item #: BCI417790
Originally $77.50, You Save 40%
Free Shipping on orders over $49.00!
52 In Stock
Ships Today, October 31st


Please select a finish

Earn 47 points with the purchase of this product Learn More

and earn 350pts

Questions about Broan 433?

Contact us for advice or more details. Our product specialists are here to help.

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

Broan 433 Product Specifications

Country Of Origin USA

Installation Resource Center

Whether you are installing the product yourself or hiring a professional, our installation Resource Center has everything you need to get your project done. Visit the Installation Resource Center to get started.

Broan 433 Reviews

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 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 This damper works great This is the perfect companion for my fan.
Date published: 2012-10-28
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 works fine Fine product, works fine and better quality than other plastic shutters on the market. Wish it were available in more sizes, compatible with older gable vent styles.
Date published: 2009-09-07
Rated 5 out of 5 by from Automatic Shutter Nice product, well made, however a solar powered fan is not designed to push the shutters open. Would be great with an 120v powered fan.
Date published: 2010-04-13
Rated 4 out of 5 by from as advertised Performs as expected. Arrived in good condition and was easy to install
Date published: 2011-09-07
Rated 4 out of 5 by from Does the job Easy to install and does the job.
Date published: 2012-08-02
  • The gable vent I currently have meausres 16 x 17 3/4 - will this work?

    A. The Broan 433 measures 19 3/4" high by 19 1/2" wide.
  • the dimensions i need are 32 by 32 do you have one that size?

    A. The Broan 433 is not a 32 x 32. thank you
  • What is the rough cut dimensions for installlation?

    A. The Broan 433 is 16.25 x 16.25 inches. These are the only dimensions I could find online.
  • What are the dimensions?

    A. The dimension are: 19 3/4" high by 19 1/2" wide.
  • Do you carry an aluminum vent in white as well?

    A. The Broan 433 does not come in white, it only comes in a natural aluminum color. It can however be painted after you recieve the item.
  • available in 20x25in or something close?

    A. The Broan 433 is 19 3/4" tall x 19 1/2" wide, and is only a set dimension.
  • Would this operate OK if installed horizontally and below a attic fan? Also do you have one around 18" x 18"?

    A. The Broan 433 is intended to be mounted in front of an attic fan. The louvers are gravity actuated by the force of the fan and, therefore, may not operate properly if not mounted properly.
  • I have a rough opening of 16 1/2" by 17 1/4". Will it fit in that opening properly. When the fan goes on does the shutters go outward?

    A. The Broan 433 is for an opening of 16.5 inches x 16.5 inches. So it wouldn't quite work. The grille dimensions are 19 1/4" x 19 1/4". Per Broan they do not have any that meet the 16.5" by 17 1/4".
  • Is this white or is it aluminum colored?

    A. The Broan 433 automatic shutter is a natural aluminum color.
  • Is this all aluminum or half plastic?

    A. The Broan 433 is made completely from aluminum.
  • What are the cut-out hole dimensions for the Broan 433?


    The cut-out hole dimensions are 16.5 inches x 16.5 inches.

Buy the Broan 433 at Research Broan 433 online. Find Broan 433 features and specifications. Get the best deal by comparing the Broan 433 today.

Recently viewed items
  • Broan 433
    Broan 433

    Automatic Shutter for Attic Fans

× Shipping Rates & Methods

The cost to ship items varies by item, shipment and shipping option.

Free Ground Shipping on Orders Over $49 *

Standard ground shipping transit time is 5-7 business days.

Free Freight Shipping on Orders Over $1500 *

Curb side delivery (also called freight or "LTL" shipping) is reserved for large, heavy, or oversized items like chandeliers, bathtubs, shower doors, etc. Items are palletized and loaded onto a large truck for shipment, and delivered to your curb by scheduled appointment. Transit time is 7-10 business days.

* For exact shipping costs, add the product(s) to your cart and enter your zip code. All offers pertain to the lower 48 states and do not include deliveries to Alaska, Hawaii or Canada.

Learn more about shipping rates and policies