Message to Our Customers


Model # 433

Internet # 203481754

16.75 in. x 16.75 in. Aluminum Automatic Gable Square Mount Louvered Shutter Attic Vent

This item has been discontinued.
The Home Depot no longer carries this specific product.

$45.94 /each



Model # 433

Internet # 203481754

The Broan model 433 automatic shutter is the perfect accessory to Broan gable mount powered attic ventilators, provided you have adequate air intake on the opposite side of the attic or the in the eaves. Attic ventilation is critical to making any home more comfortable while helping to lower energy costs. Stagnant air can be removed, drawing fresh air across the surfaces. The home ventilating institute recommends at least one square foot of open air inlets for each 300 CFM of ventilator capacity.

  • Counter-balanced aluminum vanes open and close automatically with operation of fan
  • Steel reinforced for strength and durability
  • Weather-tight louvers keep attic dry year-round
  • Complete, easy-to-follow instructions for easy installation

Info & Guides

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Cut-Out Below Counter Height (in.) 
Cut-Out Left to Right Width (in.) 
16.25 in 
Net-Free Area (Sq. In.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Color Family 
Product Weight (lb.) 
3.59 lb 
Screen Included 
Ventilation Type 
Warranty / Certifications
Manufacturer Warranty 


Rated 4.3 out of 5 by 7 reviewers.
Rated 4.0 out of 5.0 by Good product! Product is good and would recommend it. You'll have to caulk the corners but that's no big deal (few gaps). Be-careful when handling due to it can be bent. I bent mine while screwing it to fan shroud but it was easy to re-straighten back out. I used mine for a solar attic vent. The fan I bought had a 20 watt solar panel which is not really strong enough to push the louvers completely open so I would recommend using a 40 to 60 watt solar panel. I went ahead and bought a 60 watt solar panel and it blows the lovers wide open! When using a solar fan, you have to keep in mind part of the pressure from the fan has to have enough force to push open the louvers and this will cause the fan to run a bit slower so that is why I recommend the larger wattage for solar use. If you are handy, you can buy a car radiator fan for $50.00 from online auto store, then buy a 60 watt monocrystalline solar panel for $105.00 at amazon. Find a remote controller from attic breeze or some other place and you're all set! Why spend $$$ when you can do it yourself! September 23, 2014
Rated 5.0 out of 5.0 by Louvered Attic Vent This was a good size for us to use with the attic fan installed. Happy it worked out, since we bought it through the website. Shipping took about a week. No complaints. October 2, 2014
Rated 3.0 out of 5.0 by Good product. Works well. But, not perfect Product works well and is easy to install. Louvers are light weight, so the air from my attic fan easily opens them. They also close quietly, again because they are light. All is aluminum, so they won't rust. My biggest problem was that the aluminum frame did not meet soundly in the mitered corners. There was a gap on each corner that would allow water to infiltrate if the vent is mounted so it is exposed to wind and rain. I used angle aluminum screwed on the outside of each corner to narrow the gap, then caulking to seal them. In the end it seems fine, but did require extra, unexpected effort. July 8, 2014
Rated 4.0 out of 5.0 by Go-To shutter There is another "big-box store" that offers a product at a similar price...except their's is plastic and does not last. I know....I've gone through 3 of them and then I found this one. I would have rated it as "excellent" except that one of the vanes was dislodged in shipping, but was easily repaired. October 10, 2014
Rated 5.0 out of 5.0 by Rough-in size to cut siding to large in instructions Great vent, high quality, instructions have you cut hole 1/2" larger than vent size, to much in my opinion January 28, 2014
Rated 5.0 out of 5.0 by nice product Good product, I was happy to find one made out of aluminum instead of plastic. Seems to be well made and it works well at a good price. May 13, 2014
Rated 4.0 out of 5.0 by Perfect This is what I needed, and Home Depiot was the only store that had it. Took toooo long to get to me but it is just fine. March 12, 2014
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