Model # SGM20

Internet #100092056

Store SKU #372522

Master Flow 20 in. Aluminum Gable Mount Automatic Shutter
0050206350409

Master Flow

20 in. Aluminum Gable Mount Automatic Shutter

  • Gable Mount Automatic Shutter
  • Use with Master Flow models PG2 and PG3
  • Aluminum construction
$44.45 /each

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Product Overview

Automatic 20 in. Power Gable Vent Shutter is designed to be used with Master Flow EGV/PG series electric gable fans. The shutter will open when the electric gable vent is operating. Constructed of white aluminum, that can be painted.

  • Use with all attic power gable mount vents
  • Moving air opens the louvers only when the power vent is operating
  • When vent is off, shutter helps prevent infiltration of rain, snow, insects, etc
  • Maintenance-free white aluminum construction (Can be painted)

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Customer Questions & Answers

5 Questions5 Answers

Customer Questions & Answers

20 in. Aluminum Gable Mount Automatic Shutter
20 in. Aluminum Gable Mount Automatic Shutter

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2 answers

Inside Mount?

This question is from 20 in. Aluminum Gable Mount Automatic Shutter
Asked by
Scarsdale NY
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November 7, 2015
Can I mount this inside of the attic, that is, upstream of the fan in terms of exhaust air flow. I have a 17" x 17" cut-out fan installed now with no louvers. Also, are there any other similar items to compare that are sold by Home Depot? Thanks.
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Answers (2)

Asked by
Redding ca
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August 23, 2016
Answer: 
no it mounts on the exterior only.
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November 9, 2015
Answer: 
Thank you for your interests in MasterFlow Products ... No, this item is design to be installed as an exterior wall vent. Please call Customer Care at 800-755-9392, M-F 8A-5P ET with any additional questions.
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1 answer

does this shutter come in smaller size

This question is from 20 in. Aluminum Gable Mount Automatic Shutter
Asked by
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October 28, 2016
does this shutter come in smaller size
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Answer (1)

October 30, 2016
Answer: 
Hello Bart! Thank you for your recent inquiry with The Home Depot. This shutter is not available in a smaller size online. For further assistance, please contact your local Home Depot store or an online representative at 800-430-3376. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot.
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1 answer

Which end of roof to mount?

This question is from 20 in. Aluminum Gable Mount Automatic Shutter
Asked by
New Mexico
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October 20, 2016
I have gable ends on the north and south walls. Which end would be best to mount the motor and thermostat? We get a lot of wind. Is there a way to force them closed in the winter?
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Answer (1)

Asked by
Redding ca
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October 20, 2016
Answer: 
If you have a prevailing wind from from one direction I would mount it on the opposite end but it really doesn't matter a lot. They automatically close when the fan is not on.
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1 answer

It seems to open easily with a breeze. Any suggestions? The online documentation says it only opens when the fan is on.

This question is from 20 in. Aluminum Gable Mount Automatic Shutter
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January 12, 2016
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Answer (1)

January 18, 2016
Answer: 
The vent is opened by air pressure produced from the fan when operating. When wind currents from outside the dwelling are sufficient to lift the vanes there is not any to prevent them from opening. Please call MasterFlow Technical Services at 800-211-9612, M-F 8A-5P ET with any additional questions.
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Customer Reviews

20 in. Aluminum Gable Mount Automatic Shutter is rated 4.0 out of 5 by 19.
Rated 5 out of 5 by from Excellent Product I needed a way to vent my shed, I checked all the shed stores and none could advise of one single product, so my son and I did a few basic measurements and headed off to Home Depot, with measurements in hand items to finish the job nd we quickly found the fan and gable end shutter, purchased all the necessary stuff to do the job. listed below is what we purchased, if you need to run a new drop for your fan. 1. 1 - 20ft 2/4 plain will do well. 2. 1 - box of 2 1/2 to 3 in wood screws, small box will do if you can find them. 3. 1 - tube of white exterior caulk 4. 1 - roll of romex in door wire. 5. 3 - tubes 3/4in conduit 6. 3 - 90 degree 3/4in Follow the instructions on the vent box and you should not have any problems.
Date published: 2016-09-12
Rated 4 out of 5 by from Ok came with no screws also purchased recommend fan you would think frame for shutter would match up with fan no not a big deal just a observation I mounted it on small pieces of rubber just incase of noise works well no noise
Date published: 2016-10-26
Rated 5 out of 5 by from simple shutter This perfectly matched an existing shutter on my house. easy to install.
Date published: 2016-08-23
Rated 5 out of 5 by from Exhaust shutter Better than pictured. Well made for price, ready to install.
Date published: 2016-09-21
Rated 5 out of 5 by from just as described just as described
Date published: 2017-01-18
Rated 4 out of 5 by from 20" Power Gable Vent Shutter This product is a fair product for the price. However, be aware that the rough opening for this product is 16.5" X 16.5" and not the 15.25" x 15.25 " stated in the product specifications that are listed on line. Also be aware that if there is any natural draft through this product that the louvers will open. This happens as they are not very heavy and only close by thier own weight and gravity. Any time there is a slight positve pressure on the back side of these louvers they will open.
Date published: 2009-05-27
Rated 4 out of 5 by from High quality, well-made item When my house was built, for whatever reason, the builders failed to include attic ventilation. I finally got around to doing it this year, and decided to go with this (the SGM 20) and the PG3X fan GAF mates it with. As you would expect from GAF, it's well made and appears to be durable. It's about as heavy duty as a pound of aluminum can be made to be. I have every confidence that the vent itself will outlast the house. However.... The instructions that are printed with low-res ink on the outside of the box are perhaps the worst set of directions I have ever encountered anywhere. Doing a retro-install of this gable vent is no different technically than putting a window into an existing wall. You build an outer frame that spans from stud to stud, then put an inner frame inside sized to the rough opening of the vent itself. If you decide to put one of these in and have never done anything like this, buy the vent (don't know how it could be any better) and either read online how to retro fit (plenty of material out there), or better still, get help from someone who knows about framing. Do yourself a favor and don't even look at GAF's instructions. I would have given the vent itself 5 stars, except I penalized them 1 star for the time I wasted trying to figure out what their directions mean.
Date published: 2011-06-06
Rated 5 out of 5 by from Do It Yourself! Easy to install, First timers would have no problem with the installation,Great installation instructions, No Plastic!
Date published: 2016-04-26
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