Rated 3.5 out of 5 by 13
Rated 5.0 out of 5.0 by Montana93 Do It Yourself!
Easy to install, First timers would have no problem with the installation,Great installation instructions, No Plastic!
April 26, 2016
Rated 4.0 out of 5.0 by toolman Great product...some concern
This is a great shutter for the money and it was easy to install; just use the template provided. If you're using a saws-all instead of a jigsaw you may want to add 1/4" to the all four sides. Once installed, the shutter performed flawlessly. I had to build the 20 x 20 inside frame laying flat instead of laying on edge, (as pictured in instructions), because I was installing on T1-11. But the frame, (either way), is a necessary step in order to have a solid back to screw louver on to; plus it helps to keep out roaches. Regarding the shutter and its design to open and self-close upon the outflow air from the fan, I'm concerned that a sudden updraft from a rain storm could cause it to open (I live in central Florida) but this is only a concern at this point and it has not happened. In the event of an approaching hurricane, I would suggest purchasing or having a custom built waterproof and wind resistant enclosure (on hand) to cover the shutter completely.
August 27, 2014
Rated 5.0 out of 5.0 by Godfollower Excellent Works Perfectly Looks Great!
I actually had someone install this for me because I am disabled but it works perfectly and looks fantastic and I believe is well made.
August 21, 2013
Rated 5.0 out of 5.0 by matt76 very nice
This item was super easy to install. Almost so easy I got confused thinking it couldn't be that easy. on the box is a cut out template. Tape it, level it, draw the lines, cut the wall, and screw the vent into place. That easy.
June 18, 2014
Rated 4.0 out of 5.0 by Bluefire 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.
May 27, 2009
Rated 1.0 out of 5.0 by KH34 Obnoxiously Loud Banging
I moved into a house 3 years ago with this vent and the GAF fan. The vent faces west and anytime any wind comes off the mountain this vent bangs. Interrupts sleeping and no easy replacement found to eliminate this issue. GAF needs to construct a similar one with noise-dampening. I have the same issue with the fan vent levers too. They now rattle and make a horrendous noise whenever I turn the fan on. Hardly ever use it due to the racket it makes.
March 23, 2012
Rated 1.0 out of 5.0 by OakHarborHomeOwner MasterFlow Gable Vent Worthless
I bought and installed this vent and a 1500 cfm attic fan. The louvers barely opened under full fan exhaust. The attic access panel was open and there was a direct air-flow from outside, so, there was absolutely no obstructions to the fan & vent operation. The louvers are just too heavy to be lifted by the fan
It is essentially worthless; a waste of money.
October 13, 2013
Rated 1.0 out of 5.0 by disapointed1two3four way undersized, cheap made, poor description
This advertises 20 inches and is only 16 and 1/4 inches for rough opening. Extremely over priced for what you get. My vent I was replacing was 24x24 and I planned to close the 4 inch gap with trim, Now that I see its 8 inches below size. A big disappointment when ordering a (20 inch) power gable vent shutter and (it is only 16 inches)
Sound's like a fisherman stretching his fish sizes.
August 30, 2012