Rated 4.5 out of 5 by 14
Rated 2.0 out of 5.0 by bobb Installation difficult due to screen problem
I don't like to give negative ratings, but this product deserves it. The package was bent by the delivering agent, and the metal screen at the top of the vent used to keep birds and other pests out was bent. Took over two hours to repair so the blades would turn as product was poorly made. Easy to install if the screen had not been bent. Took the top off and straightened, but then when I put it back on, the screen compressed causing the same problem. Finally had to cut out some of the screen to get the blades to turn. Too much work.
July 19, 2016
Rated 5.0 out of 5.0 by RickATL Surprisingly quiet and moves a lot of air
I bought this unit only for the motor, fan blades, and inner assembly. I needed to replace a twenty year old fan that was screeching and finally died. This unit was of nearly identical diameter. The depth was a couple of inches greater due to the more powerful, larger motor but it still fit well in the existing housing. What a difference this fan made! Even when our old attic fan worked, it wasn't all that effective. It was about 750 CFM, which was marginal for our 1500 square foot attic in the hot and humid Georgia summer. This Master Flow 1250 CFM fan increased our air flow by 67% and it gets the job done. We set it in 105 degrees, the temperature recommended in the installation materials. Our experience is that during the hottest, most humid part of the summer, it will switch on around noon and run mostly continuously until about 6 pm to keep things at 105 or lower. Still, that's during the absolute worst heat, and managing to drop the attic from 130 to 140 degrees down to 105 is well worth it. It's achieving good air pull through the gables on the sides of the attic. Best of all, the fan is very quiet for one with a relatively powerful motor. With the attic door shut, I can barely hear it going in the hallway under the door. Once I walk into one of the adjacent rooms, I cannot hear it at all. No problems with vibration sounds so far. The fan appears to be well made. Overall, this purchase was worth the price.
June 30, 2016
Rated 5.0 out of 5.0 by Pigeon "Peace of Mind"
I had this installed by a professional but according to him, everything was included and the instructions and installation went without a hitch. My old fan was only a 12", not only old but was not doing it's job. The new fan gives me peace of mind that it works when it is needed and I do not have to keep checking the attic.
August 11, 2015
Rated 5.0 out of 5.0 by TexMex Does what it was advertised to do!
The fan is quite compared to previous models. In 20 years this is my 3rd power roof mount vent.
May 5, 2016
Rated 5.0 out of 5.0 by DIYer NIce replacement for an older Master Flow fan.
Replaced 10yr old Master Flow fan with this one. Thermostat working good so far. Have not been through the grueling desert summer yet but so far happy with this purchase. Replaced it myself and used a tub of roof sealant underneath base.
March 14, 2016
Rated 5.0 out of 5.0 by junior simple to install and wire, great air flow
simple to install and easily wired in. the air flow wasgreat
January 19, 2016
Rated 5.0 out of 5.0 by sparky nice product for the money
easy to install, good instructions, works exactly how its suppose to
October 3, 2015
Rated 5.0 out of 5.0 by Cesar Great fan
The fan works great and was pretty easy to install. The box comes with a template, so much easier to cut the hole. It's quiet and works great. I had issues with asphalt smell after a new roof and this really helped! Also helped with the heat buildup. Only negative part is it only came in black.
August 25, 2015