KEN BROWN 24 Inch Shutter Exhaust Fan with Speed Controller, 4200CFM High Speed, Wall Mounted Vent Fan for Garage, Attic, Greenhouse, Shed, Shop, Barn, Workshop, Includes 1.65M Power Cord

Works great pull the hat off your head..

Works good, I added a thermostat and it goes on and off by itself in the attic

I installed the fan in my wood shop. I really like the engineering effort that was put into the manufacture. The frame is so rigid you would have to work pretty hard to twist it out of alignment. The louvers work easily and close tightly. The fan guard is also the mounting for the fan motor and the guard is isolated from the frame with rubber grommets and that setup works really good- you can put one hand on the guard and the other on the frame and there's essentially no vibration transmitted to the frame at any speed. The fan blade seems well balanced although I would have preferred a stiff steel fan blade to cut down on the harmonics when the fan is running wide open. But steel fan blades are hard to find nowadays. Just a sign of the times I guess. So I'm knocking off one star for the noise at high speed. But I find if I run it at a moderate speed it's plenty quiet. One more thing and in retrospect it's probably overkill but I used 1/4" lag bolts and 1-1/2" fender washers over wide rubber bushings to mount the fan frame to my studs. You get to decide, but I consider it cheap insurance against vibration transmitting to the wall.

I plugged the fan speed controller into a thermostat control bought here on Amazon. You need to have vents for air to to come in. I closed the doors of the storage building and turned it up until the fan started to cavitate and then slowed it down. I added a gable end vent on opposite end of building and then I could speed it up some. This fan moves a lot of air and is surprising quiet up to 3/4 throttle if it is not cavitating.

Easy to install, have in in our girls coop to withdraw the excessive heat...well worth the money.

This is a fantastic Exhaust Fan... I have the Speed controller installed and all works great! However, when I received the fan there were some of the spot welds that hold the grill in place that had broken... likely during shipping. I contacted customer service thinking they might give me a diy or discount if I keep it... Instead the company said that if I like just go ahead and keep it and we will re-reimburse you 100% which is what I did. I simply fastened some washers in the right places and its all working great! I am giving 5 stars because its a great fan and a great customer service company!

This works well and the speed control is more than effective enough. Power use is fairly linear with the control, so if you slow the fan down it really does use considerably less power. The louvers are flimsy, but I don't care because they just cut off some of the air flow anyway and my exhaust port is nicely isolated from weather and bugs. The only real nock? It's loud. Much more noisy than I expected, so be ready for that. Some sound isolation and it's tolerable, but ya know?

This works great to move air in the barn for the sheep.