iLIVING ILG8SF24V T 24 inch Shutter Exhaust Attic Garage Grow Ventilation Fan with 2 Speed Thermostat 6 Foot Long 3 Plugs Cord 24 Variable Silver 24 - Variable Speed

Works well in 20’ x 50’ x 20’ tall enclosed barn. The variable speed and thermostat control features work good. You’ll need intake air source if structure is fully enclosed.

This fan works better than I could have ever dreamed. It took all of the heat out of our attic within about 3 minutes of turning it on. I put on an IOT and it hooked to our wifi and I can turn it on and off using the app. Very happy with the performance of this fan. It moves a lot of air very fast.

Works for what I needed takes the heat out of the garage

Installed in the top end wall of my greenhouse. Louvers work to keep out bugs. Love the 2 speed fan option. Had a light switch installed so I don't have to drag a ladder around to turn it on. Quiet motor. The only noise is one louver rattles on the connecting bar when in operation.

I replaced a 16 inch fan with this, and I am very glad I did. At medium speed, it moves a lot of hot air in my greenhouse. I ordered the fan with a thermostat, but, like other reviews, I ended up using a separate temp control as the internal unit got a bit weird and I would find it running when the heat was on.( The problem was more due to the thermostat being so high up that the hot air from the boiler was triggering it). I have only had this for a month or two, so I can't attest to it's longevity. But, so far it works as it should.