iPower 20 Inch Wall Mounted Shutter Exhaust Fan, Aluminum, 1200 RPM, 3368 CFM, for Attic, Garage, Louvered Vent, Plant, Greenhouse, Silver

Works wonderful in our barn. It is very powerful! You can feel it move the air. It is also quiet.

Originally bought a 14" exhaust fan. Simply was not big enough for 10 x 12 harbor freight greenhouse. I bought the 20.6 x 20.8 inch shutter exhaust fan not certain it would fit. It just fit between the aluminum framing on our 10 x 12 harbor freight greenhouse. I actually like how it fits. I used some left over 1" aluminum angle stock and stainless-steel bolts to attach it. Also used silicon to seal around it. Very sturdy installation. Greenhouse is reinforced with 2x4's and 4x4's. Not sure I would install this fan without some type of reinforcement. With 50% shade cloth, this fan was able to keep the greenhouse below 100 deg F during hot days of Michigan summer. We bought the temperature controller separate. As other reviewers have indicated, the plastic coating on the louvers is pretty much permanent. I would not recommend attempting to remove it. The coating does not affect function and the blue color doesn't bother me a bit.

It came in yesterday, ad I got right to it. Install was easy enough. It works just fine and moves a lot of air. The blue film on the louvers was difficult to remove and resulted in bending some of them. Otherwise, it would have been 5 stars.

Replaced a older fan that just died. This one is much quieter than the one that it replaced. As others said the cord is too short and will need to be lengthened, I recommend 14ga wire to do this. Also may want to consider a automatic switch as I may add one at some point.

Perfect for air movement throughout my shop. Easy installation, I added a heavier electrical cord for the length run.

Reasonably quiete fan moves a lot of air. Comes with aluminum weatherproof shutter to keep insects out when fan is not running (they don’t stand a chance when fan is running). We installed in office over commercial kitchen that shares the space with condenser units for refrigeration.

Used in a 24’ by 24’ pole barn works great. I would buy again.

Could have been better balanced, so some vibration. Noise level medium, I didn't get the cord option but the cord it came with was very short so had to put a box very close to the fan motor to hard-wire it. Tip: removed the hard-to-remove plastic coverings on the louvers before installation since that crap was hard to remove. Poor packaging as anchors were just loose in the box. Louvers don't look very weather-proof. I added flashing above the frame which goes behind the siding on my workshop. Overall ok for the price.