Customer Reviews for VEVOR Inline Duct Fan, 4-Inch 205 CFM Quiet EC-motor Ventilation Exhaust Fan, with Temperature Humidity Controller for Cooling Booster, Grow Tents, Hydroponics

Nice unit variable speed settings heat and humidity settings also will control multiple fans but only one settings "fans work as one"

I've had mine for a little bit now, it's inside my shed that has a large vacuum that when running produces lots of warmth from the motor. This 4 inch inline duct fan sucks out the heat perfectly.

I got this to use with my 40W Laser system. It does an awesome job removing the smoke from the enclosed work area of the laser.

exactly as advertised... strong and fairly quiet. fan parts are plastic but feel dependable.. i would purchase again

These fans are heavy duty and as good or better than the higher priced ac infinity fans. These do the same thing at a much lower cost. I'm recommending These fans to all the indoor grow tent flowering rooms.

Simply put, this inline duct fan seems to be as good as any of the competing brands, and makes one wonder why the others cost so much more. The only issue I had was a loud high-pitched whine that came from the controller box even when the fan was completely off. (Since the controller monitors temperature and humidity, it's never really \"off.\") Then I got around to plugging in the temperature sensor cable (which not all competitors provide or support), and the whine disappeared completely. I guess some circuitry was switching on and off to check temperature, and with no sensor it made an audible switching sound. In any case, this is a flexible controller and a fully functional fan, and I can't find any fault with it. And it has an anti-back-flow feature so outside air doesn't blow back into the duct when the fan is off. Mine is installed on the high-pressure side of the shop, and there's almost always prevailing wind against that side of the building, but no indication of any draft back through the fan. This can be very important, not only to prevent heat loss, but also to prevent possibly toxic dust and particulates that accumulate in the duct from being blown back inside. I will definitely pay attention to other products from Vevor.

This has been a great fan Best one so far that we have bought and we've checked out several different companies

Fan works well, blows/sucks a good amount of air. Fan temp controller also works fine, lots of options on when to turn the fan on/off. I wish it had the option to ramp up the speed over a temp range. To be fair you can set the speed it goes on to, but it won't raise the speed if your temp gets too far above the set temp. The fan has 10 speed options, but the auto on/off only can turn it on and off. It cannot adjust whatever preset speed you picked based on the temp.

Excellent, it's been running in my damp basement continuously for several days. Moving the moist air outside through my chimney vent of the same size diameter vent. My air quality in my basement has improved greatly, allowing me to work in the area.

This thing moves a lot of air. It is a little noisier than I hoped for but it's not a really big deal.