TOPHORT Inline Duct fan 4 inch with Temperature Controller Booster Duct Fan Speed Controllable Exhaust Fan for Grow Tent/Hydroponics/Air Exhaust/Ventilation

Had for just 2 months and the thing stopped working. No one from Amazon will help or the company itself. And the thing that sucks is I was a couple days past return date I will never buy this or anything else sold by this company and suggest that no one else dose either

This is our second one of these fans. First one worked so much better than the competitor brand so we replaced it. We have both running in a small bedroom and while there's fan noise, it's just that. There's no rattling or vibration noises. The room is warm but not hot. We tried to use the temperature control early on but it's not necessary now anyway. This was a great purchase and highly recommend.

The fan size and temperature options is fantastic. The noise level maybe as advertised, but the noise it produces is an annoying drone tone. I use it to reduce the temperature in my solar battery closet, it works great. If you plan on buying this item, it’s constantly running on your selected speed, and the temperature feature manages the high speed. I didn’t need the fan on constantly, so I selected the slow speed, found the slow speed input wire and disconnected and capped the wire for safety. This allows the fan to run solely on temperature control.

Its a quality product that works as intended it is very efficient and definitely moves air I've been running it 24/7 for the last 4 months and not one issue. Its temperature control works perfectly the fan never turns off on it's own but when the temperature rises above the set temp it kicks in to high gear and cools it down quickly then returns to the low setting.

This product never shuts off just slows down fan at temperature. Plus knob was flopping around in box. I put round knob back on and have to get perfect to even work. I was going to need two more but wont after this. Fan and body seams metal and why I want this. I just got this and all kinds of issues.

For the money, this could have been designed better. Runs continually. Got lots of electricity?

Everything was more than satisfactory. This was used to blow heat to upstairs.

The temp control.. its a little louder than expected compared to my other fans but works great