Inline Duct Fan, 8-Inch 807 CFM with Temperature Humidity Controller, Quiet EC-Motor Ventilation Exhaust Fan for Cooling Booster, Grow Tents, Hydroponics

I purchased this 4" duct fan to be used as a ventilation fan in the attic of a second story room above a garage. I am going to be using the room as a gaming/man cave room and wanted a ventilation fan that I could adjust the speed of the fan and be unnoticeable when in the room. This fan works perfectly for the limited space I had to install it in and with the asthetically pleasing LCD controller, this fan met all criteria I had and then some. It gives accurate readings of the air temperature and humidity %. It also, of course, controls the fan speed with 10 program or manually selected speeds. On the lower speeds, the fan virtually cannot be heard which is exactly what I wanted. The higher speeds are noticably louder for obvious reasons but it really moves some air which is the whole purpose of this fan. It has been running continuously for a month now and works flawlessly. Overall, excellent choice for a variable speed duct fan with all the bells and whistles and the best part is, it's a fraction of the cost of similar type fans.

Excellent. Easy to install and really boosts air flow to back room. Temp/ humidity probe works great. Good instructions.

I recently added the VEVOR Inline Duct Fan to my hydroponic setup, and I’m impressed with its performance. The 4-inch fan delivers an impressive 205 CFM, providing strong airflow that keeps my grow tent well-ventilated. It runs quietly, which is essential for my indoor environment, allowing me to focus on my plants without distractions. The integrated temperature and humidity controller is a nice feature, helping me maintain optimal conditions for my plants. It’s straightforward to set up, and having this control makes a big difference in ensuring my plants thrive. However, there are a couple of areas for improvement. While the fan is powerful, I found the controller’s sensitivity could be better calibrated; sometimes, it seems to react slowly to changes in temperature and humidity. Additionally, the fan could be a bit tricky to install in tight spaces due to its design. Overall, the VEVOR Inline Duct Fan is a solid choice for anyone looking to enhance ventilation in their grow tent or hydroponic system. Just be prepared to fine-tune the controller settings for the best results!

I'm a Vevor fan through and through, and I own both the 6inch and 8 inch and let me tell you... the 8inch is ridiculously louder compared to the 6inch fan... the only time its in "whisper" mode is in low speed settings, which anything is quiet if it moves slow enough... on high speed sitting 3 feet away its around the 75db average. I couldn't figure out why I was starting to get more headaches after this was installed, so I went 3 days without it, then back and forth, and everyday I had this running on high my headache came back. I mean don't get me wrong, its a nice product, its not overly expensive and its Vevor quality so its going to be reliable. I'm just not a fan of false information...

I have only been using this fan (8 inch w/ controller) for a few days so this is an initial impression. For those interested, read on later for tests that I conducted. The fan comes with a controller and a temperature and relative humidity sensor. The fan alone WILL run without any of these hooked up, but it will be at full speed. The amazing part is the controller that will allow the fan to be run at ten different speed settings. It appears to draw a lot less current than the fan I replaced, although that was 10 years old or so, and it runs quieter even though it moves the air 12% faster than the old one. It also can be run with only the controller attached but not the T/RH sensor, so unless you need to have it turned on/off at specific T or RH settings, it does not need to be hooked up. I can't imagine buying the model without the controller, which is nearly the same price. Following is the technical information. Speed setting 10 - full: 67 watts, 2800 ft/min (all readings are at no load/resistance right at the fan outlet. Ducting friction will reduce the air flow. For my situation with 3-90 degree elbows and 50 feet of flexible spiral ducting, the outlet is 1600 f/m at the 10 setting); 9: 57 w, 2500 f/m (89% of full speed); 8: 47 w, 2300 f/m, 82%; 7: 41 w, 2200 f/m, 79%; 6: 35 w, 2000 f/m, 71%; 5: 29 w, 1900 f/m, 68%; 4: 24 w, 1800 f/m, 64%; 3: 19 w, 1600 f/m, 57%; 2: 12 w, 1350 f/m, 48%; 1: 6 w, 1000 f/m, 36%. For comparison, another fan I have with a variable speed L to H controller, the lowest speed is 73% of the maximum. If you want a wider range of speeds available, particularly at the slower end, this fan is a fantastic option at an unbelievably low price. I have already ordered several others. Even if it fails in a year or two of nearly continuous use, it is still a great value.

This fan blew me away. I was making a cooling system for my laptop and wanted to run a 4 inch hose trgough the desk to the underside of my laptop. I purchased a random4 inch fan that was not very good so I decided to go larger. I happened to see this fan on sale and thought it may be too good to be true. Well it is not, i was going to go 6 inches but the 8 inch was less than other 6 inch fans so I bought one. The first time I turned this fan on I actually thought my laptop would lift off the desk. I coul only laugh at the amout of overkill for my needs I got. But hey overkill can be good. The little control unit that comes with it is a little chunky when trying to navigate but i like the fact its lit up and you can read it in a dark room. Tge speeds range from 1 to 10 and each one is a clear and progressively higher step in fan speed. I put a 6 inch reducer on my since I had 6 inch ducts alreadynand it was only going two feet from being mounted on my the underside of my desk through the desk to a cistom duct holder and stand for my laptop. I use a custom filter to try and minimize the dust being pumped into the laptop vents. It works really well and i never have to turn it up past 4 and it moves a lot of air. This fan is worth every pennyand it moves so much air that I buy a second one for my den to circulate the ac cool air since i only have one vent in a very large room.. Short answer is this fan is powerful and moves a ton of air!!! You will not regret your purchase and sometimes it half the price of other less powerful fans. I paid 25 percent more than what i paid for my 4 inch fan that wont even blow a piece of paper. The fan can get louder at around the 7-10 range but i was surprised at the quietness in relation to the amout of air being passed through. Over good fan!

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.

No problems, better quality than I was expecting for the price I really like the temperature and humidity controller.

Fino ad ora si è comportato bene, potente come descritto (807 cfm sono circa 22.850 litri/minuto) quindi assicura un ricambio d'aria anche in ambienti grandi, comodo lo schermo per la regolazione che si può installare ad una certa distanza dal motore ad esempio più in basso, alla massima velocità è rumoroso (è normale per un ventilatore in linea/a tubo di dimensioni ridotte) ma a velocità inferiori inizia ad essere silenzioso.

Très bien pour le prix Qualité correcte

I bought this fan to replace an age old extractor fan in my attic space, removing moisture from the bathroom. The extraction power feels twice to three times as powerful which is exactly what I needed. Installation is easy I cut the plug off and put it into an isolator linked to the pull string switch. The controller is nifty, easy to use. The only feature I can't see in the controller is the option to have a trickle speed at certain temps, it's either on or off at the desired speed. For what I need though it's ideal. I just need to get a roof tile vent now to compete the job.

I received the inline fan very quickly, thanks for that. However when testing the fan I soon found out that the so called controller actually does not do well what it should do, it is advertised that it can be used well in a grow tent but unfortunately this is not going to work as it should. This fan controller that comes with it is actually nothing more than a temperature gauge with a termostat. There is nothing really adjustable in the thing just regulates on or off at a specified value. It should go to a low setting when the temperature is right in the grow room but it doesn't, it goes off. You don't want this in a grow room, you should always have negative pressure/fresh air in connection with odors etc. This fan looks nice with a nice controller but for growing purposes it is worthless, do not be fooled by the nice movies on youtube about this fan which is also sold under many other brand names but are all identical! I find it a pity because the service speed of this shop is fantastic but I feel cheated by the product. The fan is not broken, it just does not work as promised. This one is going back. I will buy a more expensive fan with a real controller.

Ottimo estrattore, acquistato per problemi di muffa nell’abitazione, presenta diversi livelli di potenza di aspirazione, silenzioso con quelli più bassi più rumoroso ma con alta potenza di aspirazione con quelli più alti, il secondo livello basta per far circolare l’aria nell’abitazione, presenta anche programmi per l’accensione e spegnimento automatico in base ai livelli di umidità e calore o accensione manuale con comandi da muro e schermo retroilluminato con i dati in tempo reale dati dalla sonda. Consigliato.