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

I snagged this combo during the Prime Day deals to run on my 60w CO2 laser for smoke extraction. I had been using a 4" online fan with a step down adapter I 3d printed. It worked, but wasn't the. Greatest and certainly wasn't quiet.This usit with the control panel and sensor was a nice upgrade. Mind you, it's primarily plastic, time will tell how well it holds up, but for the price paid, it's a sound investment. I mounted it behind the laser on the cart I built for it, connected right up with the ducting (separate purchase, same brand) and ran without any problems. I was impressed with the airflow, but moreso the lack of noise. It's literally 30% quite or more than the old style in line fan I was using.I don't think it's worth what it normally runs when not on Prime Day or a lightning deal, but when it is at those prices, it's a solid purchase.

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!

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!

Very happy with the purchase. I added 2 of these in the ducts of rooms that get all day sun. On setting 2 of 10 is all it took to make an improvement. These 2 rooms are occupied (work from home offices) so we were over cooling the rest of the house just to get these rooms tolerable (due to lack of air flow). Now we should be much happier this summer.Sure there is some airflow sound from the vents but not from the motor it's self. Ease of installation will be your access to the duct and access to power.

I just got this fan a few days ago to replace a noisy relatively power hungry inline fan i already had. My first impressions are pretty good. I haven't installed the fan how I want yet, but I have messed around with it. First off, the description says it's 68 watts, I hooked it up to my kil-a-watt, and at maximum speed, it only draws 59-60 watts. So that is deffinately a bonus. While down at speed 2, it draws about 11 watts and still moves a decent amount of air. I do not have an anemometer or anything to verify flow rates. As far as noise, I haven't checked it with a decibel meter, but it's not the loudest fan in the world. Speed 2 you almost can't hear it, at 3 you start being able to because the Humm it creates is sort of a higher pitched Humm, not a deep lower tone. At speed 10, it gets kind of loud but not the loudest fan I've had. This review could possibly be premature, but overall I'm satisfied so far.