VEVOR Inline Duct Fan, 4-Inch 200 CFM with Variable Speed Controller, Quiet AC-Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

I bought this for my main, full bathroom in a custom down vent set up. Works great and is quiet, even on full.... No more walking out of the bathroom like a WWE entrance.

Bought this to pump air through a filter unit in a chicken coop. It works well enough that I am often cleaning the actual vent I installed because it’s getting clogged! I wasn’t sure it was strong enough, but the amount of dust and dander that’s getting sucked through says otherwise. There’s definitely a sound to it, I wouldn’t call it loud, but it’s louder than you’d think it would be. Great price. Very sturdy item. So far, no complaints.

Helps pull alot of the smell and smoke out while using my laser

Use the fan to ventilate radon from my basement/home. The speed of the fan is variable. The fan is quiet. I use a clothes dryer, vent hose to move the air from the duct fan to outside. The unit has been in use for a year with no issues. Radon concentration dropped from approximately 12 pCI/l to approximately 2 pCI/l over a period of several weeks. The EPA suggests the radon concentration in air should be less than 4 pCI/l.

Ive went through 5 different kind of duct fans these past couple months and I ended up ordering this one because it looked sturdy. This thing is built extremely tough and isnt very loud . It has a speed controller and is absolutely worth the money . I actually tried to send this one back because it wouldn't fit in my duct I was trying to put it in and the company refunded my money and just told me to keep it. So obviously their customer service is 10/10 . Ill use this one on my next project

I bought this to use as an exhaust fan for my laser engraver. I've had it for well over a year now. It still works great and does the job nicely. I would definitely buy it again!

Works good. Takes most of the smoke out. Some still escapes the last but that's not the fans fault

Loud, very loud and controller is not working , it stays 1 speed only. Pass it, i just ordered terrabloom. Lets see how it will be

Good item, works very well. It came quicker than stated which was good. Seller was very helpful, they kept me up to date all the time and were very friendly, i highly recommend.

DO NOT BUY! Don't ignore the other reviews stating its loud.. They are accurate. The variable speed doesn't seem to work at all and the unit emits a concerning electrical buzz while operating. absolute trash product

Worked for 6 weeks before burning out in the controller—a seemingly known, dangerous fault. I had to pay return shipping and fight for a full refund under consumer law. They only gave in when Amazon got involved.

Device controller heats up when not in use a replacement was sent and the replacement has exactly the same fault