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

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.

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.

Meet the requirement what I expected and running OK now

Relatively quiet, but doesn't move a whole lot of air. It works for assisting the smaller ventilation fan in my gallon laser, but may end up being swapped with somethingmore powerful in the future if I don't go to a different laser.Had for a little over a year now, and while it hasn't had any issues, it's performance isn't exactly astounding. Couldn't quite give it 3 stars, so 4 it is.

Great blower. Comes with what you need to get a basic setup. I am currently using it to hold a slight vacuum inside a 3D printer enclosure and vent to outside when printing. On it's lowest setting it moves plenty of air to pull fumes out and allow printing in my office. I smell absolutely nothing in my office now. Not sure how it compares to others, but so far have no complaints.

This product is described as an exhaust fan, but it leaks air from the housing, allowing smoke to enter the room! This is extremely unsafe as it will not send all of the air to the outside. Do not use as an exhaust fan!

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

Can be used to replace 4 inch inline ducting fan for bathroom exhaust fan

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.

es bueno solo que si requieren para extraer de un lugar amplio este no lo recomiendo ya que es pequeño, pero para algo pequeño funciona.

Parece-me bem. Ainda não testei mas assim que instalar irei dar feedback. Será para uma extração do wc. Face a outros mais caros não parece ficar nada atrás!

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

barulho muito acima do esperado. ruido constante de funcionamento do motor eletrico. decidi trocar para ver se era defeito do equipamento ou se é mesmo assim. se for assim, não cumpre com os 29db que anuncia. medi mais de 60db e não é pela força do ar mas sim pelo ruido do motor eletrico.