VIVOSUNVentilation Kit 4 Inch 190 CFM Inline Duct Fan with 4"x 12" Carbon Filter Odor Control System with Australia Virgin Charcoal for Grow Tent Ventilation

So, I'm using this fan as part of my custom built ventilation system in my basement room converted to a cigar room. I use it to suck the cigar smoke out through the window via the 6 inch hose and some ducting that goes out. I use it in conjunction with a duct fan that's hooked onto the HVAC ducting that acts as an intake fan for the same room.What I like.1. The speed controller comes attached. No need to purchase one separately.2. Durable. I had a mishap where I accidentally dropped it from 7 feet to a concrete floor. No problems, turned it on and fired right up. It's plastic on the outside, but the fan itself has some good heft to it.3. Powerful. This thing cleans out a room fast. You can watch the smoke going from the cigar a good distance away in the room as it goes right to the area of the fan.What I don't like:1. This thing is loud. But, that's the compromise. If you want a proper fan that will do the job, noise will be on the table. That all said, it's not loud enough to drown out conversation or music on a small speaker in the room. Further, it's powerful enough to run on low and still keep the room clear with one or two cigar smokers.In all, this being part of my ventilation system saved me hundreds of dollars by not buying a rabbit, or any other overpriced smoke eater. Good price, quality fan.

I hooked this up to my laser enclosure with 4-to-6 inch adapters. This moves a lot of air so no, it's not extremely quiet. But when the laser is running and its tiny high speed fans fire up, they completely drown out this fan. And this fan is quieter than the air filter I had been using. I needed more air flow so I'm skipping the filter and just piping the air straight out a basement window.

Got this as a way to pump smoke from my laser engraver out of the workshop. Its nice and moves air pretty quickly. I have no problem working with the doors shut anymore. The only problem I had was getting the host attached the unit, as there is no lip and the hose kept slipping off. Fan is very quiet and does the job.

I’m thoroughly impressed with the VIVOSUN Variable Speed Inline Duct Fan! From the moment I set it up, it was clear that this fan is built for performance. The brushless motor and durable plastic blades make it not only efficient but also incredibly quiet—at 34 dB, it’s nearly silent while running. Whether you're using it in an industrial, household, or horticultural setting, it delivers optimal airflow, reaching up to 390 CFM.One feature I love is the stepless speed controller on the power cord. It gives me full control to adjust the airflow and noise level, so I can tailor it to my needs. The compact design (measuring only 8.7 x 11.8 x 8.7 inches) fits perfectly into tight spaces, and installation was a breeze thanks to the included bracket and removable duct ends.This fan is incredibly versatile and does the job exceptionally well. If you're looking for a reliable, efficient, and quiet ventilation solution, I highly recommend this product. It’s the perfect addition to any ventilation system!

I bought this for an exhaust system in my garage. It is not that loud and works great. You can hold your hand by the intake duct (not the fan) and feel the air being sucked through like a giant vacuum.

I purchased the blower to boost A/C air flow to my upstairs bedroom. instead of putting it in the duct, I simply put it in my bedroom to pull the air. Even though the house has 6" ducts, I purchased the 8" blower to move more air. and it does move the air. I considered buying a second A/C for my bedroom, but this was a cheaper solution and probably better than running a smaller less efficient A/C. I have it on a temp control switch and it works great.I used to have to set the first floor to 68 degrees to get my bedroom to 74. I HATED freezing all summer only to allow my wife to sleep at night. Now, it keeps my bedroom 1-2 degrees cooler than the first floor. it's awesome.However, it is loud. Very loud. Painfully loud. Even at the lowest setting it's loud. it's impossible to keep it on when I'm in the room. Even when I'm downstairs, it's loud--although you only really notice how loud when it turns off, and you can enjoy the quiet.Fortunately, cools my bedroom off so well, that when I retire, I simply turn it off for the night.

My first inline fan I bought and has help up perfect!!! It's not silent but i wasn't expecting it to be super quiet. Still not bad especially for the price I'll be upgrading to the new ones soon, but this one is still in new condition.