VIVOSUN R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation

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!

tiene buena potencia, sonido no es tan fuerte, buen succión, funciona perfecto para extraes olores de máquina grabado laser de fibra

*Updated Review*After my initial review (see below), Vivosun contacted me and offered to send a free replacement. I took them up on their offer to give it another try. I did order a replacement fan that is super quiet and works great after this try, which is what I had been using. However, I was willing to give this one a try to see if maybe I did just get a bum unit.I got the new unit and plugged it in. It's definitely not as whiny as the original one, but still quite a bit louder than the other one I got (AC Cloudline Infinity). That one is also 2x the cost, but if you need silence is worth it.Overall I think this one is OK if you're on a budget and don't mind a little noise. If you have the coin and need things as quite as possible - look elsewhere.I did update from 1 star to 4 stars because of how well the customer service has been. This is still, at best, a 3 star product compared to other options.I set up a grow tent this year for starting seeds indoors before transplanting into the garden. I wanted an exhaust fan to be able to vent in fresh air to ensure air flow and good photosynthesis. I purchased a Vivosun tent and was generally satisfied, so purchased this fan to go with it.I received it and everything seemed pretty high quality at first glance. I got it installed and turned it on only to be greeted by this awful, loud, high pitched whine. Didn't matter the setting, didn't matter if it was connected to the filter, consistent loud whine.To its credit, it did seem like it moved a decent amount of air. If I had this out in a shop or in an attic it would probably be fine. But for indoors in a house, absolutely not. No way I could work from home with this torturous, piercing sound in the background.I ended up returning it and replaced it with an AC Infinity Cloudline fan. That fan w/o the filter was as much as this combo, but it's dead silent.Not sure if I got a defective one, or if that's just a price you pay for this cheaper version. But if silence matters, spend the coin for a better one.

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 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.

I bought this fan to suck the air off of my fiber laser when engraving things such as plastic or wood. This fan really has some suction. There have been times when it has sucked a piece of paper from across my desk into it! I highly recommend this product if you need a compact way to move large volumes of air! Not to mention this thing is incredibly quiet!

Good: The fan moves a LOT of air.Not so good: The fan is LOUD. The noise measures 73 decibels at 3 feet, which is hundreds of times more sound energy than claimed in the description. (The decibel scale is logarithmic.) This was no surprise to an engineer, since any device moving that much air through such a small opening simply has to make a lot of noise. Just be aware of what you are getting.

So many reviews complaining about it being too loud but if i have mine turned on max its no louder than the small circular fan i have in my 2x4 grow tent. Took care of the smell completely. Great for the price