VIVOSUN 6" Inline Fan 240 CFM, Exhaust Fan for Home

Mine has gotten intermittent use since 2017. I just looked inside and cleaned out the dust and dirt. I hooked it up to a dimmer and it seems to work great. My only criticism is that it's loud, but if you just need good air flow, it gets very quiet with the dimmer. Good job Vivosun

We have a circa 2000-2004 Dynamic Cooking Systems Professional Vent Hood that has a very loud (75 dB) 600 CFM blower for our six burner stove (about as loud as a vacuum cleaner). It's so loud, we avoid using it. I could find nothing about replacing just the blower (would have to replace the whole range hood, and for what we have, they range $500 to $1,500 plus installation). And my guess is, if you want a quiet blower, it's at the $1,500 end. The range hood vents to outside just a few feet away and we were limited to 6 or 7 inch diameter. This inline 240 CFM is a vast improvement at about 65 dB (normal conversation level, like a window A/C without the compressor being on), which is about 1/2 the noise level as 75 dB. Had to buy two 7" to 6" reducer duct for it to fit the 7 inch duct ($20) plus switch to control it. Obviously, it is not as powerful as a 600 CFM fan, wished they made a 7 inch fan as I am sure it would be a little more powerful, but burning a piece of paper showed it draws the smoke right down to the burners. Besides 600 CFM was not working when you don't use it because it was too loud. Please note - this was noticeably quieter before I installed it as the metal range hood does amplify the sound a bit (could easily be quieter in other applications).

I purchased one of each size (4"6" & 8") I was using them to circulate air in and out of my 2'x4' grow tent but they are far to loud. I repurposed the 4" to bring air into my 30"x18" grow tent and I'll see how that goes. I also purchased the Vivosun 6" mixed flow fan and am very happy with it. The 4" and 6" mixed flow fan are about the same db level but the mixed flow moves much more air.

Using this blower to move air through residential duct work to farthest room from HVAC. It has lasted for 3 years running 24/7 and makes that room temperature consistent with rest of the home. It is fairly quiet, but can still hear when running it (sounds like low level of white noise). Combined this with a pressure sensor at end of the main return trunk from HVAC and works like a charm. Strong buy recommendation!

I use this to extract heat from a portable A/C unit. I needed a fan with metallic blades due to heat. The heat it is exposed to will warp plastic fan blades. I was worried about the fan motor’s exposure to heat as well. This fan (in my application) is exposed to 145 degree internal duct heat for hours at a time which is right at the end of the motor’s advertised tolerance. It has been working without issues for over two months in Florida weather. I run it for as long as 6 hours straight, as needed. I use this fan to extract exhaust heat from a portable 9000 BTU A/C unit in my garage. This unit may also have use in a hurricane aftermath scenario (as in cooling a tent erected inside the house for sleeping (powered by a gas generator located OUTSIDE), if the power is out for weeks. This fan is hard mounted to a plate which I fabricated which seals the window opening completely. It can be removed from the window in less than 30 seconds. It also locks the window to help avoid entry from outside. I insulated the original flex duct with commercial grade insulation material used for A/C ducts in attics. The portable A/C unit is connected to the insulated duct, and then to this fan assembly at the window plate on the other end. The straight 4 foot duct run has two 45° elbows... this fan creates a vacuum in the duct to draw the heat outside better than the A/C u it could before. These portable A/C units are completely useless unless you facilitate the extraction of the heated air they produce. The uninsulated plastic exhaust ductwork they come with simply transfers all the heat the create right back into the room before it gets outside. It’s so hot in fact, it melts and distorts the window mount that comes with the A/C unit, allowing the heated air to literally blow back into the space you are trying to cool! It would heat and cool the garage simultaneously. Incredibly stupid and costly. To remedy, I insulated the exhaust duct from the A/C unit all the way up the the fan (at the window plate) in order to keep the heat in the duct, and not let it radiate back into the garage airspace. This fan sucks the hot air out. The window/fan mounting plate is made of 3/8 finish grade plywood, and painted with a two part epoxy, as to be waterproof and look nice. The fan is mounted to the plywood with a metal ring I fabricated using rivets, and it seals with a gasket. Control of the fan is manual, via the same power strip that supplies the A/C unit. The sound level is lower than the A/C unit’s noise output. The result: My garage can now reach 78°, with a 50% humidity level on a July day like today. Without the AC, the garage is 85% humidity, and 95°F.

Way too loud for my liking. I should have fired it up before installing it but all in all I let it run for like 7 mins before taking it out. Muuuch too loud for HVAC supply ducts. Probably fine for a grow tent but still loud.

It's louder than my box fan BUT it is no longer hot upstairs. Good trade off in my opinion. I don't need to supplement my HVAC with air conditioners anymore which were also loud but worse they shut off and on all night. At least this fan is a constant sound. I only plan to use this product on really hot or cold days to help my HVAC reach upstairs. It was over 100 yesterday but upstairs was comfortable without using window air conditioners. I have it plugged into a timer so I don't have to go in the basement to turn it off and on. It turns on 2 hours before bed and runs all night. I am happy with it, a VERY cheap way to help boost the HVAC on these hot days. My electric bill last month was higher than Snoop Dogg, I know this months bill will be much nicer without the extra air conditioners and box fans running. I look forward to the boost this winter too, Michigan winter's can be brutal!

Works very good. I initially bought the 4" which didn't really do anything at all, the fan in my fridge blows more air. However, after its demise(Vivosun was very easy to contact, quick reply and took care of it), I ordered this one, the 6 inch, which has at least 6 times the airflow of the 4" The only noise I hear is the air moving- which isn't loud, Can't really fault a product for the sound of air "whooshing". No rattling or anything as of now, I highly recommend not even trying to 4", a simple breeze outside can push air into the room with the fan on. everything about this is good quality, and lightweight. The cord is nice quality, as well as the item itself. I use this in a Room for an Exhaust, attached to a Flange that sucks air from overtop my "workstation". Does this Wonderfully. This may sound stupid, But I also used a "vaporizer" to blow "vapor" into the room( not necessarily toward the fan) and it caught all that and cleared the room within seconds. At the end of the day i am happy with my purchase, and has helped TONS with what i needed. I wouldn't hesitate to buy it again.

Hace ruidoo

This works excellently as an exhaust ventilation fan. It is powerful enough that it pulls the tent walls in very well, so it definitely moves a good amount of air. It is not terribly quiet, but it is also very powerful, so that is the trade-off. There is no built-in timer, but I used it with a smart outlet when I wanted to give it a break now and then. Recently, I have had it running pretty much nonstop for the last few weeks with no issues. Overall, I would highly recommend it if you need a strong inline duct fan for ventilation.

We are not satisfication this product

I ordered two of these for air exchanger motors inline to the already installed ducting in my house. The replacement motors were $250 each so I ordered these to put inline to draw the air from the existing setup through the air exchanger system. I removed the old damaged motors and cleaned the air exchanger as normal, then mated the inline fans with the Growneer variable speed controller to the ducting. I have the variable speed to control seasonal or heavy humidity use and this setup works perfectly plus is no louder than the original setup. These fans draw the air as well as the originals and I can adjust them accordingly with the Growneer It allowed me to fix the system at a fraction of the price and even if I have a fan failure, I can replace it easily for pennies to the dollar of the original motors. They are even far easier to get at. For the price, it's worth the experiment for durability, I can always buy more heavier duty fans if needed but right now, things are looking, and working, very, very well. Super pleased!

This fan is good and removes enough air for my 3x3x6 tent, enough to give me some negative air pressure when tent is closed up. Have not noticed any grinding noise from the fan as some have reported yet. For longevity of the fan it's best to mount horizontally and not at an angle as this could cause some uneven wear on the motor. The fan was loud before hooking up a long enough duct which has silenced it considerably(sounds like a bathroom fan on low). This fan is great for the money and if you do not need to run carbon filter or speed controllers.