VIVOSUN 6 Inch Inline Duct Fan 240 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

Works as described so far

Attached it to my industrial oven. Works great

The media could not be loaded. I was hoping for more air movement with this fan. I am using it for an exhaust system I made for my 3D printer and laser engraver. I put the fan upstream of the laser engraver thinking it would push all the air away from the 3d printer portion of the exhaust but unfortunately I still get smoke coming back into my printer. I don’t know if putting it down stream of the laser engraver would help. I guess I should try that.It is not loud at all, my guess, if people who said it’s loud have it maybe resting against something or it’s not balanced. I’ll upload the video of it off and on.

Pequeño pero justo lo que necesitaba, buen acabado y calidad aceptable. Mueve cantidad de aire aceptable para su tamaño. Justo 4 pulgadas, 100mm.

The media could not be loaded. At only 100 CFM, this fan isn't too bad. If 100 CFM is what you need. I was expecting more from the design, I guess.With adding an 8 gig video card to my recent computer build, the temps on my chip cooler sky rocket to around 104°F or 40°C on many games, from an average of around 82.4°F (28°C). Which isn't too bad really, but I want to add some filters for dust, & having 104°F pumping into the back room, makes it very hot on a summer day.So I searched around & found this, that I thought would be a solution. I figured it was better than a large Molex powered fan.What I wanted, was to remove the heat that the computer was pouring into the room, with a powerful fan & vent system. All of the air flow goes in the direction of the top vent, & out already. Now I want to pull it out of the room, to the window to the outside.The video card is loud enough on it's own (see review elsewhere), so adding filters to soften the sound, as well as a vent to pull the sound, should reduce it, along with the heat.I looked over Amazon & the net, & found this had the most "quiet sound". Quiet, being relative to the user, of course. Some reviews said it was loud (it is).As you can hear in the video, it is louder than the filtered & non filtered computer.Just to give you an idea. The computer has a twin active fan on the video card, A T-1 thermal tower for the CPU, a 120" side panel fan, & some case fans; on it's own it can be a little loud. Mostly it's the video card, as a simular tower build w/o the 8 gig video card can't be heard (see Black Ice Monster review).So, noise isn't winning any awards. The video is via my phone, not great, not bad. Gaming headset doesn't pick it up, as an FYI.The second & most important thing this Vivosun booster fan needs to do, is evacuate the heat from the computer, so that it doesn't enter the room. The third thing it needs to do (on this checklist), is keep the computer cool. Preferably below current temps, but with in an acceptable range, as long as it's evacuating the room.So far, it's doing #2 alright.Bottom line: With the computer filtered & shut; it will drop the temp about 1-2°C in about 2 minutes.With the side panel off, it will drop it 5°C in 1 minute.The mean running temp in spring: is 35°C (95°F)Under load 43°C (109°F)With the fan off the computer has reached 52°C (125°F) under load on a simple game (Little Nightmares), & the VivoSun brought it down to about 42°C in about 10 minutes. Outside it was around 82°F, the room about 75°F with a pole fan running.So it does alright, just not great. It runs helps at about 5°C on average, but it does evacuate the heat to the outdoors for the most part.I can't say if the 240 CFM fan will do any better as I'm afraid it will be much louder. It's not horrible, just not quiet It sounds like an A/C unit. Oh yeah, it has a tick now after intermittent use in three months. I don't run the vivo fan when just doing text or surfing, only when gaming or doing 3D stuff.Also, the power cord is plenty long great job !! I have it on a wireless remote so I just click & on.

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.

Used as a air supply to a grow tent. It worked great until it didn't. 4 months of use! Heard a loud noise from the grow room and when I investigated I found the fan making an odd sound. Turned it off and removed it and found the fan blade had come off. I tried to put it back on but it appears the nut was initially stripped during the factory install and wouldn't go back on. May be fixable if I can find a nut to fit the shaft. Luckily the shaft is stronger than the nut and isn't stripped. Giving 1 star because this shouldn't happen and if it's not fixable it's a paper weight after 4 months of use.