VIVOSUN D4 4" AC Motor Inline Fan, 195 CFM for Ventilation

In making this next generation gaming computer, with an 8 gig Radeon video card among other things, the blowing or ambient heat from the computer is enough to heat a small room. I can & have used it in the winter to do that. Well, I was running something, & it was on over night. In the summer, I want to expel this heat so I can stand to be in there, gaming. Trying to get the right CFM to noise ratio can be difficult in a computer environment, in a small room. Mainly home based. This extractor from VivoSun is a great one. It's not quiet, & sometimes I can't wait to turn it off, but it pulls out the heat like I want it to, well, enough to keep the temps nice. Generally, the CPU's radiator will get up to about 107°F-113°F (42-45°C ) with this 195 CFM fan bringing it to (32°C-37°C) 89.6°F-98.6°F & it's pulling most of that heat out the window. I included a snap of some general video editing temps with out the VivoSun, & the bottom one is after it got going. The temps dropped in about a minute, which is super fast! When I "forget" to turn it on, & the computer gets up to about 45°C, it takes the exhaust about eight odd minutes to bring it down to 35°C & about a full 10 minutes to level off at 33°F. So that's not bad really. I have tried a small CFM unit (106 CFM), but the pull just wasn't there. I have included a video so you can hear how it sounds. Of course, it's muffled a bit, being I captured it from my phone, & recordings always sound different than your ear. If I can, I'll try to include a video of the room's cooling turbo fan so you can hear them both. Not bad, but not whisper quiet. They don't claim to be, either, so nothing on them. If I bring the tower down to the floor, or move it away, that will change things a whole bunch. If you're thinking about adding an external cooler to your gaming/video unit, I strongly suggest VivoSun. The product works great, & they are on top of any blips you may have. In fact, they helped me upgrade to this unit with a matter of an e-mail. That's AWESOMENESS to the 10th! Now I don't have to "worry" about leaving the computer on for a bit while I'm in the middle of a game, or when I step away for a moment. I know that this exhaust fan is going to keep the system cool. Bottom line, this exhaust fan works very well sealed to my tower's top fan port. So much that I will be adding a smaller one to my 3D printer to better help regulate the temps in that case. I did need to purchase dryer duct (hose), & a 4" inlet pipe. The aluminum tape & clamps came with the dryer ducting. I used some sticky sound dampening on the I/O exit panel to better direct the air flow being pulled up & out. Also, it has holes in the "feet" for more secure mounting. I just hot glued it.

Great inline fan for bathroom vents, works in attic hence low noise in bathroom

The fan I received has clearly been used. It has a fine brown dust on the blades and inside the housing. Has a bit of an acrid smell. As I was planning on using this as a secondary exhaust puller for a laser cutter, this did not bother me too much although it was unprofessional. If I needed it for air circulation I or plants were to breathe I would have been upset. Fan has been sitting for a couple months until I got my laser cutter setup. I plugged it in today and wouldn't you know: nothing happens. The motor is dead. They sent me a clearly used fan with a dead motor. Update May 25, 2020: I contacted the seller and after some back and forth via email and photos of the unit they refunded me the cost of the fan. Seller is professional in communications and took responsibility. I am going to assume that a returned item was accidentally restocked and that is what I got. Rating changed from 1 to 4.

I ended up ordering this 4" inline fan for my exhaust in my 2x2 grow tent cause I didn't need as much power as I needed for my 2x4 tent so I got the same size fan just a step down in the power. I am very satisfied with this product. When hooked up to my exhaust system on my 2x2 tent I have it pulling air from the tent through my carbon filter and out a top duct and the flow of air is perfect for this tent. I get nice negative pressure in my tent and it definitely has enough power to safely clear the air inside the tent. The noise level is super quiet even on Max speed. I have my setup tucked behind my dresser in the corner of my room and you don't even know it's there, and can barely hear the fan running, well unless u get right next to it then u hear slight humming but if your a few feet away you don't hear it. So glad i bought this fan, and the build quality is really good as well. It's built solid, and have been running it 24/7 for the past year and it still sounds and functions like it did on day 1 of use. I would highly recommend this fan to anyone who is looking to get an exhaust inline fan for their 2x2 grow tent.

This fan works well with good air flow. I use it as a 3D printer exhaust fan and it is able to keep the print chamber cool.

When I first opened the package I was pretty eager to set it up in my new tent, once I plugged it in and set it up, it made a humming/vibration sound and was starting to get warm to the touch. I had to pretty much fling the fan blade and get it started in motion in order for it to work, worried about turning the fan off incase I may have to do it again. The speed is amazing, the air flow is awesome and the installation was a piece of cake but for that one reason I have to dock 2 stars off of this, was almost DOA.

I fit this ventilation fan to vent my shop! Intake end to pull nonflammable fumes/odor's and used dryer vent hose to outside dryer style vent. I then used remote on-off switch to activate and turn off, Works great!

Worked ok at first. It got weaker and weaker, and eventually died after two years. It only got used a couple hours per week.

Excelente potencia y relativamente silencioso

Good fan, but weak plastic. Unfortunately, mine fell and shattered into pieces :/

Not very obvious from description that it's 110-120V and US plug, also it dosent have a remote or even a switch to turn it on/off, as it says in description. It is quiet and seems to move an ok amount of air

I urge anyone thinking about purchasing this item don't it's not for use in the UK you will be disappointed and Amazon have disappointed customers buy having this available in the UK ... DON'T BUY ....

Don't bother US plug 110v useless to anyone in the UK