Wderair 4 x 120mm Server Rack Mount Fan 12V with 100V - 240V AC Power Variable Speed Control, High Airflow for DIY Cooling Mining Rig, AV Cabinets, Home Theater, Refrigerator, Greenhouse

This is one of the most durable built from metal. adjustable speed and airflow fans I have used. This is a 4x120mm server rack fans 110v . I got this for my greenhouse but can be used for servers and cooling computer systems as well as many other uses. I am very impressed with this very nicely made fan ,a great price for this heavy duty built fan.

I got the fan for my bathroom air circulation, with these fan i can blow out the condensation after a hot shower, very easy to instal and the fan is also quiet, I LOVE IT !!!!

Installed on an open networking rack with the included hardware. The four fans span the rack perfectly and the holes line up with the rack holes. They thoughtfully included the clips to assemble the two fan sets together to make this possible. Easy plug and play from there, but boy are they loud when fully spun up. Just to be clear, most rack fans are loud. They maximize airflow over decibel levels. My other rack fans are actually computer fans that I select due to the low acoustic impact. I did feel I needed a bit more airflow at one point in the rack that gets rather warm. These fans do the trick. The speed controller helps me balance that decibel/airflow balance to the best effect. Quite pleased with them.

These fans are solid, appear to be good quality. I got them for my greenhouse, so will have a more detailed review after next summer, and will update then. But in the meantime they do move quite a bit of air, so should help keep the greenhouse ventilated.

This is 2x240mm fan arrays with dual ball bearing setups. The bearings they claim are good for 50,000 hours. While not as good as some bearings out there, like FDB which is rated between 100,000 and 120,000 hours or SSO/2 from Noctua which is rated for 150,000+ hours. But to put 50,000 hours into perspective, that is 2083 days or 5.7 years of constant use. I am using this in a unique way, where I am using this to extract heat into our basement from a small fin array I installed to warm the basement at the end of the loop. It works amazingly well, and saves me from having to install a 2ft length addon that is 79 dollars and wouldnt improve efficiency much being open as it is. (This takes more of that heat out at the lowest RPM speed than a second array would offer while being passive.) Because I only need the one array, I stored the second one away so as to offer up a replacement in, hopefully 5 years. This is a AC powered setup though, with a dial a speed knob. I found that barely up from slowest speed helps out enormously. I doubt you would need all four fans for a a router setup mind you, but they accurately said you could use this for Mining Crypto. (Just be careful as those are transient assets with no physical assets to support it.) It would work great for cooling open rigs though. At highest speed though, these are very very loud, at the speed I have it at though, it is sub ambient with other noises naturally overwhelming it. Like the rustle of leaves outside despite being in the basement and closed cell foam insulating between the floor joists which is very faint in sound. I can say I am happy though and this was worth it. I would likely just by the single 240mm array next time though, if I see another opportunity mind you.

These fans blow... but in a good way! It has a speed controller and is fairly quiet for 120mm fans. I set mine up on my desk to dry the hot glue that Im using for a sculpture Im creating. Theyre able to stand on their own even at 100% power, so I just place them on each side of the piece and leave it on as I work.

OK. You want quiet fans that can move a lot of air? Check. You want 120mm fans that can REALLY move some air and dont care about fan noise? It has that too. You cannot complain with that at all. Variable controlled, not via software or through your UEFI (BIOS) but via your own two fingers.

Im using this to cool off my lights on a deep aquarium. It has kept the temperatures down in the tank which I was having trouble with.

Good airflow. Easy to control on your own instead of dealing with automated fan curves and no slowdown under 30% and other such junk. You can use it to cool off computers or other high powered electronics inside of a entertainment center.

These fans have a speed controller that operates them smoothly. There is a little noise associated with them but not distracting to the user. When the 4 fans are all bolted together they move quite a volume of air that would be sufficient to keep most electronics operating and cool. The individual fans call for 12VDC as a power source and are configured as two fans per connection. There is ample hardware to mount these fans for use in most electronic racks.