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

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.

I bought this to install in my living room console to vent the hot air generated by my PS4, which is tucked away inside a compartment with a closed and locked door to keep my one year old from getting into it. The only problem is that the heat buildup caused by running graphically intense games would quickly get the inside of the cabinet way too hot, posing a damage risk to the PS4. This was just the solution I needed. I measured and cut an opening in the thin backing material of the console cabinet and installed these fans to exhaust the hot air out, and left the on/off/speed control switch sitting on the surface of the console until I can rig up a thermal switch or add a smart outlet to control it.

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.

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.

These fans sound almost like a drone when you run them at high speed, though not quite as loud as a drone. That being said, I dont need to run them at high speeds, as they give good airflow even at lower speeds. I have them running at about 30% or so, and they keep my AV equipment cool without any significant noise. I used two blowing air in near the bottom and two blowing air out at the top, and I can actually feel the airflow in various spots in my cabinet with my hand, even at that low speed. I can see these being useful for a wide variety of applications.

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.

I ordered these to cool down some network appliances I have installed inside a closet. I have the 3 fans pulling air from a vent in the closet onto the appliances. They are extremely easy to install, just plug them in and dial in a speed. They can be configured to be completely silent to moderately noisy. Running these at their full speed is still lower volume then a server fan but audible from across a 20ft room at midnight. During the day running at full speed I could not hear these from across the room. Running these at a moderate speed produced enough air for my scenario and produced a very low audible volume.

Review is for Wderair 4 x 120mm Server Rack Mount Fan 12V with 100V - 240V AC Power Variable Speed

I make my own method to cooldown the tube of CO2 Laser Engraver, and works perfect to me.

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.