Wathai 140mm x 25mm Computer Fan with AC Plug 110V 120V 220V 240V Variable Speed Controller for DIY Biltong Box Reptile Aquarium Receiver DVR PlayStation Xbox Cabinet Ventilation Cooling

Best unit out there. It managed to cool off my most powerful Ryzen 9 370 AI Mini PC by lowering temp by 12C on idle. Highly recommended, I will be getting more for my other MiniPC's. This little monster has some power, it uses 12V with a dedicated power supply with a variable speed switch. I bought before a ELUTENG Dual USB Computer Cooling Fan High Speed 120mm 5V USB which has a great construction but has a weak performance and didn't make any difference on any of my MiniPC's . This is the one you need to make a tangible difference in CPU Temps with the heating wave we're currently having in eastern Canada. It requires some basic assemble, manual wasn't that clear and overall design could be better, after assembling metal grills with screws, nuts, and plastic base which is great, a tip on the screws had some protruding that may cause some short circuit if leave it unattended, I used double duck tape to isolate and prevent any contact for each one of the four large screws, and have a piece of mind with my highly valuable MiniPC.

This fan is excellent for distributing heat in my apartment. The only heat I have is in my living room and I have the fan in my doorway that leads from there to the rest of the apartment. It’s quiet and I can control the speed depending on how cold it gets. It’s a great buy that I’m very happy with 👍

Needed to help cool an electrical panel in the summer, works great.

i always buy wathai fans when i need small non PC air flow. I have 4x140mm fans and 2x120mm fans that direct my AC right to my face while i’m gaming. 2x140mm fans are set up with dryer vents tubes direct the exhaust from my pc directly outside my window. i have run these ran at almost twice their capacity for almost a year now using an after market speed controller and they still work great. you can tell they were build to take punishment

These may seem expensive for ONE FAN at $14 - $20, but they aren't since most PC CASE fans don't meet this rated speed, don't have waterproofing, and don't come with the controller. My REATAN PC is all metal, and uses that fact to its advantage. The REATAN also has a fan on its underside to cool the RAM and M.2s. I use the 140 on the bottom to assist the bottom fan and suck heat from it. Then on top bought 3 40x120 heatsinks (going to replace it with a 120x120 that just came in) and used a 120MM WATHAI fan on top to assist with top cooling. Since the CPU heat spreader touches the metal top of this PC CASE. Keeps my CPU and GPU in the mid 40s. These things move AIR, you put your hand on the intake side, and it sucks your hand in, yay safety grills. Also these are REASONABLY PRICED, as someone who did try to jerry rig his own solution. Similar CFM rated fans cost about $15 minimum and top out at usually 1800RPMs. That's just the fan, add a filter, that's about $6 for 1 or can get a 3 pack for $12, then you need feet, $5 for 20, then the adapter to wall which is $5, then you need screws for the feet which are about $3, then you might want to control the fan speed so need a $20 piece that seems to only be made by NOCTUA. And there you go, when all is said and done, your homemade equivalent now cost you 3x as much. Especially if you want the same IP67 rating these offer. They're built well, move a crap ton of air, aren't loud, and are the complete package. ONLY ADDITIONAL PURCHASE I'd make, is a "Y" splitter that way you only need one controller for both fans in my setup, and is only taking one outlet space. That's probably the ONLY COMPLAINT I have, the control box is unnecessarily MASSIVE. Especially when used in the usecases they're describing. The noctua controller and CoolerGuy 12v to fan adapter is such a tiny package, you could easily VHB mount it to the front of your router, DVR, etc device. 100% recommend.