UTUO Variable Speed Fan, 110V 120V 220V AC Powered 120mm Dual Ball Bearings Air Exhaust Vent Cooling Axial Flow Muffin Fan with 3 to 12v DC Adjustable Speed Control Dimmer Switch

Pulls the hot attic air out of my li'l storage bldg. adequately. Like the adjustability of speed and switch that it has. The plastic seems rather ultra hard and you must be careful if you screw it to something, as the plastic around the exterior of the unit that has the fan guard screwed to it will easily crack if you screw it down too tight. I would prefer, seperate ears/tabs with holes in it to screw the fan down, rather than having to utilize the fan guard holes. Better to be ultra careful with a screw gun.

I needed these to cool my electronics cabinet where my TV, modem, WiFi, and Ethernet switch are sitting and I bought the two packs so I can put the other one under my laptop since I’ve upgraded the RAM and some of the programs I use cause the laptop to get very hot and these cool it down very nicely.

I use this fan to disperse wax melt scent. It gets a star deducted because it does not operate on very low settings. I put a larger bulb in the wax warmer to get it to melt under the breeze. The application works well.

This works great, but I bought it to cool a radio amplifier. The variable switch causes noise on the radio so I had to use a different fan for that.

top speed too noisy

I bought this fan for a different application, but it is so quiet I'm using it to circulate air to different rooms

Very quiet, blows a lot of air into the cellar crawl space. variable speed is a big plus. Everybody happy!

Very quiet at low speeds. At high speeds it is loud, but still better than many 110v server cabinet fans. However, plastic is very very fragile. Out of 2 fans, 3 corners broke when using correct size screws to attach it to a server cabinet. If you attach to a server cabinet do not use screws - use thin long bolts with nuts instead.