Review on Dual 120mm USB Fan with 3-Speed Controller - KEYNICE DC 5V Powered Desk Fan for Cooling AV Receiver, DVR, Playstation, TV Box, Computer Cabinet by Alexander Roberson

I've been eyeing a window vent for a long time, but couldn't find the right vent size for my kitchen window. I ordered this dual 12" fan and panel to make my own. It turned out very well. I installed an upper fan to pull warm air out of the kitchen and a lower fan blows cold air outside. The noise is acceptable for kitchen use, I can't even tell it was on. Compare the cost to an 8 inch dual window fan, my design is even lower. The only downside is that the cord is short, you can lengthen it.