80mm Fan duct
thingiverse
This is a simple fan duct for a 80mm fan from amazon here is the link for the fan:https://www.amazon.com/AC-Infinity-MULTIFAN-Receiver-Playstation/dp/B00IJ2J2K0/ref=sr_1_8?keywords=usb+fans&sr=8-8The area of the exit point is the same area as the fan so it wont try to pressurize the air. (These fans are not made for pressure and if they try to create pressure they will actually blow air backwards)Exit is pointed slightly upwards.
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