40x40mm fan duct
myminifactory
After fabricating the excellent 30mm to 40mm fan adapter for my Prusa i3 MK2 found here: https://www.myminifactory.com/object/original-prusa-i3-mk2-40x40x10mm-fan-adapter-25828, I discovered that the fan created a noticeable draft onto the heatbed occasionally causing problems. To mitigate this issue, I designed and built this duct to help minimize its impact. I envision it being used in a similar manner for any 40x40mm fan as well.
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