140mm computer fan duct

thingiverse

This is used for a laptop cooler i made but this can be used for anything. This is a duct that forces the air from a 140mm computer fan thru a flanged opening. this is great for limited room to mount a fan but a need for good air flow. Depending on slicer settings this may have a gap near the face of the fan mounting plane where it meats the front or back surface. it happened to me once but it was a obscure setting that was changed by accident on my slicer software. You can scale this down to fit a 120mm fan i just did 140 because that is the spare fan i had and since it was a noctua i wanted to put it to good use.