Fan Guard/Filter Holder
thingiverse
A fan guard / filter holder for std 4" fan. I used overly long screws, with nuts to hold the actual fan inside the enclosure, then cut a piece of filter material, the stuff that's about 1/2" thick, to fit to guard, then used nuts to hold the guard to the back of the enclosure. Instructions pretty simple part to print, no over hangs. I printed it from silver PLA, .21 thk layers, 2 fills on the bottom and top, 5 perimeters, so it didn't need much infill.
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