Sea can exhaust fan vent noctua 140 mm
thingiverse
This is a 2 piece exterior vent system specifically designed to fit a sea can. Cut a square hole 100mmx100mm in the corrugated rear wall, and assemble with a bug screen in between and some caulking on the outer flange. I used 1/4 x 20 bolts. Then you can fit a noctua 140 mm fan on the inside, drill and mount, and add your 12v source. The tapered inner piece does a pretty good job of wedging into the corrugation of the wall, so long as you cut your hole on the outermost section, so your inner piece sits in the valley. I did add a couple 2mm wedges just to snug it up a bit tighter in the wedge.
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