Inspired by the silent cooling of my Felix Pro 3 and the Ultimaker I wanted a small, light and effectively filament cooler. Radial blower have a high efficiency and are silent. I chose a real 24V one and not a 12V that can be drive up to 24V. Because of the heat you have to print with ABS, ASA or PC. I use 10mm M3 spacers.
I made a dual blower version to cool from both sides. https://www.thingiverse.com/thing:3627922
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