BUT-H1 facemask filter frame
thingiverse
This is a frame for a removable filter designed to fit snugly into the [BUT-H1 facemask](https://www.vutbr.cz/en/but/news-f19528/covid-19-protection-halfmask-but-h1-d197642) created by the Brno University of Technology in the Czech Republic. The frame is comprised of two interconnected components that form a unique zigzag pattern. The filtration medium is carefully woven throughout this intricate design, significantly increasing its surface area, much like the commercial vacuum-cleaner HEPA filters and similar models. This entire filter can be easily sterilized by submerging it in boiling water if printed from ABS plastic, and if the filtration medium itself can withstand such temperatures.
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