The purpose of this project was to design a 100% printable structure that allows to easily change filters and it works in a desk (compact and powerful USB device).
This air purifier can be used as fumes extractor (for soldering) or simply as air purifier. By changing the kind of filter you will get different results.
In this instructable I use 2 activated carbon filters. But it works well with a HEPA filter and a carbon filter (one for each drawer).
All designed in Fusion 360.