An arduino powered air purifier, created mostly from 3D printed parts. Measured PM 2.5 dust readings and other parameters control the purifier's power output.
Building instructions for the purifier. If you have a 3D-printer that can print 205x205mm you are good to go. I printed mine on an entry level Ancubic Mega S.
Complete set of parts provided as STL-Files.
To illustrate power of the device, i placed it upside down and let it run at full power. It actually starts to float on it's own airstream.