The working github repository is below. You have to remember this is a *working* repository. It's constantly in flux, that's why there are often multiple files for the same kind of part. It's not a polished package ready for easy duplication right now. There is little point in trying to do that because it's extremely rare anyone actually try to duplicate such a device. https://github.com/adouglas89/Big-Quiet-Fan/ . There is an older repository that contains files for older versions of the fan as well as the structure, control box and anemometer used to produce the actual air purifier which proves the CADR and practicality of things: https://github.com/adouglas89/Big-quiet-air-purifier/