I love the enthusiasm and DIY ingenuity here. That said, the post is tagged with COVID-19. The COVID virus particles are .1 to .5 microns in size, and these MERV-14 filters, while certainly better than nothing, are not going to capture a significant amount of these virus particles. A better approach is to not filter the particles, but actually rip them apart at a molecular level. This has the added benefit of destroying all sorts of other contaminents that even high grade HEPA filters will miss, such as mold mycotoxins. A system like the Molekule is a good example of this approach.
https://molekule.com/technology