Thanks to a higher CADR, it can actually be better than HEPA in practice, if you use 4 filters to create a corsi-rosenthal box, as shown here: https://www.texa

Thanks to a higher CADR, it can actually be better than HEPA in practice, if you use 4 filters to create a corsi-rosenthal box, as shown here: https://www.texairfilters.com/its-all-about-the-air-flow-through-the-filter/ https://www.texairfilters.com/its-all-about-the-air-flow-thr...