I am specifically talking about particles in the 0.3 to 1.0 micron range which according to the graph from your link are the most difficult to filter out. Can a

I am specifically talking about particles in the 0.3 to 1.0 micron range which according to the graph from your link are the most difficult to filter out. Can a 99% filter catch these? My understanding of this is that they cannot. According to hepacart [1] 99% HEPA filters do not even exist, since HEPA seems to be clearly defined: > HEPA filter definition, which requires a filtration efficiency of 99.97% for particles as small as 0.3 microns. "HEPA-type" filters may capture larger particles but are not effective against the finer particulates that true HEPA filters excel at removing. [1] https://www.hepacart.com/blog/dont-be-fooled-by-hepa-filter-types-standard-and-approved-filters https://www.hepacart.com/blog/dont-be-fooled-by-hepa-filter-...