HEPA and ULPA filters are the quiet workhorses behind clean air in labs and controlled spaces. Things like the tiny particles that can ruin experiments, contaminate products, or put people at risk are all trapped by these filters... https://droomit.com/read-blog/1297_how-hepa-amp-ulpa-filters-work-in-laminar-flow-hoods-and-when-to-replace-them.html