2 ms·
most filters remove large and small particles. its the mid size that the good filters get.
by woleium 3y ago
most filters remove large and small particles. its the mid size that the good filters get.
- amluto 3y agoHmm, I recall an EPA chart showing expected performance of different MERV classes versus particle size that had the lower classes staying at zero for very small particles, but I’m not seeing it right now. But I found this — start at page 71. https://ordspub.epa.gov/ords/eims/eimscomm.getfile?p_download_id=499474 https://ordspub.epa.gov/ords/eims/eimscomm.getfile?p_downloa... You do want the higher MERV classes to get decent performance.
- woleium 3y agothis linked article has a bunch of info https://news.ycombinator.com/item?id=31812259 https://news.ycombinator.com/item?id=31812259