HEPA Filtration is used in applications where the cleanest of air is required. HEPA is an acronym for High Efficiency Particulate Air.
By definition, a HEPA filter is a throwaway extended, minimum, dry type filter in a rigid frame, having a minimum particle collection efficiency of 99.97% on 0.3 microns particles of thermally generated DOP (Di-Octyl Phthalate) or specified alternative aerosol. There are various types of HEPA filters designed to fit a wide variety of applications.
IEST-RP-CC001.4 identifies eleven different HEPA and ULPA filters based on description and application. We generally divide HEPA filters into two product categories: