HEPA (High Efficiency Particulate Air) Filters are used in applications where the cleanest of air is required. 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.
In accordance with regulatory standards,
Primary Tests (must pass to be certified)
- Upstream aerosol challenge concentration
- Acceptable design leakage percentage
- Actual leakage measured
- Pass or fail