Standards - HEPA-filters
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| EN 1822-1:2009 | 2009-11-18 | High efficiency air filters (EPA, HEPA and ULPA) - Part 1: Classification, performance testing, marking |
| EN 1822-2:2009 | 2009-11-18 | High efficiency air filters (EPA, HEPA and ULPA) - Part 2: Aerosol production, measuring equipment, particle counting statistics |
| EN 1822-3:2009 | 2009-11-18 | High efficiency air filters (EPA, HEPA and ULPA) - Part 3: Testing flat sheet filter media |
| EN 1822-4:2009 | 2009-11-18 | High efficiency air filters (EPA, HEPA and ULPA) - Part 4: Determining leakage of filter elements (scan method) |
| EN 1822-5:2009 | 2009-11-18 | High efficiency air filters (EPA, HEPA and ULPA) - Part 5: Determining the efficiency of filter elements |