Multi-part Document
BS EN 1822 - High efficiency air filters (HEPA and ULPA)

This is a multi-part document divided into the following parts:

• Part 1 High efficiency air filters (HEPA and ULPA). Classification, performance testing, marking
• Part 2 High efficiency air filters (HEPA and ULPA). Aerosol production, measuring equipment, particle counting statistics
• Part 3 High efficiency air filters (HEPA and ULPA). Testing flat sheet filter media
• Part 4 High efficiency air filters (HEPA and ULPA). Determining leakage of filter element (scan method)
• Part 5 High efficiency air filters (HEPA and ULPA). Determining the efficiency of filter element