This European Standard applies to high efficiency particulate and ultra-low penetration air filters (EPA@ HEPA and ULPA) used in the field of ventilation and air conditioning and for technical processes@ e.g. for applications in clean room technology or pharmaceutical industry. It establishes a procedure for the determination of the efficiency on the basis of a particle counting method using a liquid (or alternatively a solid) test aerosol@ and allows a standardized classification of these filters in terms of their efficiency@ both local and integral efficiency.
PREN 1822-1-2017 history
2017PREN 1822-1-2017 High efficiency air filters (EPA@ HEPA and ULPA) - Part 1: Classification@ performance testing@ marking