DS/EN 1822-2:2009 ( Withdrawn )

High efficiency air filters (EPA, HEPA and ULPA) - Part 2: Aerosol production, measuring equipment, particle counting statistics

Replaced by:
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This European Standard applies to efficient particulate air filters (EPA), high efficiency particulate air filters (HEPA) and ultra low penetration air filters (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.
This European Standard describes the measuring instruments and aerosol generators used in the course of this testing. With regard to particle counting it specifies the statistical basis for the evaluation of counts with only small numbers of counted events.

Number of pages: 32

Published: 2009-12-18

Date of approval: 2009-12-15

Date of withdrawal: 2019-04-30

International relationships : EN 1822-2:2009 IDT

ICS: 13.040.35 - Cleanrooms and associated controlled environments 13.040.40 - Stationary source emissions 23.120 - Ventilators. Fans. Air-conditioners

Item number: M228304



  • CEN/TC 195/WG 2

Danish committee