EN 1822-4:2009

High efficiency air filters (EPA, HEPA and ULPA) - Part 4: Determining leakage of filter elements (scan method)

Publication date:   May 21, 2010

General information

99.60 Withdrawal effective   Oct 10, 2018


CEN/TC 195 Cleaning equipment for air and other gases

European Norm

13.040.40   Stationary source emissions



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This European Standard applies to efficient air filters (EPA), high efficiency air filters (HEPA) and ultra low penetration air filters (ULPA-filters) 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 an artificial test aerosol, and allows a standardized classification of these filters in terms of their efficiency.
This part of EN 1822 applies to the leak testing of filter elements. The scan method which is described in detail regarding procedure, apparatus and test conditions in the body of this standard is valid for the complete range of group H and U filters and is considered to be the reference test method for leak determination. The 'Oil Thread Leak Test' according to Annex A and the '0,3 µm - 0,5 µm Particle Efficiency Leak Test' according to Annex E may be used alternatively but for defined classes of group H filters only.

Life cycle


EN 1822-4:2000


EN 1822-4:2009
99.60 Withdrawal effective
Oct 10, 2018


EN ISO 29463-4:2018