EN 1822-5:2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Description of the method
5 Test filter
6 Test apparatus
7 Conditions of the test air
8 Test procedure
9 Evaluation
10 Test report
11 Maintenance and inspection of the test apparatus
Annex A (informative) - Testing and classification method
                        for filters with MPPS <= 0,1 [mu]m
                        (e.g. membrane medium filters)
Annex B (normative) - Testing and classification of filters
                      using media with (charged) synthetic
                      fibers
Bibliography

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 test aerosol, and allows a standardized classification of these filters in terms of their efficiency.This part of the EN 1822 series deals with measuring the efficiency of filter elements, specifying the conditions and procedures for carrying out tests, describing a specimen test apparatus and its components, and including the method for evaluating test results.