This new European standard is based on
particle counting methods that
actually cover most needs for different
applications. EN 1922:2009 differs from its
previous edition (EN 1822:1998) by including
the following:
• An alternative method for leakage testing of
Group H filters with shapes other than
panels
• An alternative test method for using a
solid, instead of a liquid, test aerosol
A method for testing and classifying of
filters made out of membrane-type media
• A method for testing and classifying
filters made out of synthetic fibre media