How can one establish, as the end-user, whether a filter will provide the envisaged air quality? Throughout Europe, air filters are classified according to two standards: EN779:2002 for course and fine filters, and EN1822:2009 for HEPA and ULPA filters. Filters that are tested for compliance with these standards naturally meet stringent requirements. During such tests, the filters are exposed to circumstances which indicate precisely how they will perform in practice. As the customer, it is a comforting thought to know that all the products AFPRO Filters supplies are compliant with European classification. The filters are tested in both our own and independent laboratories. Furthermore, AFPRO Filters complies with the stringent requirements of the Eurovent certification programme. This guarantees that the actual filter performance is in line with the specifications presented. Further details of the Eurovent certification programme can be found on page 9.
EN779:2002 en EN1822:2009
The EN779:2002 standard is used for the classification of course and fine filters. This is based on the average efficiency of the filters. EN779:2002 allocates course filters to the classes G1 to G4. and fine filters to the classes F5 to F9.
The EN1822:2009 standard classifies HEPA and ULPA filters.
In this case, MPPS efficiency is leading. The table contains detailed information on the European filter classifications. AFPRO Filters supplies test certificates with all HEPA and ULPA filters. You can therefore rest assured that the filter supplied is of suitable quality. However, we do recommend subsequent validation of the filters following installation, to ensure that they were not damaged during transport or fitting.
MPPS stands for most penetrating particle size. This refers to the dimensions of those particles that are the most difficult to trap. It generally lies in the region of 0.1 to 0.2 microns (µm). The MPPS has to be established before subjecting a filter to tests. The overall efficiency and the local efficiency are then determined, depending on the filter class.