Classification of air filters

ISO 16890

The ISO 16890 standard for filter testing and assessment replaced the previous EN 779 standard in mid-2018. Now, filter efficiencies will be determined with regard to the particulate classes PM1, PM2,5 and PM10, as well as coarse dust. The ISO 16890 standard is thus based on the same evaluation parameters used by the WHO and other environmental authorities.

Learn more

EN 1822 and ISO 29463

In Europe, EPA, HEPA and ULPA filters are subject to classification according to EN 1822 for filtration efficiency and zero leakage. HEPA and ULPA filters are also subject to individual tests. The international standard ISO 29463 is based on European standard EN 1822 and will probably replace this standard in the future. Both standards are based on the latest particle counting methods.

Learn more

ISO 29461-1 - for turbomachinery

With the revised test standard ISO 29461 Part 1 a new classification system for air filters in the intake filtration of turbomachinery comes into force. The target-group oriented T-classification system links the two existing test standards ISO 16890 and ISO 29463/EN 1822 via a consistent system of filter classes for static intake air filters.

Learn more

EN 779:2012

The EN 779 standard "Particulate air filters for general ventilation" defined the test procedure for coarse and fine dust filters. The EN 779:2012 version valid from April 2012 until mid-2018 included the introduction of minimum efficiency levels for classes F7 to F9, and the renaming of classes F5 and F6 to M5 and M6. Since mid-2018, EN 779 has been completely replaced by the ISO 16890 standard in Europe.

Further information

Dust class according to DIN EN 60335-2-69 appendix AA

Filter media used in dust removal machines is tested according to the SBM dust class DIN EN 60335-2-69 appendix AA. The maximum degree of penetration decides whether a filter material is classified as an L, M or H class.

Contact us

Benefit from our specialized expertise in classification of air filters

Select and request detailed information.

Standards and Certifications

ISO 16890 - Closer to reality

The new ISO 16890 enables the best filter solution

Standards and Certifications

Test method for EPA / HEPA / ULPA filters

EN 1822 and ISO 29463

Standards and Certifications

EN 779: 2012 Compact

The new filter classification standard in overview