In the air filtration industry, there are numerous standards for
classifying, identifying, and evaluating the various performance
characteristics of air filters.
In the United States, the organization responsible for setting
these standards is ASHRAE. Since 1968, ASHRAE has released a series
of test standards for air filters, which have been recognized by
the American National Standards Institute (ANSI) as the benchmark
for filter performance classification.
In Europe, reference was made to ASHRAE standards, and CEN formally
released the European filter standard EN 779 in 2012. In 2012,
EN779 was revised for the second time, and the new standard defined
the minimum filtration efficiency (ME) for F7-F9 efficiency
filters, thus ensuring better air quality at the AHU outlet.
In 2016, the ISO 16890 standard was introduced, providing the
possibility of global standardization in the air filtration
industry and replacing the existing two regional standards: ASHRAE
52.2 and EN779:2012.
