F5 and f6 has changed into medium filters m5 and m6, the test procedure remains unchanged. Fine ac dust is used to determine gravimetric effi ciency as a replacement for standardized dust such as ashrae. Iso 16890 the new group classification according to new iso standard filters are divided into four groups. Definition of filtration performance from en 779 to iso. The basic technology is to pass air through a filter, which retains the pollutant and then to distribute the filtered air in the vicinity of the people, the product or the process in the building. This european standard is applied to air filters with an initial efficiency below 98% for 0. This new iso 16890 standard is a big change in the way air filters are evaluated. The coarse filter group and test procedure for g groups remain unchanged. The new standard bs en 779 2012 tripleair technology. Determination of the filtration performance british standard this european standard refers to particulate air filters for general ventilation. A prerequisite for each group is that a filter captures at. The iso 16890 standard is live and is the new global standard for testing and classification of air filters, and replaces the existing en779. General specification for airconditioning, refrigeration.
Principal of en 779 testing, coarse filter criteria en 779. All bsi british standards available online in electronic and print formats. Publication of iso 16890 the four parts of iso 16890 have been published in december 2016. Filters must be tested with an air flow rate between 0. These filters are classified according to their performance as measured in this test procedure.
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