The aim of the new standard ISO 16890 for performance evaluation of air filters for general ventilation was to harmonize existing local standards such as the ASHRAE 52.2 which is common in the United States and EN 779 which was developed in Europe. Since July 2018 the EN 779 is finally withdrawn.
The new standard intends to achieve more realistic laboratory filter evaluation, which has the result, that the test procedure becomes more complex. The more realistic laboratory filter evaluations are realized by rating particle fractions, now the particle sizes from 0,3 µm to 10 µm are considered. Furthermore an additional aerosol KCl is used, the whole filter is discharged with IPA. ISO A2 fine dust is used for optional loading tests. Also the previously known filter classes F,M and G, are replaced by the filter classes ISO ePM1, ISO ePM2,5 and ISO ePM10. To classify the filters, the minimum efficiency values ePM1,min and ePM2,5,min have to be used in addition to the efficiency values ePM1, ePM2,5 and ePM10,
This paper will present a latest state of the art testing methodology which fulfils all the new requirements of ISO16890. The focus of this paper will be the description of the setup of a fully automatic filter test system with two optical particle counters. Furthermore all important key components including the discharging according to ISO 16890-4 will be presented, which are necessary for the determination of the filter performance parameters. As well as the evaluation of the obtained measurement data and the creation of a summary report according to the ISO 16890 standard in which all parameters are determined and recorded for a direct interpretation of the test results as well as the filter classification...
Session: G7 - Filter Test Systems I
Day: 23 October 2019
Time: 13:00 - 14:15 h