In 2012 after ten years of being valid unchanged the EN779:2002 was updated. Intensive discussions within the European technical associations finally led to a substantial extension of the test norm. For the very first time a minimum efficiency for discharged filter medium was defined and its test became a compulsory constituent of the new test procedure. This in turn made it possible to compare energy consumption between various filter media.
This EN779:2012 will most likely already be globally replaced by the ISO 16890 in 2017, which revolutionize the assessment and classification of air filters. Although the ISO 16890 is widly welcomed by the scientific community, it at the same time imposes great challenges to the test labs, the filter manufacturers as well as the filter trading companies.
The ISO 16890 will replace the well-known filter classifications M5 -F9 by the introduction of ePM classes. The ePM classes no longer measure the filter efficiency of one single particle size. The new filter classes contain the declination of filtration efficiency of various particle sizes.
The intensely criticized conventional so called Ashrae dust being used for filter efficiencies and dust loading capacities according to EN779 will be replaced by a completely new synthetic dust in the new test norm. The range of measured particle sizes will also affect the types of aerosols that need to be considered. The DEHS that is currently applied does not transport particles larger than 1.0 µm.
The discharging method, which became compulsory in 2012 as part of the main body of the norm called only for discharging small filter media flat sheet samples. Up to now these local minimum efficiencies were considered sufficient to induce conclusions for a fully assembled filter unit. The introduction of the ISO 16890 will make it necessary to....
Session: G10 - Short Oral + Poster Presentations
Day: 12 October 2016
Time: 14:45 - 16:45 h