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 | ISO 16890 IPA Vapour Discharge Time Study April 17th, 2019 Test standard EN 779:2012 (1) has been superseded by a new standard ISO 16890:2016 (2). An important part of both standards is to measure the minimum efficiency of a filter, which is also referred to as the ‘discharged efficiency’. |
 | Air Filter Test Standards - An Overview March 18th, 2019 The World Health Organisation published these facts in 2018: |
