IS 17570 : Part 2 : 2025/ISO 16890-2 : 2022 Air Filters for General Ventilation - Part 2 Measurement of Fractional Efficiency and Airflow Resistance
NATIONAL FOREWORD
This Indian Standard (Part 2) (First Revision) which is identical to ISO 16890-2 : 2022 'Air filters for general ventilation Part 2 : Measurement of fractional efficiency and air flow resistance' issued by the International Organization for Standardization (ISO), was adopted by the Bureau of Indian Standards on recommendation of the Refrigeration and Air Conditioning Sectional Committee and approval of the Mechanical Engineering Division council.
This standard was first published in 2021. This revision has been taken up to adopt the standard ISO 16890-2 : 2022.
This standard is one of the series of Indian Standards on air filters for general ventilation. The other parts in this series under the general title are as follows:
Part 1 Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM)
Part 3 Determination of the gravimetric efficiency and the air flow resistance versus the mass of test dust captured
Part 4 Conditioning method to determine the minimum fractional test efficiency
The text of ISO standard has been approved for publication as Indian Standard without deviations. Certain terminology and conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as a decimal marker.