Tertiary discussion on some related issues of ISO 16890:2016 standard

ISO 16890:2016 Air filters for general ventilation defines the particle matter efficiency (ePMx) for air filters which is calculated by a mathematical model of typical atmospheric aerosol discrete particle volume distribution based on the aerosol fractional efficiency of air filters. Compares the calculated ePMx with the data obtained by the dust analyzer under the same conditions. Discusses the settlement of particle size for light scattering particle counter recommended in the ISO 16890:2016, and proposes suggestions for developing domestic particle counter and its particle size settlement to satisfy requirements of the ISO 16890:2016.