90.93 Standard confirmed Mar 11, 2024
ISO
ISO/TC 142 Cleaning equipment for air and other gases
International Standard
91.140.30 Ventilation and air-conditioning systems
Published
This document specifies the testing instruments and procedure for determining the fractional filtration efficiencies of flat sheet filter medium against airborne nanoparticles in the range of 20 nm to 500 nm. The testing methods in this document are limited to spherical or nearly-spherical particles to avoid uncertainties due to the particle shape.
PUBLISHED
ISO 21083-1:2018
90.93
Standard confirmed
Mar 11, 2024