90.93 Standard confirmed Sep 5, 2022
ISO
ISO/TC 142 Cleaning equipment for air and other gases
Technical Specification
91.140.30 Ventilation and air-conditioning systems
This document specifies the testing instruments and procedure for determining the filtration efficiencies of flat sheet filter media against airborne nanoparticles in the range of 3 nm to 30 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/TS 21083-2:2019
90.93
Standard confirmed
Sep 5, 2022