22 Micron Filters found in: Filter 30mm 0.45um HPLC Red, RXPert Single Filtered Balance Systems, PTFE Flake Catching Cups, Carboy Vent Filter, 0.2 Micron,.. capable of airflow from 13 CFM to 100 CFM; inlet and outlet HEPA filters, 99.99% efficient on 0.3 micron particulates, and test port for challenging HEPA filter; main chamber static pressure gauge for monitoring HEPA filter