HomePPE TestsCSA Z94.4.1 (Similar to NIOSH STP-0003/0007)
CSA Z94.4.1 (Similar to NIOSH STP-0003/0007)
Exhalation and Inhalation resistance (Levels 100Pa, 175Pa, 343Pa)
Respirators are tested for resistance to exhalation air flow by measuring the differential pressure across the filter with airflow moving from inside to outside of the mask.