HE particulate filters are 99.97% effective against all particulate aerosols. Filters are supplied in quantities of 3 filters and gaskets per box. NOTE The following abbreviation is approved by NIOSH to indicate the particulate filter approval for PAPRs: HE = High Efficiency Particulate Air Filter for Powered Air-Purifying Respirators Replacing the PA1FG High Efficiency Filter The high efficiency filter and gasket must be replaced when: 1. An airflow check with the airflow indicator shows that a

TC-21C-0765 PA20 PAPR Cautions and Limitations A. Not for use in atmospheres containing less than 19.5% oxygen. B. Not for use in atmospheres immediately dangerous to life or health. C. Do not exceed maximum use concentrations established by regulatory standards. F. Do not use respirator if airflow is less than four cfm (115 lpm) for tight fitting face pieces or six cfm (170 lpm) for hoods and/or helmets. I. Contains electrical parts which have not been evaluated as an ignition source in flammab