Respiratory protective devices for use against chemical, biological, radiological and nuclear (CBRN) agents - Part 4: Powered air-purifying respirators - Specification
This standard applies to powered air-purifying respirators (PAPRs)
intended to be used during, rescue, evacuation, escape, hazard
containment and decontamination, and similar activities by emergency
responders (fire, ambulance, police, and associated civilian agencies
and workers) in areas contaminated by chemical, biological,
radiological and nuclear (CBRN) agents. It contains requirements for
designation, classification, testing and marking of the device.