Powered air purifying respirator

From GAWDAwiki

A powered air purifing respirator (PAPR) is a battery-operated mask consisting of a half or full facepiece, breathing tube, battery-operated blower and particle filter. The device uses a blower to pass contaminated air through a filter, removing the contaminant while at the same time pumping purified air into the facepiece.^[1]

references

1. http://www.health.state.mn.us/divs/idepc/dtopics/infectioncontrol/ppe/comp/papr.html#filters