Powered Air Purifying Respirator
Is a PAPR always tight-fitting?
No. PAPRs may use tight-fitting facepieces or loose-fitting hoods/helmets; loose-fitting designs do not require a facial seal, but the assigned protection factor depends on the configuration and applicable standard.
Does a PAPR reduce the need for fit testing?
Not always. Loose-fitting PAPRs generally do not require a face seal fit test, but tight-fitting PAPR facepieces do fall under respiratory fit-testing and selection requirements in respiratory protection programs.
What protection level can a PAPR provide?
WorkSafeBC guidance identifies APF 25 for hood/helmet PAPRs with HEPA or sorbent components under specified conditions, while other jurisdictions and configurations may assign higher values depending on facepiece design and testing basis.
A Powered Air Purifying Respirator (PAPR) is a battery-powered respirator that uses a blower to draw ambient air through filters or cartridges, delivering cleaned air to a hood, helmet, or facepiece. Unlike negative-pressure respirators, it does not rely on the wearer's inhalation. PAPRs are classified as air-purifying respirators and are selected based on hazard concentration, contaminant type, and assigned protection factor (APF).
On a shop floor, PAPRs are used for dust, fumes, mists, or bioaerosols when engineering controls are insufficient and a higher APF than a half-mask is needed. Common applications include welding support, grinding, powder handling, and battery maintenance. Loose-fitting hoods are useful when facial seals cannot be achieved due to facial hair or accommodations. PAPRs must not be used in IDLH or oxygen-deficient atmospheres. Work programs require model-specific training, battery and airflow checks, and maintenance of filters, blowers, hoses, and headgear.
Using a PAPR in oxygen-deficient or IDLH atmospheres, where supplied-air or SCBA is required.
Incorrect filter or cartridge selection, or failing to replace components before breakthrough, compromising protection.
Poor maintenance and training, such as not checking blower function, airflow, seals, or batteries, and issuing PAPRs without model-specific instruction.