Reference Source

Air-Purifying Respirator

For Air-Purifying Respirator, facepiece is Quarter mask; assigned protection factor is 5; jurisdiction is 29 CFR 1910.134, recorded from its source on 2026-08-10.

Respirator type
Air-Purifying Respirator verified
Facepiece
Quarter mask our reading
Assigned protection factor
5 verified
Jurisdiction
29 CFR 1910.134 our reading
Sourceecfr.gov
Verified
Review by
DatasetRespirator assigned protection factors — federal OSHA and Cal/OSHA, with maximum use concentrations

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | |

ecfr.gov, retrieved 2026-08-10

Source

Last verified against source: . Due for re-check by . This page as Markdown · OKF bundle · full dataset as JSON.