# Air-Purifying Respirator — Respirator assigned protection factors — federal OSHA and Cal/OSHA, with maximum use concentrations

For Air-Purifying Respirator, facepiece is Full facepiece; assigned protection factor is 50; jurisdiction is 29 CFR 1910.134, recorded from its source on 2026-08-10.

- **Respirator type:** Air-Purifying Respirator _(verified: appears in the quote below)_
- **Facepiece:** Full facepiece _(our reading, not quoted from the source)_
- **Assigned protection factor:** 50 _(verified: appears in the quote below)_
- **Jurisdiction:** 29 CFR 1910.134 _(our reading, not quoted from the source)_

## 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 | | |

## Source

- https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134

Last verified: 2026-08-10. Review by: 2028-08-09.
Part of [Respirator assigned protection factors — federal OSHA and Cal/OSHA, with maximum use concentrations](https://referencesource.org/respirator-assigned-protection-factors/).