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

For Powered Air-Purifying Respirator (PAPR), facepiece is Full facepiece; assigned protection factor is 1,000; jurisdiction is Title 8, Section 5144, recorded from its source on 2026-08-10.

- **Respirator type:** Powered Air-Purifying Respirator (PAPR) _(verified: appears in the quote below)_
- **Facepiece:** Full facepiece _(our reading, not quoted from the source)_
- **Assigned protection factor:** 1,000 _(verified: appears in the quote below)_
- **Jurisdiction:** Title 8, Section 5144 _(our reading, not quoted from the source)_

## What the source says

> 2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |

## Source

- https://www.dir.ca.gov/title8/5144.html

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/).