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

For Supplied-Air Respirator (SAR), facepiece is Helmet/hood; operating mode is Continuous flow mode; assigned protection factor is 25/1,000; jurisdiction is Title 8, Section 5144; conditions is The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25, recorded from its source on 2026-08-10.

- **Respirator type:** Supplied-Air Respirator (SAR) _(verified: appears in the quote below)_
- **Facepiece:** Helmet/hood _(our reading, not quoted from the source)_
- **Operating mode:** Continuous flow mode _(verified: appears in the quote below)_
- **Assigned protection factor:** 25/1,000 _(verified: appears in the quote below)_
- **Jurisdiction:** Title 8, Section 5144 _(our reading, not quoted from the source)_
- **Conditions:** The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25. _(verified: appears in the quote below)_

## What the source says

> 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 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... | mode (e.g., open/closed circuit). | | | | | | | Notes: | | | | | | 1. Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | | | | | | 2. The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section, including training, fit testing, maintenance, and use requirements. | | | | | | 3. This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | | | | | | 4. The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 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/).