GroundRules
42 CFR 84.122: Breathing resistance test; minimum requirements.
Where this section sits in the code
- Title 42—Public Health
- CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES
- SUBCHAPTER G—OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES
- PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
- Subpart I—Gas Masks
(a) Resistance to airflow will be measured in the facepiece or mouthpiece of a gas mask mounted on a breathing machine both before and after each test conducted in accordance with §§ 84.124, 84.125, and 84.126, with air flowing at a continuous rate of 85 liters per minute.
(b) The maximum allowable resistance requirements for gas masks are as follows:
Maximum Resistance
[mm. water-column height]
Type of gas mask Inhalation Exhalation
Initial Final 1
Front-mounted or back-mounted (without particulate filter) 60 75 20
Front-mounted or back-mounted (with approved particulate filter) 70 85 20
Chin-style (without particulate filter) 40 55 20
Chin-style (with approved particulate filter) 65 80 20
Escape (without particulate filter) 60 75 20
Escape (with approved particulate filter) 70 85 20
1 Measured at end of the service life specified in Tables 5, 6, and 7 of this subpart.
Collected 2026-08-27T02:26:11Z. Source file · JSON