Regulations last checked for updates: Nov 22, 2024

Title 42 - Public Health last revised: Nov 19, 2024
§ 84.154 - Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.

(a) Airflow resistance shall be determined when the respirator is completely assembled with the respiratory-inlet covering and the hose in the maximum length to be considered for approval, coiled in loops 1.5 to 2.1 m. (5 to 7 feet) in diameter.

(b) Airflow resistance shall not exceed 38 mm. (1.5 inches) of water-column height to air drawn at the flow rate of 85 liters (3 cubic feet) per minute.

(c) The exhalation resistance shall not exceed 25 mm. (1 inch) of water-column height at this flow rate.

authority: 29 U.S.C. 651
source: 60 FR 30355, June 8, 1995, unless otherwise noted.
cite as: 42 CFR 84.154