42 C.F.R. § 84.154 Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.
Title 42 - Public Health
(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.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart J—Supplied-Air Respirators
§ 84.154 Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.
