42 C.F.R. § 84.156 Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements.
Title 42 - Public Health
(a) Inhalation resistance shall not exceed 50 millimeters (2 inches) of water at an air flow of 115 liters (4 cubic feet) per minute. (b) The exhalation resistance to a flow of air at a rate of 85 liters (3 cubic feet) per minute shall not exceed 25 millimeters (1 inch) of water.
Title 42: Public Health
PART 84—APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
Subpart J—Supplied-Air Respirators
§ 84.156 Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements.
