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['Personal Protective Equipment']
['Respiratory Protection']
10/07/2026
§84.156 Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements.
(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.
['Personal Protective Equipment']
['Respiratory Protection']
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