{"data":{"id":"us/42-cfr-84.154","jurisdiction":"us","citation":"42 CFR 84.154","heading":"Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.","body":"(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.\n(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.\n(c) The exhalation resistance shall not exceed 25 mm. (1 inch) of water-column height at this flow rate.","path":["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 J—Supplied-Air Respirators"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"c9139c44d814dff79e9f0706c14435ced71496a588998a84ae30efd6c3aec43d","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-84.153","next":"us/42-cfr-84.155"},"notice":"GroundRules: Original legal text. Not legal advice."}