{"data":{"id":"us/42-cfr-84.156","jurisdiction":"us","citation":"42 CFR 84.156","heading":"Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements.","body":"(a) Inhalation resistance shall not exceed 50 millimeters (2 inches) of water at an air flow of 115 liters (4 cubic feet) per minute.\n(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.","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":"1a7b3d979fedc01a6f2e3b5f3b0ca61313b75d7dd5216644172f7e247af188b6","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-84.155","next":"us/42-cfr-84.157"},"notice":"GroundRules: Original legal text. Not legal advice."}