{"data":{"id":"us/42-cfr-84.203","jurisdiction":"us","citation":"42 CFR 84.203","heading":"Breathing resistance test; minimum requirements.","body":"(a) Resistance to airflow will be measured in the facepiece, mouthpiece, hood, or helmet of a chemical cartridge respirator mounted on a test fixture with air flowing at a continuous rate of 85 liters per minute, both before and after each test conducted in accordance with §§ 84.206 through 84.207.\n(b) The maximum allowable resistance requirements for chemical cartridge respirators are as follows:\nMaximum Resistance\n[Millimeter water column height]\nType of chemical-cartridge respirator Inhalation Exhalation\nInitial Final 1\nOther than single-use vinyl chloride respirators:\nFor gases, vapors, or gases and vapors 40 45 20\nFor gases, vapors, or gases and vapors, and particulates 50 70 20\nSingle-use respirator with valves:\nFor vinyl chloride 20 25 20\nFor vinyl chloride and particulates 30 45 2\nSingle-use respirator without valves:\nFor vinyl chloride 15 20 (2)\nFor vinyl chloride and particulates 25 40 (2)\n1 Measured at end of service life specified in Table 11 of this subpart.\n2 Same as inhalation.","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 L—Chemical Cartridge 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":"31abc27698b336c024978f1597e59db692f9c99d134ea215b3f88ecb15dc9776","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-84.202","next":"us/42-cfr-84.204"},"notice":"GroundRules: Original legal text. Not legal advice."}