42 CFR 84.154
§ 84.154 Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.
United States · 42 CFR — Public Health · Status: effective
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- Citation
- 42 CFR 84.154, § 84.154 Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/201767
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Full text
(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.
(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.
(c) The exhalation resistance shall not exceed 25 mm. (1 inch) of water-column height at this flow rate.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.