42 CFR 84.178
§ 84.178 Breath response type, airflow resistance test—PAPR classes HE and PAPR100.
United States · 42 CFR — Public Health · Status: effective
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- Citation
- 42 CFR 84.178, § 84.178 Breath response type, airflow resistance test—PAPR classes HE and PAPR100, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/201787
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Full text
Resistance to airflow will be measured with a breathing machine as described in § 84.88.
(a) Minimum inhalation resistance must be greater than zero mm of water-column height.
(b) Maximum exhalation resistance must be less than 89 mm of water-column height.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.