42 C.F.R. § 84.178

Breath response type, airflow resistance test—PAPR classes HE and PAPR100.

Last amended: 2020Year: 2026Length: 41 wordsSubsections: 2Official source

Cite as 42 C.F.R. § 84.178 (2026)

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.
Cross-references to the CFR
84.88.
42 C.F.R. § 84.178: Breath response type, airflow resistance test—PAPR classes HE and PAPR100. | Justis AI