42 CFR 84.172
§ 84.172 Airflow resistance test.
United States · 42 CFR — Public Health · Status: effective
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- Citation
- 42 CFR 84.172, § 84.172 Airflow resistance test, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/201781
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Full text
(a) Resistance to airflow will be measured in the tight-fitting respiratory inlet covering of a complete particulate respirator mounted on a test fixture with air flowing at continuous rate of 85 ±2 liters per minute, before each test conducted in accordance with § 84.173.
(b) Resistance of a complete tight-fitting powered air-purifying particulate respirator system will be measured with the blower off if the manufacturer indicates that the respirator should not be doffed in the event of a blower failure.
(c) The maximum allowable resistance requirements for air-purifying particulate respirators are as follows:
Maximum Resistance
[mm 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.