1. LawStack
  2. Title 42 - Public Health
  3. Chapter I - PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES
  4. Subchapter G - OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES
  5. Part 84 - APPROVAL OF RESPIRATORY PROTECTIVE DEVICES
  6. Subpart K - Air-Purifying Particulate Respirators
  7. 42 CFR § 84.178
42 CFR § 84.178
Breath response type, airflow resistance test—PAPR classes HE and PAPR100
June 11, 2020
CFR

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.

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§ 84.177 Total noise level test—PAPR classes HE and PAPR100
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§ 84.179 Silica dust loading test—PAPR series HE filtration

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