---
kind: "section"
citation: "42 C.F.R. § 84.156"
title: "42"
number: "84.156"
heading: "Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements."
url: "https://uscodex.org/cfr/42/84.156"
---

# §84.156. Airflow resistance test; Type C supplied-air respirator, demand class; minimum requirements.

- (a) Inhalation resistance shall not exceed 50 millimeters (2 inches) of water at an air flow of 115 liters (4 cubic feet) per minute.
- (b) The exhalation resistance to a flow of air at a rate of 85 liters (3 cubic feet) per minute shall not exceed 25 millimeters (1 inch) of water.

## Notes

### Authority

Authority: 29 U.S.C. 651 et seq.; 30 U.S.C. 3, 5, 7, 811, 842(h), 844.

### Source

Source: 60 FR 30355, June 8, 1995, unless otherwise noted.