---
kind: "section"
citation: "42 C.F.R. § 84.154"
title: "42"
number: "84.154"
heading: "Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements."
url: "https://uscodex.org/cfr/42/84.154"
---

# §84.154. Airflow resistance test; Type B and Type BE supplied-air respirators; minimum requirements.

- (a) Airflow resistance shall be determined when the respirator is completely assembled with the respiratory-inlet covering and the hose in the maximum length to be considered for approval, coiled in loops 1.5 to 2.1 m. (5 to 7 feet) in diameter.
- (b) Airflow resistance shall not exceed 38 mm. (1.5 inches) of water-column height to air drawn at the flow rate of 85 liters (3 cubic feet) per minute.
- (c) The exhalation resistance shall not exceed 25 mm. (1 inch) of water-column height at this flow rate.

## 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.