---
kind: "section"
citation: "30 C.F.R. § 57.22208"
title: "30"
number: "57.22208"
heading: "Auxiliary fans (I-A, II-A, III, and V-A mines)."
url: "https://uscodex.org/cfr/30/57.22208"
---

# §57.22208. Auxiliary fans (I-A, II-A, III, and V-A mines).

- (a) Auxiliary fans, except fans used in shops and other areas which have been so designed that methane cannot enter the airway, shall be approved by MSHA under the applicable requirements of [30 CFR part 18](/cfr/30/part18.md), and be operated so that recirculation is minimized. Auxiliary fans shall not be used to ventilate work places during the interruption of normal mine ventilation.
- (b) Tests for methane shall be made at auxiliary fans before they are started.

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 52 FR 24941, July 1, 1987, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.