---
kind: "section"
citation: "30 C.F.R. § 77.212"
title: "30"
number: "77.212"
heading: "Draw-off tunnel ventilation fans; installation."
url: "https://uscodex.org/cfr/30/77.212"
---

# §77.212. Draw-off tunnel ventilation fans; installation.


When fans are used to ventilate draw-off tunnels the fans shall be:

- (a) Installed on the surface;
- (b) Installed in fireproof housings and connected to the tunnel openings with fireproof air ducts; and,
- (c) **Offset from the tunnel opening.**

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 36 FR 9364, May 22, 1971, unless otherwise noted.