053-5 Wyo. Code R. § 77.212
Current through April 27, 2019
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.
053-5 Wyo. Code R. § 77.212