Code of Federal Regulations · Section

§ 77.212 — Draw-off Tunnel Ventilation Fans; Installation

30 C.F.R. § 77.212

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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.

30 C.F.R. § 77.211 30 C.F.R. § 77.213

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