['Specialized Industries']
['Mining']
07/19/2025
...
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.
['Specialized Industries']
['Mining']
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