30 CFR 77.212 – Draw-off tunnel ventilation fans; installation
Current as of: 2024 | Check for updates
|
Other versions
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.