Fire exhaust fan in many occasions can be used, however, this is also faced with a problem, that is, different locations in different environments fire exhaust fan installed, so that a lot of consumers are tangled such problems. Well, today, in this small series to fire exhaust fan installed in the main location in the tunnel, a brief fire exhaust fan installed on the issue. Fire exhaust fan installed in the choice of location, you should be sure to pay attention to the distance from the fan side wall of the tunnel should not be too close, so as not to affect the ventilation. Fire exhaust fan arranged the minimum distance from the tunnel wall 20cm, the rescue "sentinel" setting will tunnel into different disaster prevention area, make full use of exhaust fan fire deviated and fixed at both ends of the tunnel as a rescue station into the fresh air and exhaust passages, ventilation must be maintained in the cross-channel port positive pressure to prevent the flue gas flow channel. The accident tunnel ventilation system blows air through the secure tunnel to cross the channel, inhibiting the flue gas into a cross-channel and tunnel accident did not occur to meet the evacuees facing fresh air into the tunnel cross passages and safety, while ensuring that the required waiting area Fresh air. According to different regions of the accident in the tunnel with different disaster prevention ventilation. "Sentinel" Disaster ventilation program implementation sentinel relief when the train set may be reversed in the "sentinel" range for all of the cross-channel fan made contact with fresh air from within the security tunnel. 

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