Proper selection of fans depending on the systems needs is critical to reduce the hazards in mining applications. Primary fans may be used at either intake, where air is directed to a tunnel entryway or mineshaft (push air), or exhaust, where air is directed away from a tunnel system (pull air). The biggest factors are to direct the air into areas that are presently being used, and cut areas that are not being used, which may help improve efficiency and reduce operational costs. Flow can be controlled using controllers and walls, reducing the airflow into certain areas. Flow rates are measured to provide adequate ventilation, detect and repair leaks, and check operating points for all fans in a system. Even with these measurements, there are times when the flow rate or pressure is inadequate. An accessory fan, or a booster fan, may be brought in to offset the extra airflow. The best way to make sure that the proper fan choice is made, for either the main or auxiliary fans, for a mining application is to talk with a knowledgeable engineer. Detailed application information, such as flow and pressure requirements, along with any challenges encountered in past installations, as well as details of the site and environment, should be provided up front to guide the selection. The New York Blower Company has the experience and technical capabilities needed to choose the most effective blower depending on specific application requirements. Contact your local representatives to talk about your specific mine and tunnel ventilation requirements, or for a quotation.