Mine doors with dampers are the physical control points that make all of that manageable. That is why they are in every serious underground ventilation system. If you have more queries about underground ventilation systems, you can contact Zacon. They are a reputed name in the industry. Just contact our toll-free number: +1 888 298 3111 or telephone: +1 705 897 2002.
Website: https://www.zacon.ca/contact