Tunnel fans are specifically designed for ventilation in tunnels, mines, or underground spaces. They are built to handle heavy airflow demands while overcoming the high resistance posed by tunnel structures. These fans are designed for durability and safety, ensuring adequate airflow in harsh, confined environments. Tunnel fans are typically used in underground mining operations, road and rail tunnels, and ventilation systems for large industrial spaces. Their performance is critical in ensuring air quality and safety in such environments.