It is suitable for ventilation in large garages, workshops, warehouses, sports halls, theaters and other places. It has excellent anti-corrosion performance, low noise, reliable operation, no need to install ventilation ducts, and is easy to disassemble and maintain. This machine has a large air volume and lower pressure than the Type II centrifugal type. The applicable medium temperature is -20°C to 60°C. The transported gas is not allowed to contain excessive viscous substances, and the dust content is ≤150mg/m3.