This fan is a newly improved product characterized by high static pressure, smooth operation, low noise, simple installation, compact size, and direct pipe connection capability. It is widely used for ventilation in both industrial enterprises and civil buildings, handling non-corrosive, non-combustible, and harmless gases. The gas must not contain sticky materials, and dust or hard particle content should be less than 120 mg/m³. The operating temperature range is -20°C to 60°C.