Centrifugal FanModel No. : 4-72Application : This series widely applicable for the indoor ventilation in the building,hotel,restaurants, industrial and mining etc.The fan exchange simple air ,non-hypergolic,non-corrosive and innocuous gas,and glutinous matter will be not allowed ,dust or particulate mass should not exceed 150mg/m3,and gas temperature not exceed80°C.Note: Follows is important when you inquiry us (and pls info us know follow infomation): 1) Voltage and frequency based on customer requirement. 2) Where its use for? 3) Air flow (m3/h)? 4) Pressure(Pa)? 5) Quantity? 6) Others :other details if you need . Performance parameter