... fan,Centrifugal fan,Exhaust fan,Duct fan,Ventilation fan,Draught fan,Exhaust blower,Draft fan,small fan:Duct fan:Capacity:290m3/h~1875m3 ... used in central air conditioning units, special air conditioners, rail ventilation and Bio-safety cabinet Industry.Model: 133/190 and 146 ... /190mm are very popular in rail ventilation. The voltage can be 115V, 220V, 380V and 415V.Also ...