... 1-100-130, airflow: 1900m3/h 3, Low noise ventilation fanec centrifugal ventilation fan Backward Curved Type: SC310E3-ACT-00EC exhaust fan1,Energy ... as bus fan and blowers, small car fan, refrigeration cars 3.Household appliances fans/blowers, for example: cooker hood fan4.Ventilation, air-conditioning ... 2012 CHICAGO, welcome you all to visit our booth. ec ventilation fan backward curved diameter 310MM