Industrial Ventilation/ Exhaust Fans used as Poultry/Greenhouse/Animal husbandryEquipments Shutter:with a centrifugal system is used which can ensure the shutter open and close autimatically, and makes it dustproof,waterproof in centrifugal ventilation fans.Motor: high efficient and energy-saving mator with protection grade: IP55, insulation class:FBelt: Autimatic tensioner to prevent the belt loosinganddropping off. ModelDiameter Blades (mm) Air VolumePowerOuter size (mm) VoltageFrenquencyETXS-1000100035000m3/h0.75KW1100X1100X450380V50HZETXS-1250125042000m3/h1.1KW1378X1378X450380V50HZETXS-1400140055800m3/h1.5KW1536X1536X450380V50HZ