Sofasco International is a designer, manufacturer and distributor of high quality, cost effective , RoHS, certified AC cross flow fans, (voltages 110v – 120v & 220v -240v ) in AC capacitor as well as shaded pole motors. We maintain facilities in USA and China. Our crossflow fans, often referred to as tangential or blower wheel fans, will generate a wide, even flow of air parallel to the unit being cooled, insuring greater efficiencies and lower noise ratios per cfm when compared with axial fans. Impellers range in size from 60mm to 110mm in wheel diameter for an ac capacitor type motor and from 30mm to 60mm in wheel diameter for a shaded pole motor. The fan’s motor location can be changed from the right side to the left side by the factory at the customer’s request. Additional modifications allow two impellers to be mounted to a single motor, one impeller on either side of the motor housing. 3rd wire options are also available on all crossflow fans: signal-rotation detection, signal-frequency generator function as well as temperature control for operating environments where noise and temperature are a consideration. Various speeds are also available.