Ebm - NADI International Pvt. Ltd offers AC and EC version of Radial Fans. Ebm - NADI International Pvt. Ltd supplies several designs of fans and motors. The AC and EC version of Radial Fans have backward curved blades. Radial fans with backward curved blades are used primarily for intake suction and do not require a spiral housing. The blades have high hydraulic efficiency. These AC and EC radial fans are based on the external rotor motor concept.