Ebm-Nadi International Pvt. Ltd. Specializes in the designing and creating of fans incorporating the external rotor motor concept. Ebm-Nadi International Pvt. Ltd. Offers Radial fans from ebm-Nadi have backward curved blades. Both versions are available in AC and EC versions. These fans are based on the external rotor motor concept. Radial fans available with backward curved blades are used primarily for intake suction and do not require a spiral housing. They have high hydraulic efficiency.