EC axial high-performance fan Cylindrical tube made of galvanized sheet steel, enclosing the impeller, flange molded on both sides, hole pattern according to DIN 24155, terminal box as standard (protection class IP 54) on the outside of the tube. Impeller with high-performance characteristics with profiled blades made of plastic, aerodynamically optimized for the application, dynamically balanced. Energy-saving, speed-controlled EC external rotor motor with protection class IP 44 with maximum efficiency. Maintenance-free and free from radio interference, excellent electromagnetic compatibility (EMC), ball bearings. Integrated electronic temperature monitoring for EC motor and electronics. Can be controlled continuously via speed potentiometer. Control via three-stage switch or continuously via universal control system or electronic differential pressure/temperature controller.