Noise-encapsulated EC radial fan with swing-out motor impeller unit and motor located outside the air flow. Double-walled housing made of galvanized sheet steel, soundproofed by lining with 30 mm thick mineral wool insulation panels. Suction and pressure side pipe connection nozzles with rubber lip seals matched to standard diameters. Fan door can be fully swung out for inspection and cleaning. Incl. stable mounting rails with four vibration dampers. Comes as standard with condensate drain and drip protection when the door is open. High-performance radial impeller with backwards curved blades made of galvanized sheet steel, mounted directly on the motor shaft. Good efficiency, low noise. Vibration-free operation thanks to dynamic balancing in accordance with quality level G 6.3 VDI 2060 and DIN ISO 1940. Driven by energy-saving, speed-controlled EC external rotor motor with protection class IP55 with maximum efficiency. Maintenance-free and interference-free, ball bearings. Integrated electronic temperature monitoring for EC motor and electronics. If the maximum permissible temperatures are exceeded, the speed and power are automatically adjusted. Stepless speed control with potentiometer or stepless speed regulation with universal control system. Connection via standard terminal box (IP55) on the outside of the motor.