The HELI SB EC 400 B SILENTBOX duct fan from Helios is a highly advanced EC radial duct fan specifically designed for quiet operation. With a sound-insulated housing made of galvanized steel, this fan provides an effective solution for ventilation in various applications. The sound-absorbing interior lining and the 50 mm thick mineral fiber board ensure significant noise reduction. The fan chamber and housing spiral are easily accessible, facilitating maintenance and operation. Equipped with an energy-saving, speed-controllable EC external rotor motor, the fan not only offers high efficiency but also features integrated electronic temperature monitoring. The stepless speed control allows for precise adjustment to meet specific requirements, while the ball-bearing motor ensures maintenance-free operation. This fan is ideal for applications where quiet and efficient ventilation is required.

• Sound-insulated housing for quiet operation
• Energy-saving radial impeller with backward-curved blades
• Speed-controllable EC external rotor motor with high efficiency
• Integrated electronic temperature monitoring
• Maintenance-free, ball-bearing motor.