The HELI SB 125 C SILENTBOX duct fan from Helios is a highly advanced ventilation fan specifically designed for quiet operation. With a sound-insulated housing made of galvanized steel and a sound-absorbing inner lining, this fan provides an effective solution for applications where a quiet environment is required. The fan is equipped with a high-performance drum impeller that ensures efficient airflow. The design allows for easy access to the fan chamber and housing spiral, facilitating maintenance. The motor is maintenance-free and offers flexible speed control through voltage reduction, making it a versatile choice for various ventilation needs.

• Sound-insulated housing with sound-absorbing inner lining
• High-performance drum impeller with forward-curved blades
• Maintenance-free external rotor motor with thermal contacts
• Dynamic balancing for vibration-free operation
• Easy accessibility for maintenance and cleaning.