The HELIOS KRD 450/4/70/40 duct fan is a powerful duct radial fan specifically designed for direct mounting in rectangular duct systems. With a robust housing made of galvanized steel and standardized duct flange profiles, this fan offers a space-saving design while being service-friendly. The pivoting motor-impeller unit allows for easy maintenance and handling. The fan is equipped with a high-performance radial impeller featuring backward-curved blades made of plastic and galvanized steel, ensuring vibration-free operation. The drive is provided by a three-phase external rotor motor, allowing for flexible speed control. The closed design and low-noise ball bearings contribute to the longevity and efficiency of the device. The HELIOS KRD 450/4/70/40 is thus a reliable solution for demanding ventilation applications.

• Backward-curved impeller blades for high efficiency
• Pivoting motor-impeller unit for easy maintenance
• Three-phase external rotor motor with flexible speed control
• Vibration-free operation due to dynamic balancing according to quality class G 6.3
• Maintenance-free, low-noise ball bearings with long-term lubrication.