The HELI VARD 225/4 TK RADAX high-pressure duct fan from Helios is a powerful ventilation fan designed for use in demanding applications. With its cylindrical duct sleeve and flanges on both sides, it allows for easy installation in existing duct systems. The fan is directly driven and features a semi-axial impeller with eight spatially curved blades made of thermoplastic, ensuring efficient air circulation. The construction from galvanized steel sheet provides durability and resilience, while the built-in guide wheel optimizes performance. The fan offers vibration-free operation, achieved through dynamic balancing according to quality levels G 6.3 VDI 2060 and DIN ISO 1940. Additionally, the motor is maintenance-free and equipped with low-noise ball bearings that provide long-term lubrication.

• Three-phase squirrel-cage motor with thermal contacts for increased safety
• Built-in guide wheel for performance optimization
• Vibration-free operation through precise dynamic balancing
• Maintenance-free operation thanks to closed construction and long-term lubrication
• Suitable for duct diameters of 225 mm with an air flow rate of 880 m³/h.