The HELI HRFD25/4 high-performance fan from Helios is a powerful axial fan designed for use in various ventilation applications. With a cylindrical duct made of galvanized steel sheet and flanges on both sides, this fan offers a robust and durable construction. The directly driven motor enables efficient performance, while the dynamically balanced impeller with profiled plastic blades ensures optimized air circulation. The fan is suitable for a duct diameter of 250 mm and can be controlled in speed through voltage reduction. Thanks to its enclosed design and low-noise ball bearings, the fan is maintenance-free and provides reliable performance over an extended period. With an air flow rate of up to 950 m³/h, the HELI HRFD25/4 is ideal for applications requiring effective ventilation.

• IP55 protection class for high resistance to dust and water
• Thermal contacts for additional overheating protection
• Maintenance-free design with long-term lubrication of the ball bearings
• Optimized aerodynamic blades for maximum efficiency.