The Helios HRFD 250/4/2 is an axial high-performance fan designed for use in ventilation technology. With a cylindrical tube made of galvanized steel sheet and flanges on both sides, this fan offers a robust and durable construction. The directly driven motor with Dahlander winding allows for flexible speed adjustment, while the dynamically balanced impeller with profiled plastic blades ensures high efficiency and optimized air flow. The fan is maintenance-free and equipped with low-noise ball bearings that provide long-term lubrication. These features make the HRFD 250/4/2 an ideal choice for applications that require reliable and powerful air circulation.

• Dynamically balanced impeller for high efficiency
• Maintenance-free, enclosed motor with long-term lubrication
• Flanges on both sides according to DIN 24155 for easy installation
• Optimized aerodynamic blades for maximum air flow.