The HELI HRFD 315/4 axial high-performance fan from Helios is a powerful ventilation fan designed for use in various 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 fan is equipped with a high-performance impeller optimized with profiled plastic blades to ensure efficient air circulation. The dynamic balancing of the impeller ensures quiet operation, while the three-phase short-circuit rotor motor allows for flexible speed control. The fan is maintenance-free and features low-noise ball bearings with long-term lubrication, making it an ideal choice for applications where reliable and quiet ventilation is required.

• Dynamically balanced impeller for quiet operation
• Maintenance-free motor with thermal contacts
• Energy-efficient speed control through voltage reduction
• Robust construction made of galvanized steel sheet with flanges on both sides.