Helios Fans AMD 225/4

The Helios AMD 225/4 is a medium-pressure axial fan engineered for industrial and commercial ducted ventilation systems. It features a 225mm diameter galvanized steel cylindrical casing with flanges according to DIN 24155 Part 3, enabling seamless duct integration.

Powered by a direct-drive, 3‑phase 4‑pole motor, the fan delivers lower rotational speed than 2‑pole models, making it ideal for applications requiring quieter operation and moderate airflow. The 14-blade aerodynamically optimized polymer impeller ensures stable airflow with low vibration and noise, dynamically balanced to DIN ISO 1940 – 1 (class 6.3).

This model includes a maintenance-free motor with sealed-for-life ball bearings, built-in thermal contacts, and IP54 protection, making it suitable for continuous operation in demanding environments. It is also speed-controllable via voltage reduction, allowing flexible performance adjustment.

The AMD 225/4 offers reliable airflow performance and efficient heat dissipation, suitable for air temperatures up to 40°C (controlled) or 60°C (uncontrolled). Its construction makes it perfect for HVAC systems, industrial machinery ventilation, and controlled environments where durability and efficiency are essential.

Whether used for supply or extract ventilation, the Helios AMD 225/4 provides robust performance, low noise, and long-term reliability in a compact, easy-to-install unit.