Helios Fans KRW 225÷2÷50÷25

The Helios KRW 225÷2÷50÷25 is a centrifugal fan designed for installation in rectangular duct systems. Its compact housing is constructed from galvanized steel and includes standardized flanged edges on both sides for secure duct integration. The space-saving design features a swing-out motor and impeller assembly, allowing easy access for maintenance.

This model utilizes a high-efficiency radial impeller with backward curved blades, made from both plastic and galvanized steel, to deliver strong airflow performance. It ensures smooth and quiet operation thanks to dynamic balancing in line with quality grade G 6.3 of DIN ISO 1940 T.1.

Powered by a maintenance-free single-phase AC external rotor motor, the fan includes a sealed design and integrated thermal contacts that reset automatically. The motor winding is moisture-protected through impregnation. Speed can be regulated either continuously using electronic controls or in steps via a 5‑step transformer. Long-life, low-noise ball bearings and a pre-wired IP44-rated terminal box complete the unit’s durable and quiet operation.