The Ruck ISOR 355 EC K 01 is a fully insulated 355mm single box fan designed for quiet, efficient, and reliable airflow in a variety of ventilation systems. It features a backward curved centrifugal impeller housed in galvanized sheet steel, with connection spigots fitted with double lip seals for secure and airtight installation. The swing-out fan unit allows convenient maintenance access. Equipped with an external rotor EC motor, the fan provides stepless speed control for precise and energy-efficient operation. Internal electronic temperature monitoring ensures safe and dependable performance. Suitable for outdoor installation, this model delivers high-efficiency ventilation for commercial, industrial, and specialist applications.