The Ruck ISOR 500 E4 K 01 is a fully insulated 500mm single box fan designed for quiet, reliable, and efficient ventilation. It features a backward curved centrifugal impeller housed in galvanized sheet steel for durability and stable performance. Connection spigots with double lip seals ensure secure and leak-resistant airflow. The swing-out fan unit allows easy access for maintenance. Powered by a robust single-phase AC motor with voltage control, the fan also includes an integrated thermal switch to enhance operational safety. Suitable for outdoor installation, this model offers dependable performance across a wide range of ventilation applications.