The Ruck ISOR 355 E4 K 01 is a fully insulated 355mm single box fan designed for quiet and efficient ventilation in various applications. It is equipped with a backward curved centrifugal impeller and a galvanized sheet steel housing, providing durability and stable performance. Connection spigots feature double lip seals to ensure secure airflow. The swing-out fan unit allows easy access for maintenance. The robust single-phase AC motor is voltage controllable and includes an integrated thermal switch for safe operation. Suitable for outdoor installation, this fan offers dependable and long-lasting performance in demanding environments.