The Ruck 355mm EM DUO EC Twin Box Fan is a high-performance ventilation solution designed for quiet and reliable operation. It features an efficient diagonal fan with redundant operation and aerodynamically optimized design for maximum airflow. The fan is housed in a soundproof galvanized sheet steel casing and includes a high-efficiency EC motor with stepless control. Integrated ETAMASTER technology ensures maximum efficiency, and the fan is suitable for outdoor installation, making it ideal for applications requiring durable, low-noise ventilation.