The Ruck KVR 4020 E2 30 is a 1‑phase centrifugal box fan designed for reliable and efficient airflow performance. It features a backward curved centrifugal impeller that delivers stable ventilation across a wide range of applications. The housing is made from galvanized sheet steel, offering strength and long-term durability. The removable fan unit provides easy access for cleaning and maintenance. A robust single-phase AC motor allows stepless speed control, making it suitable for adjustable airflow requirements. This model supports continuous operation with conveyed medium temperatures up to 45°C. It is a practical solution for commercial and industrial ventilation systems needing a dependable and straightforward centrifugal fan.