The Ruck KVR 6035 E4 30 is a 1‑phase centrifugal box fan designed for dependable airflow performance in general ventilation applications. It features a backward curved centrifugal impeller that provides efficient and stable air movement. The housing is constructed from galvanized sheet steel, offering durability and corrosion resistance for long-term use. A removable fan unit is included to simplify maintenance and servicing. The robust single-phase AC motor is steplessly controllable, allowing the airflow to be adjusted as required. This model is suitable for continuous operation with conveyed medium temperatures up to 40°C. It is a practical choice for commercial and industrial systems needing a reliable centrifugal box fan.