The Elta SMB550/4 – 3AC is a high-performance 550mm mixed flow box fan engineered for efficient ventilation in commercial and industrial environments. Equipped with a 4‑pole, 3‑phase AC motor, this model delivers powerful airflow rates of up to 4.07 m³/s and can handle static pressures up to 796 Pa. Designed for reliable operation in temperatures up to +60°C, it suits a wide range of air movement tasks. The SMB550/4 – 3AC is one of six models in the 400mm to 700mm range, offering flexibility and performance for demanding airflow applications.