The Elta SMB650/4 – 3AC is a high-performance 650mm mixed flow box fan equipped with a 4‑pole, 3‑phase AC motor. Designed for reliable air movement in demanding ventilation systems, this unit delivers airflow volumes up to 4.07 m³/s and manages static pressures reaching 796 Pa. Suitable for continuous operation in environments up to +60°C, this model is part of a versatile range of six sizes from 400mm to 700mm. The SMB650/4 – 3AC offers efficient, durable performance in both commercial and industrial ventilation applications.