The Elta SMB650/4 – 1AC is a robust 650mm mixed flow box fan designed to provide efficient air movement in commercial and industrial settings. Powered by a 4‑pole, 1‑phase AC motor, it delivers airflow volumes up to 4.07 m³/s and handles static pressures up to 796 Pa. This fan supports continuous operation in environments with temperatures up to +60°C. As part of a six-model range from 400mm to 700mm, the SMB650/4 – 1AC combines high performance with reliable operation for general and specialist ventilation applications.