This article features high pressure EC fans with backward curved blades, suitable for industrial cooling and ventilation applications. It highlights variable speed control options like PWM and RS485 for precise performance management, and covers various impeller diameters from 133mm to 630mm. Designed with versatile voltage options (115V, 230V, 400V) and power ratings up to 700W, making it ideal for high-demand environments requiring efficient airflow and customizable controls.