The Helios Fans ITEC 400 provides dependable twin fan operation with a 100% standby feature, ensuring continuous airflow in duct systems. Constructed with a robust galvanized steel casing, it offers excellent corrosion resistance for durable performance. The unit includes an access panel that can be positioned at either the top or bottom for convenient maintenance. It comes with standard change-over panels and a duty-sharing option to balance fan usage, complemented by simple wiring through a common terminal box. Acoustic lining minimizes noise and sound breakout, ensuring quiet operation. Installation is made easy with standard side mounting rails. Speed control is achieved through the Helios ACSW EC change-over panel and the PA10 potentiometer speed controller, delivering an efficient and user-friendly ventilation solution.