The Ruck 400mm ETAMASTER EC Inline Mixed Flow Fan EM 400 EC 01 is a high-efficiency diagonal fan designed for reliable ventilation performance. It incorporates optimally tuned, CFD-optimized aerodynamics to support efficient airflow and features a housing made from impact-resistant, reinforced polypropylene for long-term durability. The unit is equipped with a high-efficiency IE5 EC motor that is steplessly controllable and includes a potentiometer for straightforward connection in the terminal box. Suitable for continuous operation, it can handle medium temperatures up to 40 °C. As part of the ETAMASTER range, it has been recognised as a benchmark for efficiency since 2012.