The Ruck 355mm ETAMASTER EC Inline Mixed Flow Fan EM 355 EC 01 is a high-efficiency diagonal fan designed for dependable and consistent ventilation performance. It features optimally tuned, CFD-optimized aerodynamics and a housing made from impact-resistant, reinforced polypropylene to provide durability in a range of installations. The fan is powered by a high-efficiency IE5 EC motor that offers stepless controllability, and it includes a potentiometer for connection within the terminal box. Suitable for continuous operation, it can convey medium temperatures up to 35 °C. As part of the ETAMASTER series, it has served as a benchmark for efficiency since 2012.