The Ruck 280mm ETAMASTER EC Inline Mixed Flow Fan EM 280 EC 01 is a high-efficiency diagonal fan designed for reliable ventilation applications. It incorporates optimally tuned, CFD-optimized aerodynamics and a housing made of impact-resistant, reinforced polypropylene. The fan is equipped with a high-efficiency IE5 EC motor that is steplessly controllable and includes a potentiometer for connection in the terminal box. It is capable of conveying medium temperatures up to 45 °C in continuous operation and has been a benchmark for efficiency since 2012.