This is a compact yet powerful platform air purifier with dual and triple power structures. It is the first Coway model that can be expanded to suit each space and requirement with minimal additional cost. The Chinese AP-2517E model indicates filter life and PM 2.5 contamination on its front as well as expressing information such as fan speed and contamination level through lighting and animation. The AP-2017C’s front design makes it possible to check filter life and timer settings on the back of the front cover with the round AQI that forms a part of Coway's identity.