Home Appliances Design Air Clarity Air Cleaner by CHANG-YU PAN Air Clarity is an indoor air cleaner. This air cleaner is covered in a glass shell; the design purpose, by the concept of Design Visibility, is to see how the filter works. It reminds users to change it when it is dirty so that pollution can be avoided while the dirty filter is still being used. The pre-filter can be changed easily and no powdery dust will be spread. By the clear glass shell, It can provide a sense of refreshment as well.