All Alpine Air Living purifiers are designed to be almost maintenance-free. However, the little cleaning involved is very easy to do and takes almost no time. How often you will have to clean your unit depends on how polluted your indoor environment is. In case of a severely polluted environment, during the first few weeks of operation, you might have to clean the unit once every week or two weeks. However afterward, it can be cleaned only once a month. If you don't have a severely polluted environment, you will clean the unit a lot less. Please refer to your owner's manual for more details.