I bought the ionic breeze because I have many allergies and severe asthma. Although I didn't really notice a difference in my symptoms after setting up my ionic breezes (I have two, one in my bedroom and one in the living room), whenever I cleam off the filters, they are covered in black dust, so I have to assume that they are cleaning out the air. The ionic breezes are easy to maintain and clean...all you have to do is wipe off the filter with a wet cloth, and then a dry one, and you are all set. They are also silent, so you can have them anywhere in your house without being disturbed by...review »