There are numerous makes and models of air purifier available and the best one for you will depend on the type of impurities that you are trying to remove. If you are looking for an air purifier that removes odors as well as cleaning the air, you are  faced with a number of choices.

There was a recent lawsuit filed in the US by a major ionic air purifier manufacturer who claimed that a consumer report about their air purifiers was a product defamation. The report in question claimed that the tested air purifier system removed very little matter from the air and that it significantly raised ozone levels.