Health is one of the most important factors to having a great quality of life. The E.P.A. published a study that found "the indoor air in your home or work place is ALWAYS 2-5 more polluted than the worst exterior air". In the average home over 40 lbs. of dust accumulate annually. This dust is made up of mites, pollen, bacteria, viruses, human and animal dander, insecticides, and many other harmful compounds.