With indoor air quality becoming a growing concern, most homeowners are still not aware of the level of pollution inside of their home. The Environmental Protection Agency has ranked poor indoor air pollution among the top 5 risks for public health multiple years in a row. Without even knowing, your air duct system could be contaminated with particulates that are harmful for you and your family to breathe. Each time your heating and cooling system turns on, it can circulate dust, dust mites, animal dander, pollen and bacteria throughout the air inside your home.