Household air ducts perform many essential functions as they circulate air in the home to allow effective heating and cooling systems to work in all the rooms. Cleaner air ducts allow consistent respiratory and temperature comfort in the entire house throughout all seasons. The air that circulates in your air duct basically travels your entire home multiple times a day so whatever spreads in your air duct is likely to reach your respiratory system. The air of the air duct is the air your family breaths in, and it is all over your living environment. Following are the contaminants that...