$ 0 0 Levels of about a dozen common organic pollutants are 2 - 5 times higher indoors than outdoorsReturn vents hold dust and dirt in your duct system and must be cleaned oftenUsing 100% natural productsTruck-mounted machinery cleans 98% of the dirt in your duct systemDuct cleaning helps to reduce dust inside the house and is beneficial for allergy sufferersHelp reduce your heating and cooling bills with a duct cleaning