Indoor air quality has grown to be more important than previously, especially as people spend most of their time inside homes or workplaces. A key component that influences indoor air quality will be the cleanliness in the air ducts—the hidden network that circulates heated or cooled air throughout a building. https://graph.org/Air-Duct-Cleaning-Benefits-Process-Costs-and-When-You-Really-Need-It-11-29-2