Commercial Air Duct Cleaning is more important than you think. The air we breath is very important to the way we work. A dirty air system will build up gradually created bad air quality. The American Lung Association claims that poor indoor air quality is a major reason for the loss of days at work and in school. According to the Environmental Protection Agency (EPA), the dirt that builds up on heating or cooling coils results in a decrease in HVAC system effeciency by 21%. Air Duct cleaning is not just a concern for those who work in older buildings. New buildings can have air quality problems as well. The dirt and debris that can be found in ducts and hidden areas, is passed back and forth until it builds up, hindering system performance as well as providing health hazards to those who work within the building.