Why is sealing the ductwork important?
For an average home, leaky ductwork often accounts for 10 to 30 percent (in extreme cases much more) of total heating and cooling costs. This is one reason for hundreds of dollars that are wastedon your utility bill each year. While the increase in energy cost is significant,protecting health and safety is the most important reason to seal ducts. Ducts are usually located in the attic, crawl space or basement. If the return ducts leak, they draw air from these areas directly into the home. This air can be contaminated with dust, mold, mildew, excess humidity, and potential toxins such as pesticides for termite treatment, combustion gases, and radon. On the other side when the supply ducts leak, they can create a lower pressure inside the house which draws in contaminates, also.
