The furnace and air ducts act as your home's 'respiratory system'. Your system "inhales" throught the return system and "exhales" through the supply side. Your system can become 'congested' when filled with contaminants and debris. Clean and open, the system can breathe and function properly. Allergy sufferers can benefit greatly by reducing the amount of 'triggers' that are present in ductwork. The proper cleaning of the air duct system is a necessity. Additionally, sanitizing and deodorizing, in certain circumstances, is key. Health benefits are evidenced by a statement by Dayton Ear, Nose, and Throat Surgeons, Inc., John H. Boyles, Jr., M.D., Arthur Gardikes, M.D.: "Air duct cleaning for respiratory allergies is a valuable process that is essential to live in an environment that is clean and allergy free."
A home or office is only as clean as its heating and cooling ductwork. The air in your home/office is circulated through the ductwork, the dirtiest, most unsanitary part of any building. With people spending as much as 90% of each day indoors, air quality is a major concern.
Many allergy triggers are present in air ducts. In fact, indoor air can be up to 70% more polluted than outdoor air. Advantages of clean ductwork to homes and businesses can be substantial. The NEMI (National Energy Management Institute) reports that, "Benefits of improved indoor air quality are so large that this opportunity cannot be ignored…"