In addition to dust, air ducts often contain harmful contaminants and micro-organisms such as pet dander, bacteria, pollen, mildew and mold spores. People with respiratory problems are particularly sensitive to these airborne particles, and a periodic air duct cleaning promotes healthier living. Your package is for a $100 that includes cleaning of: 1) Unlimited Air Ducts 2) Unlimited Air Ventilation 3) Natural disinfectant sanitizer will be sprayed into the main line of your duct system during the cleaning. Sanitizer can be used around children, pets and food. 4) Free Inspection/check up of your Furnace, mainlines, dryer and Ac will be provided if it needs cleaning the technicians will be quoting you the price on the spot.