According to The National Heart, Lung and Blood Institute, more than 120,000 annual deaths in the United States are attributed to chronic obstructive pulmonary disease (COPD), a term used to describe a group of health conditions characterized by breathing difficulty. These include severe asthma, chronic bronchitis, and emphysema. Unfortunately, many people who have COPD do not even realize that they have it. COPD can be worsened by a number of invisible pollutants in the air inside a home, including mold spores, dust mites, chemical fumes, and pollen. The quality of your indoor air has a significant effect on your quality of life, particularly if you have COPD. If you’re concerned about your indoor air quality, a professional air duct cleaning by an HVAC company in Seattle is the perfect place to start.