When you breathe a sigh of relief after giving your home its annual thorough cleaning, you may be breathing in more dust, dirt, and pollution than you realize—unless you’ve also gotten the air ducts cleaned. Through normal living, people generate a great deal of contaminants. These get pulled into the H-V-A-C system and re-circulated. Over time, dirt builds up in the ductwork. Allergy and asthma sufferers, children, and the elderly tend to be more susceptible to this. Also, some homes with pets, smokers, or remodeling projects are more likely to have dirty ducts. Fortunately, it’s easy to deal with. Simply have your H-V-A-C system cleaned regularly by a reputable, certified professional. The ones who are NADCA members possess general liability insurance, are trained and tested regularly, sign on to a code of ethics, and clean and restore your heating and cooling system in accordance with NADCA standards. For more on healthy air in a healthy home, visit Breathing-Clean--dot--com. To find a nearby NADCA member, go to n-a-d-c-a--dot--com.