Over time, impurities such as dust, pollen, debris and sometimes harmful pathogens such as mold, begin to accumulate on air duct surfaces. If the air has a high moisture content, fungi and bacteria may also begin to grow. Some of these particles can contain harmful pathogens, which when inhaled, can cause respiratory problems. Ridding the ducts of these pathogens on a regular basis is important as severe health problems can occur if these organisms are allowed to build up. |