You or your family members have allergies?
Dust and other contaminates are actually pulled into your furnace system through the return air side of the system. Heating air ducts systems provide ideal breeding grounds for bacteria, mold, fungi, and other allergens. As an example: dust mites breed in temperatures between 72 and 86 degrees.
Children under four (with immature immune systems) are particularly under attack and the result may be allergies or asthma. Seattle Healthy Projects reports. “New research indicates if children do not come into contact with Asthma triggers between birth and 4 years old they may never develop asthma.