There are three good reasons to clean the ducts in your
home. First of all, duct cleaning will improve your indoor air quality. Dust
contains pollutants, viruses, and micro - organisms that can stimulate allergies
and aggravate respiratory conditions. The air ducts in your home retain moisture
and therefore provide a breeding ground for mites, mold and fungi. After the
ducts are cleaned you will have less dust in your home and less house cleaning
which will leave you with more time to do the things you want. Dust and dirt can
block air flow. By cleaning the ducts properly you can increase the efficiency
of your heating and cooling system and save on your energy bill.
Also, take a look at the following picture: