Cleaning air ducts is not a do-it-yourself job. Even if you were inclined to do it, chances are good that you wouldn't own the right tools, such as special rotary brushes and a high-powered vacuum. You'll need to hire professionals.

If your family is getting sick more than normal, experiencing coughing, sneezing, sore throats, runny noses, nasal congestion, headaches, and low-grade fevers, they may have upper respiratory infections as a result of dirty air ducts.

Ductwork inspection includes identifying cracks and leaks, as well as areas inside the ducts where debris and dust have built up. Air duct cleaners then attach the vacuum system to the ductwork to collect the debris as it is loosened and removed by the cleaning process.

As a rule of thumb, the National Air Duct Cleaners Association (NADCA) suggests cleaning your ducts every three to five years.

How long does an average ductwork cleaning session take? The typical single-family home's air duct system takes between two to four hours to clean with a crew consisting of at least two technicians. Older homes and those with pets may take longer to clean.

Dirty air ducts causes the “sick building syndrome” - When the air ducts are not cleaned, pet dander, dust, pollen, and other allergens get stuck in the ducts. ... Apart from causing serious health problems, this contaminated air also speeds up the aging process.