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Should Homeowners and Businesses Be Concerned About Dirty Air Ducts?

While no one can say with complete certainty that clean air ducts promote better indoor air quality, there’s little doubt that dirty ones collect contaminants like dust, pet dander, and chemicals. A six-room home can collect as much as 40 pounds of this each year, according to the HVAC Inspection, Maintenance, and Restoration Association (also known as NADCA).
Professionals who have been specially trained to use Rotobrush equipment can remove these contaminants altogether.   The US Environmental Protection Agency says homeowners should consider cleaning air ducts when:

  • There is visual evidence of mold growing inside ducts or on other HVAC components.
  • Mold can only be positively identified by an expert; final confirmation may require a laboratory test.
  • Ducts are infested with vermin such as rodents or insects.
  • Ducts are excessively clogged with dust, debris, or particles and are getting released into the home through the supply registers.


NADCA notes that contaminant buildup can also block airflow and force HVAC systems to work harder and for longer periods of time. This can increase energy bills and wear and tear on the systems themselves.

Educate Customers About the Benefits of Clean Air Ducts
Most customers, particularly those who own the buildings they live or work in, are pretty smart about maintaining them and are eager to learn more. When you speak to a customer on the phone, tell them to look inside their registers when they change their air filters. For many, that will be enough for them to make a decision to request duct cleaning or consider it in the future.


According to Angie’s List, many people who have had their air ducts cleaned report fewer allergies, and less dust in the home. Some even comment that their homes smell nicer after a cleaning. Even the NADCA Executive Director says that the only difference between his organization’s and the EPA’s recommendations are how often air ducts should be cleaned.


Small wonder that the HVAC industry has welcomed air duct cleaning as a value-add for themselves and their customers. Other industries, including carpet cleaning and janitorial businesses, have shown interest in improving indoor air quality for their customers. If you own one of these types of businesses, learn more about how you can expand your services into boosting clean indoor air.