According to the EPA, if you have a ducted heating and cooling system, the ducts should be cleaned every three to five years.

Why Air Duct Cleaning?

•    The EPA ranks indoor air pollution among the top five health risks.
•    97% of homes have indoor air quality issues.*
•    Dirty coils and ducts use as much as 30% more energy than clean ones.**

*Air Advice, State of Our Indoor Air Report, 2007.
**McKinsey Quarterly.