Air duct cleaning is recommended every 4-5 years for average homes.
Indoor air quality has become a concern in recent years due to respiratory related medical complications and improvements in research technology. Such a concern, the Environmental Protection Agency designated poor indoor air quality as the fourth largest threat in the United States.
Home heating, ventilation, and air conditioning (HVAC) systems are closed systems, meaning outside air is not circulated into the home. HVAC systems recycle the air in the home. Therefore, pollutants in the home, stay within the home.