Should You Have the Air Ducts Cleaned?

Many tenants and home owners ask about air duct cleaning and don't realize that often times it is not necessary for a healthy environment.
Here is a short summary from a link published by the EPA in regard to Air Duct Cleanings:

Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space. It is important to keep in mind that dirty air ducts are only one of many possible sources of particles that are present in homes. Pollutants that enter the home both from outdoors and indoor activities such as cooking, cleaning, smoking, or just moving around can cause greater exposure to contaminants than dirty air ducts. Moreover, there is no evidence that a light amount of household dust or other particulate matter in air ducts poses any risk to your health.

For the entire article visit this link:

http://www.epa.gov/iaq/pubs/airduct.html