September 13, 2004 at 8:31 am
#21097
Anonymous
If you mean the ducts in your home, the US EPA has a lengthy article about it at: http://www.epa.gov/iaq/pubs/airduct.html
It is quite balanced, yet they do say, “Duct cleaning has never been shown to actually prevent health problems … EPA does not recommend that air ducts be cleaned except on an as-needed basis because of the continuing uncertainty about the benefits of duct cleaning under most circumstances. “