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There is substantial visible mold growth inside hard surface (e.g., sheet metal) ducts or on other components of your heating and cooling system. You should consider having the air ducts in your home cleaned if: 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.

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. 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. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. Environmental Protection Agency (EPA) urges you to read this document in it entirety as it provides important information on the subject.ĭuct cleaning has never been shown to actually prevent health problems. Knowledge about air duct cleaning is in its early stages, so a blanket recommendation cannot be offered as to whether you should have your air ducts in your home cleaned. Do sealants prevent the release of dust and dirt particles into the air?.Should chemical biocides be applied to the inside of air ducts?.Are duct materials other than bare sheet metal ducts more likely to be contaminated with mold and other biological contaminants?.Does duct cleaning prevent health problems?.To Prevent Dirt from Entering the System.How to Determine if the Duct Cleaner Did a Thorough Job.What to Expect of an Air Duct Cleaning Service Provider.Suggestions for Choosing a Duct Cleaning Service Provider.Deciding Whether or Not to Have Your Air Ducts Cleaned.Should You Have the Air Ducts in Your Home Clenaed?