We receive many calls from customers asking if we clean ducts. First, it is important to understand all the known facts about duct cleaning in order to make the decision of Do or Don’t. One of the most important bits of information needed in this decision making process is what kind of duct system do you have. Is it all metal externally insulated, or is it one that has exposed metal boxes that are internally insulated with flexible ducts attached to them. Ninety to ninety five percent of the duct systems that we evaluate are the metal internally insulated with flexible ducts attached. After performing thousands of system replacements, we have seen the end results of many duct cleaning attempts. In many cases after a customer had paid hundreds if not thousands of dollars to have their duct systems “cleaned”, the results were poor and many times created more problems such as torn or damaged insulation and ruptured inner flexible duct linings.
What many of the “duct cleaning service providers” fail to communicate is not just a dust or dirt problem in a duct system, but most importantly, microbial growth. According to the Environmental Protection Agency (EPA) there has been no proof to date that duct cleaning prevents health problems. What has been proven is that some molds do cause allergic reactions, and in some cases more severe health conditions when spores get airborne and discharged into the living space. The dust in the duct systems provide the surface for the molds to grow if the right conditions are present…temperature, moisture, and a source for it to grow on. Once fiberglass insulation is contaminated with mold, cleaning is not sufficient to prevent re-growth and there is NO EPA-registered biocide for the treatment of porous duct materials. The EPA recommends replacement of wet or moldy fiberglass duct material. To learn more please visit; www.epa.gov/iaq/pubs/airduct.html.
If you are uncertain about the condition of your duct system, here are a few things that you can do to spot a “Red Flag.”
- Do you see any unusual growth or stains around your floor or ceiling registers or grilles?
- Do you see any dark spots or stains anywhere on your duct system?
- Do you see any moisture on your duct system, especially in the cooling season?
- Do you have a musty smell when your heating and cooling system runs?
If you answered yes to any of the questions above, you may have a problem that needs to be evaluated by a qualified HVAC company with proper Mold Inspection certifications. Blinson Service Company, Inc has the experience and credentials to determine the problem and provide a solution. Contact us today for an evaluation.