The National Air Duct Cleaner's Association (NADCA) has granted final approval to the most comprehensive set of air duct cleaning standards crafted in the U.S. The standards are expected to be released as early as late-July or early-August.
The standard has been developed over the past two years by a NADCA committee. It will recommends a that hvac systems be cleaned based on a regularly scheduled basis and provide details about how clean the systems should be.