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NADCA professionals follow a higher standard of cleaning and must comply with the NADCA Code of Ethics

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NADCA Responds to White Paper

Statement from NADCA

Read NADCA's response to the controversial white paper, Effects of Negative Air Duct Cleaning on Flex Ducts


Who is NADCA?

NADCA is the global trade association representing the HVAC inspection, cleaning and restoration industry. We support members' success with standards, education, certification, marketing and advocacy to promote the highest quality and ethical services.

Avoid the Scams

NADCA doesn’t have access to consumer contact information and therefore doesn’t provide information to air duct cleaning companies. If you’ve received calls stating otherwise, they are false claims.



NADCA is recognized worldwide as the leading provider of certification, education, and training for HVAC inspection, cleaning and restoration professionals.


Whether you’re working to get a new technician up to speed or help a seasoned veteran prepare for the Air Systems Cleaning Specialist (ASCS) certification exam, we have the programs you need to get the job done right.

Duct cleaner working

Membership is Valuable

NADCA membership and certifications are nationally recognized, are often specified in commercial bids, and are increasingly requested by consumers. Join more than 1500 current member companies!