The International Association of Certified Indoor Air Consultants (IAC2) is the certifying body for residential and commercial indoor air consultants in North America. IAC2 is a non-profit membership trade organization headquartered in Boulder, Colorado.

The organization’s membership base is multi-disciplinary and consists of certified professionals specializing in mold, radon, lead, asbestos, carbon monoxide, formaldehyde, pesticides, biologicals, bacteria, indoor particulate matter, allergens, and other sources of indoor air pollution. Certification is available to all qualifying members who have demonstrated the highest competency to identify and solve indoor air pollution problems and protect their client’s health and safety.

IAC2 Certified consultants are listed in an IAC2 Certified Consultants Directory for use by the general public, in addition to residential and commercial real estate professionals. Those seeking mold inspection and testing, radon testing and mitigation, asbestos inspection and abatement, lead paint and water testing, and other environmental services should visit the directory to find a certified consultant.

IAC2 has numerous resources available to members for professional development, including business and legal documents, marketing materials, and educational materials. IAC2 also strives to support IAQ educators, training providers, industry vendors, and the general public, while fostering connections between industry professionals who are knowledgeable about the developments, advancements, and initiatives in indoor air quality.

IAC2 is a private trade group, not a government agency. Contact your local regulators to ascertain what the requirements are in your area before performing any inspection or testing. Attaining the IAC2 professional designations does not ensure that you comply with the government rules and licensing requirements of the jurisdiction where you conduct business. The IAC2 professional designations signify your dedication to education and expertise in identifying and solving indoor air quality problems in homes.

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Our vision is to secure a safe and healthy indoor environment for everybody.


Our mission is to certify indoor air quality specialists who demonstrate proficiency in reducing indoor air pollution by improving overall indoor air quality, and providing the general public and real estate professionals with a reliable means of finding certified consultants who can address problems related to indoor air pollution.

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