Welcome to the International Association of Certified Indoor Air Consultants (IAC2).

IAC2… We care about your indoor environment: the air you breathe, the water you drink.

IAC2 is the non-profit, certifying body for home and building inspectors who have fulfilled certain educational requirements including those in the areas of indoor air quality and water testing.

Indoor air/water quality issues include Mold, Radon, Biologicals, Carbon Monoxide, Formaldehyde, Pesticides, Asbestos, Bacteria and Lead.

IAC2 Certified consultants have fulfilled the following minimum requirements:

  1. IAC2 Certified consultants are all members in good standing of the International Association of Certified Home Inspectors (InterNACHI) which is the largest inspection association in the world with strict membership requirements.
  2. IAC2 Certified consultants have all completed at least one additional IAC2-approved course.

Print off your IAC2 membership certificate.

To find an IAC2 Certified consultant in your neighborhood visit our members page.

July 2009: World Health Organization confirms that mold is a health hazard.

“How to Perform Mold Inspections” book.

“How to Perform Radon Inspections” book.

Take InterNACHI’s free, online Mold Inspection course.

Take InterNACHI’s free, online Radon Inspection course.  (NRPP &AARST approved)

Take InterNACHI’s free, online Moisture Intrusion course.

Get rack cards to promote your radon services.

Get rack cards to promote your mold testing services.

Take InterNACHI’s free, online Energy Audit course.

IAC2 promoted in Now that you’ve had a home inspection” book.

Free IAC2 inspection vehicle decals.

Free IAC2 sew-on emblems.

International Standards of Practice for Inspecting Commercial Properties.

IAC2 Standards of Practice for mold inspections.


Nationally renowned environmental lawyer Randall Weiner has accepted a position on IAC2’s Advisory Board.  Mr. Weiner has been practicing environmental law for over 20 years.  He has developed an expertise in air, water and land pollution, representing individuals and environmental groups.  He has obtained numerous court orders protecting people impacted by pollution, including a $12 million settlement from ASARCO, Incorporated on behalf of the residents of Globeville.  He was also the “Garbage Barge” attorney, obtaining three injunctions to halt the barge in New York, thereby highlighting the garbage crisis and the necessity for recycling in 1987.  We are very pleased to welcome Randall Weiner to IAC2’s Advisory Board.


According to PRO-LAB millions of homes across America have hidden water leaks that are promoting mold growth that can expose homeowners to mold spores. Mold has a potential to cause health problems like allergies, irritation (to lungs, eyes, skin, throat, nose) and are potentially toxic. Inhaling and touching mold spores may cause allergic reactions in sensitive individuals and normally healthy individuals may become sensitive to mold after exposure.

The EPA states that, “It is important to take precautions to limit your exposure to mold and mold spores. Avoid breathing in mold or mold spores”. The EPA also recommends that if you suspect you have a hidden mold problem you should consider hiring an experienced professional to avoid exposure to potentially massive doses of mold spores.

Mold damages what it grows on. The longer it grows the more damage it can cause. If there is a mold problem in your home, you should clean up the mold promptly. Mold can be hidden, growing on the water from a hidden leak, and can develop into a potentially large problem if not caught in time.

Testing your home on a regular basis is a prudent way to prevent small problems from growing into a costly and unhealthy situation, and always avoid exposing yourself and others to mold.

To find an IAC2 Certified inspector in your neighborhood visit our members page.


Contractors Association





While we strive to promote excellence and professionalism in the home inspection/indoor air consultation industries, the selection of an inspector is ultimately a decision for the customer, and we do not guaranty or warrant any inspection performed by those consultants listed on this website. Visitors to this website understand and agree that the International Association of Indoor Air Consultants (IAC2) is not liable for the alleged acts or omissions of any inspector it promotes, nor may IAC2 be held liable for damages allegedly sustained as a result of the acts or omissions of those consultants, regardless of the legal theories employed. Users of this site agree the exclusive venue for any litigation against IAC2 will be brought in the District Court for Boulder County, Colorado, or the U.S. District Court for the District of Colorado.