January 29, 2020 / J. David Miller

A New Edition of a Valued Resource on Mold

Last week, AIHA announced the publication of the second edition of Recognition, Evaluation, and Control of Indoor Mold, also known as the Green Book. This resource discusses the underlying principles of evaluating buildings for potential mold problems, interpreting data related to mold, and controlling mold hazards. As one of the editors of the Green Book, I would like to explain how the second edition differs from the first.

Approximately 80 percent of the material in the second edition is either new information or substantially different than the first edition. Text reused from the first edition was edited and the references updated; only references that are still available are included in the second edition.

Following are highlights of the new material in the second edition:

  • The health information is aligned with the epidemiological and medical information on environmental allergens and mold from the American Academy of Allergy, Asthma, and Immunology.
  • Since the first edition was published in 2008, there have been many changes in the taxonomy of the fungi. Many, if not most, of the fungi discussed in the first edition are now called by different names. The names have been updated in the second edition.
  • A great deal of work was done over the past 12 years to update guidelines on mold and dampness. In the second edition, the material on building inspections was aligned with current best practices. This material now incorporates medical and engineering perspectives through the use of new figures and new references.

The Green Book covers the underlying principles of building evaluation, data interpretation, and remediation and control of mold. Images of mold found in building exteriors and interiors are also provided. But the audience for the Green Book extends beyond the industrial hygiene and occupational health and safety professions. Physicians and their patients as well as engineers can benefit from the book’s guidance.

Allergists talk to their patients about “facilitating factors”—that is, the conditions necessary for the survival of allergen-producing contaminants. Some of the factors that favor cockroaches and house dust mites also favor mold and vice versa. Physicians have approaches to determine when a professional assessment for mold might be appropriate for patients suffering from allergies. The protocols outlined in the Green Book are aligned with advice on what a physician would expect in a report.

The protocols for mold and dampness investigations discussed in the Green Book require detailed investigation of a building’s heating, ventilation, and air-conditioning system. These protocols were developed by ASHRAE members who are also members of AIHA. Because of their influence, the Green Book includes terminology and a level of detail that will be familiar to practicing engineers, who will find it useful in cases where a mold issue requires upgrading the HVAC system.

For more information or to order a copy of Recognition, Evaluation, and Control of Indoor Mold, visit the AIHA Marketplace.

J. David Miller

J. David Miller, PhD, FAIHA, is a professor in the Department of Chemistry at Carleton University in Ottawa, Ont.


Thank you so much for talking about this book and how it discussed the protocols for mold and dampness. I realize that I have some mold in the apartment I just moved into. I will find a mold removal service in my area. https://www.rainbow-environmental.com/mold

By Ella Starr on May 14, 2021 2:21pm
Claire Bird - President Indoor Air Quality Association Australia

Thanks go to Prof. David Miller and all collaborators for updating this most vauable reource to help us in the battle against mo(u)ld and its impact on heatlh. We are curently working through it as a Technical Group dealing with mould in Australia. As the IAQA in Australia develops its understanding and knowledge sharing for its members, I am sure this will become a critical go-to reference point for them. It provides a great basis for the body of knowledge that Indoor Air Quality Professionals need when assessing potential mo(u)ld contaminated envionments and ensuring safe occupancy. We will also ensure that the HVAC bodies here are familiar with its contents and get their feedback.

By Claire Bird on February 28, 2020 10:22pm
Great work

Looking forward to getting an updated copy.

By Penny on February 17, 2020 4:03am

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