The American Industrial Hygiene Association (AIHA), in partnership with the Indoor Air Quality Association, has released the updated Indoor Air Quality Practitioners Body of Knowledge (IAQ Practitioners BoK).

The BoK outlines the competencies needed in the area of indoor air quality practice. For the past 12 months a task force of highly qualified subject matter experts from AIHA and IAQA collaborated to review this document.

The 2019 BoK contains the following updates:

  • Assessments, such as data gathering, limitations and walkthrough inspection
  • Buildings and building systems, including building science and Heating, ventilation, and air conditioning (HVAC)
  • Mitigation of indoor air/environmental quality problems

"This update of the IAQ Practitioners BoK takes into account the changes in the IAQ field that have taken place since the original BoK was issued," said Donald Weekes, CIH, AIHA Fellow and member of the task force. "The BoK will serve as the best criteria to measure competencies of the practitioners in the IAQ field."

IAQA President Jay M. Stake said the update “represents the power of a strong collaboration between industry partner associations.”

To download the IAQ Practitioners BoK, visit AIHA's website.

The IAQA is the leading organization dedicated to developing, educating and supporting its multidisciplinary membership to identify and resolve indoor environmental challenges. More information is available ale at