Indoor Sciences, Inc. is a training and consulting firm with a mission to make buildings healthy. Indoor Sciences is located in downtown Chicago, but its clients stretch around the globe. The company was initially started in 2004 to spin off the training programs of Chelsea Group Ltd.  Indoor Sciences is owned by Ian Cull.


Bio: Ian Cull, PE, CIH

Ian Cull, PE, CIH is a well-known speaker and consultant on topics related to indoor air quality, mold and building science.  He is the author of 50 classes currently available in the Indoor Air Quality Association (IAQA) University.  He has served as the Technical Director, Vice-President and board member of IAQA.  He has 4,000 subscribers to his newsletter, “IAQ Website of the Month” and is the author of “Fundamentals of Mold Remediation.”


Mr. Cull has developed and taught numerous seminars, webinars, certification courses and customized presentations reaching thousands in the US and beyond. Mr. Cull has been the principal instructor for the following courses: CIE Prep Course, CMI Prep Course,  CIAQM Prep Course, Fundamentals of Indoor Air Quality and HVAC, and many others. His in-depth knowledge in all aspects of IAQ, HVAC, building science, sampling and remediation make him a highly respected and commended teacher.


Mr. Cull’s skill as an educator is based off his vast experience managing a large number of projects focusing on indoor air quality (IAQ).  Mr. Cull first started in the field of IAQ in 1995 when working with Chelsea Group Ltd.  He has assessed all building types ranging from large healthcare campuses to small apartment units.  He has consulted on projects covering a wide range of projects involving indoor air quality parameters such as mold, radon, asbestos, ventilation, filtration, building science, tobacco smoke, sewage, odors, VOCs, allergens and more.  To hire Ian Cull for a consulting project, please visit


Ian Cull has a Bachelor’s of Science degree in Engineering from one of the country’s top Environmental Engineering programs at University of Illinois, Champaign-Urbana. He is a Licensed Professional Engineer (P.E.) and a Certified Industrial Hygienist (CIH). He is also an Illinois licensed asbestos inspector and radon measurement professional.


Ian Cull is a member of the Indoor Air Quality Association (IAQA), American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), the American Industrial Hygiene Association (AIHA), ASTM International and the International Society of Indoor Air Quality and Climate (ISIAQ).


Ian Cull is committed to seeing the field of indoor air quality grow in the right direction. To that end, he has spent a great number of hours serving and volunteering on committees and boards:

  • Co-Chairman, IAQA Research Committee: 2016-present
  • ASHRAE IAQ Position Document Committee: 2015-present
  • AIHA-IAQA joint committee on IAQ Registry: 2012-2015
  • Technical Director, IAQA: 2011-2013
  • Vice President, IAQA: 2008-2011
  • Board of Directors, IAQA: 2006-2011
  • Board of Directors, IESO: 2007-2010
  • IAQA’s Education committee: 2005-2010
  • IAQA Nominating committee: 2007, 2008, 2010
  • Indoor Environment Connections Editorial Advisory Board, 2011-2013
  • Building Enclosure Technology and Environment Council (BETEC) Education Committee: 2011-2013



Mr. Cull lives in downtown Chicago with his wife and three children.