Carl’s work focuses on people who feel better outside of their house or office, helping building occupants understand and improve their indoor environments — particularly for people experiencing health symptoms tied to indoor exposures like mold, volatile organic compounds (VOCs), and fragrances. Because he originally experienced indoor environmental harm in his personal life, he brings a unique perspective to understanding and communicating the complications between clients and practitioners. Carl is a frequent presenter nationally and internationally, past President of IAQA (Indoor Air Quality Association), and past Vice President of Practice of ISIAQ. He has served on and chaired committees writing ANSI accredited standards like the original IICRC-S520, chaired the IAQA Healthy Home Committee, and was a committee member on the ACAAI-AAAAI Joint Task Force that wrote medical practice parameters. He is immediate past chair of the ASHRAE TC1.12 Moisture Management in Buildings, and Guideline 10, Interaction Affecting the Achievement of Acceptable Indoor Environments, plus the ASHRAE position document Health and Wellness in the Built Environment.