Carl Grimes, HHS CIEC, has consulted with people who have questions or issues with the indoor environment since 1987 as President of Healthy Habitats LLC in Denver, CO. The methods he has developed are based on the dynamic integration of his personal health and consulting experience plus participation in activities with IAQA, ISIAQ, AAAAI, ACAAI, ISEE, ASTM, ASHRAE, SLOAN Microbiome, NADCA, ACCA, ACAC, ASHI, MIAQC, NCHH, IICRC, ANSI, RIA. Carl is a frequent presenter nationally and internationally, past President of IAQA, and past Vice President of Practice of ISIAQ. He has served on and chaired committees writing ANSI accredited standards chaired the IAQA Healthy Home Committee which wrote the Healthy Home Assessment Principles course with NCHH and Children’s Mercy Hospital in Kansas City. He was a Committee member on the ACAAI-AAAAI Joint Task Force Committee that wrote medical practice parameters and also on the committee that wrote the ASHRAE Mold Position Statement and the Dampness Definition Committee. He is the current Managing Director of the Hayward Healthy Home Institute in Carmel, CA, and the Hayward Score Director of Healthy Homes.