Dan Koenigshofer was raised in Los Angeles, where as a child, he suffered from asthma, allergies, and loss of outdoor play time exacerbated by smog. He received a bachelor’s degree in physics with a minor in meteorology from the University of California at Davis and a master’s degree in public health, air and industrial hygiene, from the University of North Carolina at Chapel Hill. His first job was at an air pollution testing and engineering firm. In 1990, he began specializing in hospital engineering and has written numerous articles and a book on hospital HVAC design. He serves on the ASHRAE Standard 170 committee and is a senior member of the ASHE.