Jerald D. Parker is a professor emeritus of mechanical engineering at Oklahoma Christian University after serving 33 years on the mechanical engineering faculty at Oklahoma State University.   During his tenure at Oklahoma State, he spent one year on leave with the engineering department of Du Pont in Newark, Delaware. He has been active at both the local and national level in ASME, where he is a fellow. In ASHRAE he has served as chairman of the Technical Committee on Fluid Mechanics and Heat Transfer, chairman of a standards project committee, and a member of the Continuing Education Committee. He is a registered professional engineer

Jeffrey D. Spitler is a professor of mechanical and aerospace engineering at Oklahoma State University, Stillwater.. He is an active member of ASHRAE and has served on several technical committees, a standards committee, and the Student Activities Committee. He also serves on the board of directors of the International Building Performance Simulation Association. He is a registered professional engineer and has consulted on a number of different projects.