John Siegenthaler, P.E., is a mechanical engineering graduate of Rensselaer Polytechnic Institute, a licensed professional engineer, and Professor Emeritus of Engineering Technology at Mohawk Valley Community College. "Siggy", as he is known in the industry, has over 32 of experience in designing modern hydronic heating systems, including those using renewable energy subsystems. He is a hall-of-fame member of the Radiant Panel Association, and a presenter at national and international conferences on heating and building technology. John is principal of Appropriate Designs, a consulting engineering firm in Holland Patent, NY.