About the Instructors:

siegenthalerJohn Siegenthaler
Appropriate Designs

John Siegenthaler is Principal of Appropriate Designs, a consulting engineering firm in Holland Patent, N.Y. He is a mechanical engineering graduate of Rensellaer Polytechnic Institute and a licensed professional engineer. He has over 25 years of experience in designing modern hydronic heating systems. John is also an Associate Professor of engineering technology at Mohawk Valley Community College in Utica, NY. He is the author of the text Modern Hydronic Heating, and numerous other publications dealing with hydronic heating. John is also a contributing editor for PM, and its monthly "The Glitch & The Fix" column, which offers hydronic troubleshooting solutions in conjunction with the magazine's twice-monthly Radiant & Hydronics e-Newsletter.
dan_headshot_for_webDan Holohan
HeatingHelp.com

Dan Holohan began his love affair with heating systems in 1970 by going to work for a New York-based manufacturers representative that was deeply involved in the steam- and hot-water heating business.  He studied hard, prowled many basements and attics with seasoned old-timers, and paid close attention to what they had to say.

Today, Dan operates the popular website, HeatingHelp.com.  He has written hundreds of columns for many trade magazines, as well as 16 books on subjects ranging from steam- and hot-water heating, to teaching technicians.  His degree is in Sociology, which Dan believes is the perfect preparation for a career in the heating industry.