EAST PETERSBURG, Pa. — The National Association of Oil and Energy Service Professionals (OESP) is sponsoring Dan Holohan’s Classic Hydronics seminar on Tuesday, Sept. 10, 2013 at the Holiday Inn in Timonium, Md. The seminar will start at 5 p.m. with a buffet dinner. Holohan will speak from 5:30 p.m. to 8:45 p.m.

“This all-technical seminar will give you a liberal arts education in classic hydronic systems,” said Holohan. “You will see inside the pipes and get a better understanding of how things work, what goes wrong, and why. I’ll share with you the secrets I’ve picked up from the old timers, making you a better troubleshooter.”

The seminar explores one-pipe loops, the critical importance of pressure differential, gravity hot-water heating, pumping, radiation, one- and two-pipe primary-secondary systems, two-pipe direct and reverse return, classic radiant, multiple boiler systems, diverter tees, two-temperature systems, air problems and their solutions, and more.