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Dan Holohan to Present Classic HydronicsSubscribe to RSS feed

OESP, the National Association of Oil and Energy Service Professionals, is sponsoring Dan Holohan’s Classic Hydronics seminar on Tuesday, September 10 at the Holiday Inn in Timonium, MD.

The seminar will start at 5 pm with a buffet dinner. Holohan will begin speaking at 5:30 pm and he’ll finish up at 8:45 pm.

“This all-technical seminar will give you a Liberal Arts education in Classic Hydronic systems,” says 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.”

This class 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.

Seating is limited and this class sells out quickly. Visit to purchase your ticket or call 888-552-0900. Tickets are $129.00 per person.