In this excerpt from his Classic Hydronics seminar, Dan Holohan shares his knowledge about pumps in hot water heating systems. He talks about the history of circulators and how the Space Race affected their development, why circulators were installed on the return side, Gil Carlson, Pumping Away, cavitation, diagrams with circulator placement advice, the point of no pressure change, and more.

Want to learn more? Visit https://heatinghelp.com/. Want to be an expert? Get a copy of Dan Holohan’s book Classic Hydronics: https://www.amazon.com/Classic-Hydron...