Classic Hydronics Seminar
In this all-technical three-hour seminar, Dan Holohan will give you a Liberal Arts education in those Classic Hydronics systems. He’ll have you seeing inside the pipes as...
Hot-Water Heating → Primary-Secondary Pumping Help Topics
This section is your guide to hot-water heating systems with information about system design and piping, air elimination, pumping away, primary-secondary pumping, valves, radiators, troubleshooting tips, and more.
Recent Articles in Hot-Water Heating → Primary-Secondary Pumping
Primary-Secondary Pumping on Two-Pipe Hot Water Heating Systems
In this excerpt from his Classic Hydronics seminar, Dan Holohan talks about primary-secondary pumping on two-pipe hot water heating systems. Want to learn more? Read Dan ...
Primary-Secondary Pumping on a One-Pipe Hot Water Heating System
In this excerpt from his Classic Hydronics seminar, Dan Holohan explains how primary-secondary pumping works in a one-pipe hot water heating system. Dan talks about valve...
Primary-Secondary Pumping with Multiple Boilers
Dan Holohan shares his knowledge about primary-secondary pumping with multiple boilers on hot-water heating systems. Want to learn more? Read Dan Holohan’s book Classic H...
Why Closely Spaced Tees?
Primary-secondary piping systems call for the tees that go off to the secondary circuit to be close together, ideally not more than six inches apart. Think like water and...
Understanding Primary-Secondary Pumping
Primary-secondary pumping has become pretty popular nowadays, especially with boiler manufacturers. They love it because it offers a simple way to protect their boilers a...
Primary-Secondary Systems Sometimes Overheat
The guy had told his architect to have a corner of his basement dug out so that he could play half-court basketball with his two kids. The ceiling was 14 feet above the p...