Honeywell's Heat Generator
In this excerpt from his Classic Hydronics seminar, Dan Holohan teaches us about Mark Honeywell’s Heat Generator. In the early days of hot water heating, Mark Honeywell i...
Hot-Water Heating 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.
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Recent Articles in Hot-Water Heating
How Gravity Hot-Water Heating Systems Work
In this video, Dan Holohan teaches us about gravity hot-water heating systems. Classic gravity heating is both the simplest and the most complicated system of all. It’s s...
The First Hot-Water Heating System
Jean Simon Bonnemain created the very first hot-water heating system in Paris in 1777 to heat chickens. In this video, Dan Holohan shares how this system worked and h...
Steam-to-Water Heat Exchangers
Many buildings, particularly modern buildings, work with both steam and hot-water heating systems. In this excerpt from his Dead Men’s Steam School seminar, Dan Holohan g...
Indirect Heating Systems
In this video, Dan Holohan tells us about indirect heating. It is a method of heating that the old-timers used to warm fresh air before it entered a building. They placed...
Eureka: An Early Diverter Tee
In 1897, Eureka made an early version of what we now call the diverter tee. It worked by creating a drop in pressure along its run, which encouraged the water to flow int...
Radiator Covers
Should you box in those radiators? Let’s take a look at radiator enclosures. Some people use them because they think old radiators are ugly (I sure don’t).
A Circulator Is Not A Pump
A bicycle pump is a pump. So is an oil pump on an oil burner. When those machines start, you expect to get a pressure on the outlet side of the pump that’s greater than t...
Superior Ways to Keep Your Clients in Hot Water
For many experienced plumbers, there really isn't much to replacing a water heater. It's an easy job: just pick up one that matches what's there, maybe strap it in, and l...
Metal Paints and Radiators
Ever wonder why the Dead Men painted so many of those old, free-standing, steam- and hot-water radiators silver? Yeah, so did I. I did some digging and came up with a del...