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.
Dan Holohan discusses one of Mark Honeywell’s contributions to gravity hot water heating. He wanted to create even heat throughout the building, so in 1909 he solved the ...
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...
Here's a full day's work compressed into a couple of minutes, courtesy of our friend John Cataneo's Dropcam. There's a lot to consider when moving a hot-water system from...
It all started when a friend called to tell me about this old gravity hot-water system that had him baffled. “There’s no expansion tank anywhere on this job,” he said. “Y...
When servicing old hot-water heating systems that originally circulated by gravity, but now use circulating pumps, I began to notice a lot of oversized circulators. In so...
About eight blocks from my house in Baltimore, there is a large two-family house with an equally large hot-water heating system that originally circulated by gravity. The...
Sometimes, you just have to think like air. The house had been sitting on this old Connecticut street for more than 100 years. Children, grown and long gone, had once ski...
Q: How long has gravity hot water heating been around? A: Gravity hot-water heating began quietly in the United States between 1875 and 1885. It was a Canadian import, a ...