The Power of Perspective
Perspective is such a deceptively simple word, yet there is enormous power in the application of it. Put the other way… “If all you have is a hammer, everything looks lik...
Systems Help Center
Our comprehensive HVAC Systems Help Center covers a wide range of HVAC-related topics, including air conditioning and heat pumps, geothermal, hot-water heating, thermostats and controls, solar, steam heating, and warm air. We also have a section of informative and entertaining articles to help you sharpen your HVAC business skills. And our Heating Museum is a captivating journey through the evolution of HVAC technologies.
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Recent Articles
Pressure Reducing Valves in Steam Heating Systems
In this excerpt from his Dead Men’s Steam School seminar, Dan Holohan talks about working on steam heating systems that involve high pressure, such as district heating sy...
Thin-Tube and Column Radiators
Dan Holohan talks about the differences between thin-tube radiators and column radiators for heating systems. He also shares some troubleshooting tips and advice on air-v...
E.D.R. Explained
E.D.R. (Equivalent Direct Radiation) is the term that we use to measure modern radiators and older steam radiators. In this video, Dan Holohan tells us about E.D.R.
Radiator Controls
In this video excerpt from the Dead Men’s Steam School seminar, Dan Holohan shares his knowledge about radiator controls. He talks about thermostatic radiator valves, pne...
Water Quality in Steam Heating Systems
In this excerpt from his Dead Men’s Steam School seminar, Dan Holohan talks about water quality in steam heating systems. He gives tips on skimming and cleaning boilers, ...
Near-Boiler Piping in Steam Heating Systems
In this excerpt from his Dead Men’s Steam School seminar, Dan Holohan shares his knowledge about near-boiler piping in steam heating systems. Proper piping around the boi...
What’s The Right Heat Exchanger Pressure?
A few years ago, an engineer who works with older New York City buildings started to email me with good questions, mostly about steam heating. I’ve enjoyed hearing from h...
Radiators Overheating? Here’s How To Cut Radiator Heat Output
Many old steam-heating systems are oversized as a result of the Spanish Influenza pandemic of 1918-19. The flu killed 50 million people worldwide. People became deathly a...
A Circular Radiator
Circular radiators date back to the early 1900s. They were assembled as one whole radiator or as halves for the purpose of encircling columns. When they were in halves, e...