Windows
No more double windows! That was the title of an article I read in the Chicago Evening Post. The year was 1911 and the page was yellowed with age.
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.
Find help by category
Recent Articles
ARCO Cast Iron Radiators (1959)
This brochure from American Standard Hot Water and Steam Heat contains ARCO cast iron radiators literature and ratings from 1959.
Dopey Decisions
Here on the Isle of Long, if you throw a stick you’ll probably hit a Target store. I don’t have a problem with that because I really like Target stores. They usually have...
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...
Is The Safety Valve Actually Bad?
“Our safety valves keep popping. We’ve had a contractor replace them, but they keep going bad.” It was late on a Friday afternoon and the boiler operator was angry. “We n...
Which Came First: Steam or Hot-Water Heating?
Mr. Alfred G. King, it’s so good to hear your voice, even though you’ve been dead for quite some time. Thank you, sir.
G.M. Davis Air Valve Patent (1889)
On June 11, 1889, the G.M. Davis Regulator Company of Chicago, Illinois patented the Victor No. 2, an automatic air vent for steam radiators. It worked by the expansion o...
Clogston Steam Boiler and Radiator Patent
Here is a very old patent for T.S. Clogston's Cast Iron Sectional Steam Boiler and Radiator.
Ratings for Radiators with Corrugated, Ringed, and Plain Surfaces
This is an excerpt from Rolla Carpenter's "Heating & Ventilating Buildings" with a table about Experiments on Different Steam-Heated Surfaces and Different Materials (Wro...
Crank It Down?
In 1989, when we started our business The Lovely Marianne asked me what I was going to do to make money for her and our four daughters. I told her I was going to write bo...