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

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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.

Published on 08/12/2019 1:40 PM
Posted in Heating Museum
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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...

Published on 07/30/2019 6:49 PM by Dan Holohan
Posted in The HVAC Business
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...

Published on 07/29/2019 11:44 AM by Dan Holohan
Posted in Hot-Water Heating
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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...

Published on 06/13/2019 7:10 PM
Posted in Steam Heating
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...

Published on 06/05/2019 4:16 PM
Posted in Heating Museum