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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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Archive for June, 2019

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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