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

Broomell Specifications (1924)

This document from October 6, 1924, outlines specifications for the Broomell System of heating. Thanks to Brian Reynolds who bought this rare document on eBay from the gr...

Published on 06/16/2014 6:19 PM
Posted in Heating Museum
Broomell System Notes

Here are some notes about the Broomell System of Vapor Heating. Thanks to Patrick Linhardt for scanning and sharing this.

Published on 06/16/2014 6:13 PM
Posted in Heating Museum
Broomell Heating System Patents

Here are patents from the early 1900s for the Broomell heating system. Thanks to Gerry Gill for finding and sharing these patents. It's a wonderful walk through heating h...

Published on 06/16/2014 6:11 PM
Posted in Heating Museum
Trap Bushing for Radiators (1919)

Here is a patent for a trap bushing for radiators from F.J. Vaux in January 3, 1922. This one could easily stump you if you didn't know it was in there.

Published on 06/16/2014 6:10 PM
Posted in Heating Museum