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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Archive for April, 2023

analog guy
Do You Miss the T87?

In 1885, when you could still buy a milk cow for $29.70, Albert Butz, a Swiss immigrant living in St. Paul, Minnesota, invented what he called the damper-flapper. He pate...

Published on 04/27/2023 2:09 PM by Dan Holohan
Posted in The HVAC Business
big idea
What Did You Think Wouldn't Make It?

When we started in 1997, the folks who built that first crude site told me we could have a links page. I asked what that was, and the young man doing the ...

Published on 04/27/2023 2:07 PM by Dan Holohan
Posted in The HVAC Business