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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 2015

snarlpuppy
Is That Cheating?

I've learned that there are many imaginative contractors in the heating business, and many have a fine way with words, along with unusual ways of sizing equipment, explai...

Published on 10/14/2015 4:33 PM by Dan Holohan
Posted in The HVAC Business
complex math
What Many Contractors Have in Common

I've been thinking about the tens of thousands of contractors I've met in my travels since 1970. I love these people (some more than others) and their tenacity. There's n...

Published on 10/05/2015 10:01 AM by Dan Holohan
Posted in The HVAC Business
Steam Water Hammer
A Heated Exchange

For want of a vacuum breaker, water hammer destroyed this heat exchanger. The call came in when I was young, eager, and paying close attention to the grown-ups. I had bee...

Published on 08/23/2015 4:23 PM
Posted in Hot-Water Heating
Gerry Gill Main Vents 01
Why Steam Boilers Short-Cycle

I figure there are only two things that can start and stop a steam-heating boiler. One is a thermostat of some kind. It might be an ordinary one, the sort you’d find in a...

Published on 08/23/2015 4:12 PM by Dan Holohan
Posted in Steam Heating
Why Did The Boiler Fail So Quickly?

For a sales transaction to be successful, there has to be certain expectations for both the buyer and the seller. That same type of arrangement holds true when a building...

Published on 08/13/2015 12:05 PM by Ray Wohlfarth
Posted in Steam Heating
Boilers Outside the Box

When I was young, I used to love watching magicians and was amazed how they would pull something out of what appeared to be an empty hat. That seems to be the kind of cli...

Published on 08/13/2015 12:01 PM by Ray Wohlfarth
Posted in Steam Heating
Connecting New Boilers to Old Pipes

Designing a commercial boiler replacement where you were not the original designer or installer might have some hidden dangers that could haunt you for years. The project...

Published on 08/13/2015 11:51 AM by Ray Wohlfarth
Posted in Steam Heating
Why Boilers Are Still Great

The appointment with the specifying engineer did not go well, at all. I proudly showed him the information about the boilers that I represent and he handed the material b...

Published on 08/13/2015 11:48 AM by Ray Wohlfarth
Posted in Steam Heating