John Siegenthaler, PE

John Siegenthaler, PE

John Siegenthaler, P.E.
Principal of Appropriate Designs
john@hydronicpros.com

The third edition of his book, Modern Hydronic Heating,
is now available. For details, visit www.hydronicpros.com.
 

ARTICLES

Don’t Overlook the Trees

Modern Approaches to Wood-fired Hydronic Heating

Long before Americans had access to natural gas, propane, fuel oil, or electricity, and long before there were automatically controlled central heating systems, wood was the most commonly used heating fuel.


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Hydronic Radiant Ceiling Cooling for Smaller Buildings

Though More Expensive, Radiant Trumps Forced Air in Comfort

The combined cost of hydronic radiant panel heating, along with a separate central cooling system, often strains the construction budget to a point where something has to go, and that something is usually the radiant heating option. It gets trumped by a lower-cost forced-air system that delivers both heating and cooling, albeit often at reduced comfort.


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My First Online Teaching Experience

I Often Find Myself Talking to My Computer

Last fall, I taught my first online course dealing with designing hydronic heating systems. The course was titled “Mastering Hydronic System Design.” It was a collaborative effort between HeatSpring Learning Institute, BNP Media’s CE Campus, and myself.


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Heat Transfer: Nature Versus Math

Formulas and Assumptions Don’t Always Predict what Happens

The following formula has been around the North American hydronics industry for a long time: Btuh = 500 x gpm x delta T. It can be used to estimate the rate of heat transfer into or out of a device that has a stream of water flowing through it at a known flow rate, and with a measured temperature change between the inlet and outlet of that water stream.


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Avoiding Thermal Depression

A New Way to Protect a Heating System

A cool concrete slab is like a black hole for Btus. It gobbles up any heat that dares to get close. The solution is to install a mixing assembly operated by a controller that measures the boiler’s inlet temperature, as well as the water temperature supplied to the distribution system.


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Multimedia

Videos

Image Galleries

2015 AHR Expo

Photos from the 2015 AHR Expo at McCormick Place in Chicago.

Posted: February 19, 2015

Podcasts

NEWSMakers: Andy Patron
Andy Patron, partner with FMI Corp., discusses the impact a national labor shortage may have on the mechanical contracting industry. Posted on March 27.
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