Articles by John Siegenthaler, P.E.

Parsing a number

Differences exist between rules of thumb and precise calculations.
By John Siegenthaler, P.E.
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Differences exist between rules of thumb and precise calculations.


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Nature vs. math

Formulas and assumptions don’t always predict what happens.
By John Siegenthaler, P.E.
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 The following formula has been around the North American hydronics industry for a long time:  


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Trade-offs in boilers

Two boiler characteristics that need to make a comeback.
By John Siegenthaler, P.E.
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 North American hydronic professionals can now choose from dozens of modulating/condensing (mod/con) boilers. Many are designed for wall-mounting. Those who design these boilers strive for small enclosures and low weight.  


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The basics of radiant ceiling cooling

No drips allowed.
By John Siegenthaler, P.E.
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 For decades, well-designed and -installed hydronic heating systems have earned a reputation for superior comfort. Still, potential customers who understand and desire the benefits of hydronic heating often ask, “But how does this system provide cooling?”  


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Biomass heating systems can use both big and little tanks

How they can work together in a wood-fired heating system.
By John Siegenthaler, P.E.
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Interest in biomass heating systems continues to rise, especially in rural areas of the United States and Canada. Although plenty of devices are available that burn wood to heat water, the state-of-the-art device is a wood-gasification boiler.


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Solar Thermal Report- Spring 2013: If I Made the Tanks, Part 1

What would an ideal pressurized thermal storage tank for a solar combisystem look like?
By John Siegenthaler, P.E.
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Residential solar combisystems provide domestic water heating and some percentage of space heating. Although less known than domestic hot water-only systems, combisystems can be practical and efficient if properly sized and designed.
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Smoke Gets in your Eyes

It’s time to do wood-fired heating right.
By John Siegenthaler, P.E.
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Every August, I make a short trip to a local event call the Woodsmen’s Field Days. This gathering is all about cutting down trees and then slicing them up into either firewood or lumber.
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Energy and Power

They're not the same thing
By John Siegenthaler, P.E.
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Most of you reading this column consider yourselves heating professionals.
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Heat pumps are renewable energy heat sources

By John Siegenthaler, P.E.
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I recently read an Internet posting asserting that heat pumps, both air-source and geothermal, should not be considered renewable energy heat sources.


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Do this, do that

By John Siegenthaler, P.E.
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A new piping concept and control wiring challenge.  
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With proper design, you can create systems that require supply water temperatures no higher than 120° F under design load conditions.

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July 2014

2014 July

In the July issue of PM Magazine, read about the steps the president of MacGregor Plumbing is taking to help the next generation of plumbing professionals enter the industry. Learn about the Hartford Loop, how CPVC pastic piping works in multifamily construction and training mistakes to avoid to become a more effective trainer. Find out who is this month's Truck of the Month, read the latest tool tips and discover the latest products in the plumbing industry.
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