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Articles by John Siegenthaler, P.E.

The basics of radiant ceiling cooling

No drips allowed.
June 25, 2013

 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.
May 29, 2013


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?
April 26, 2013
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.
April 19, 2013
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
February 13, 2013
Most of you reading this column consider yourselves heating professionals.
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Heat pumps are renewable energy heat sources

January 15, 2013
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

December 1, 2012
A new piping concept and control wiring challenge.  
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Avoiding thermal depression

November 1, 2012
A new way to protect a heating system.
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Larger than necessary

October 1, 2012
You’re probably oversizing expansion tanks in low-temperature systems.
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Hydraulic separation revisited

September 1, 2012
It doesn’t have to be perfect to be effective.
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BNP Media's Plumbing Group Visits Grundfos North American Headquarters

BNP Media’s Plumbing Group, comprised of the Plumbing & Mechanical, Supply House Times, PM Engineer (pme) and Reeves Journal brands, recently visited Grundfos’ new North American headquarters building in the western Chicago suburb of Downers Grove, Ill.


Plumbing and Mechanical

March 2014

2014 March

In the March issue of Plumbing & Mechanical, read about the 'living in place' movement and learn how to make your space stylish and comfortable. PM catches up with MCAA president Chuck Fell and spoke with him about his goals for the year. Also in this issue, see the top products of 2013, see who is the March Truck of the Month, and read the latest Tool Tips.
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Trade Associations

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The Plumbing and Mechanical Store

2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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Clear Seas Research

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Truck of the Month

Truck of the month

Are you proud of how your service truck looks? Do the graphics give people whiplash as they drive by? Have your calls increased because people remember your truck — and your company name? If so, we’d like to see it, too! Click here to find out how your service truck could be chosen as PM's Truck of the Month.



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