Articles by John Siegenthaler, P.E.

Our industry needs more focus on distribution systems

It’s not all about the boiler.
May 21, 2014

As an industry, we have to move beyond judging the quality of a hydronic system based solely on the heat source.


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How flow rate affects heat output

When “thinking mathematically,” most people think in proportions.
April 22, 2014

German water.


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Hydronic radiant ceiling cooling for smaller buildings.

Removing limitations on radiant heating systems.
March 17, 2014

Well-designed and properly installed hydronic radiant heating systems have earned a deserved reputation for superior comfort. Even so, many people hesitate on using these systems because they can’t just push a button on their thermostat to change the system from heating to cooling.


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Expansion tank pressurization

Improper air-side pressurization 'wastes' some of the internal volume.
February 20, 2014

All closed-loop hydronic systems require an air space to absorb the increased volume of water as it warms during system operation. In most hydronic systems, this task is handled by an expansion tank. In most modern hydronic systems, it’s handled by a diaphragm-type expansion tank.


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Talking to my computer

My first experience teaching an online course.
January 23, 2014

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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Combining outdoor reset control and heat pumps

Don’t overcook it.
December 19, 2013

In past columns, we’ve discussed geothermal water-to-water heat pumps and air-to-water heat pumps via hydronic heat sources. Both can be a great match to low-temperature hydronic distribution systems.


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Some ways to simplify hydronic systems

Less is best when it comes to hydronic heating systems.
November 18, 2013

After completing a hydronic installation, especially one that’s taken you a few days longer than expected, do you ever ponder that there is just too much “stuff” in some of these systems?


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T and ∆T pumping when it comes to wood-gasification boilers

One application that leverages both control capabilities.
October 18, 2013

The market for wood-gasification boilers is growing in North America. Most are used in rural areas where natural gas in not available, and thus the cost of firewood is often very competitive against the alternatives of No. 2 fuel oil or propane.


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Parsing a number

Differences exist between rules of thumb and precise calculations.
September 20, 2013

 

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.
August 22, 2013

 The following formula has been around the North American hydronics industry for a long time:  


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2014 Truck of the Month

PM has featured so many great plumbing service trucks! See plenty of them here in our Truck Of The Month Archives page. Are you proud of your truck? Go to our Truck of the Month page to find out how your service truck could be chosen!

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HOLDRITE will be hosting a free webinar for Firestop Systems on Tuesday, August 19, 2014.

Plumbing and Mechanical

June 2014

2014 June

In the June issue of Plumbing & Mechanical, read about the Burke Agency and find out why they are the 2014 Plumbing & Mechanical Rep of the Year. Read about the latest method for renewable fuel, what to take into account when installing indoor climate systems and learn to be a trusted advisor with the 2015 water heater regulations. Find out who is this month's Truck of the Month, read this month's Tool Tips and check out the latest products and news from the plumbing and mechanical industry.
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