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John Siegenthaler: Hydronics Workshop

John Siegenthaler gives a technical view of hydronic and radiant heating systems.

ARTICLES

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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Trade-offs in boilers

Two boiler characteristics that need to make a comeback.
July 18, 2013

 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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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.

THE MAGAZINE

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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