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Home » Authors » John Siegenthaler P.E.
John Siegenthaler P.E.

John Siegenthaler P.E.

John Siegenthaler, P.E., is a consulting engineer and principal of Appropriate Designs in Holland Patent, N.Y. His latest textbook “Heating With Renewable Energy,” will be released in January 2016 from Cengage Publishing. It shows how to use modern hydronics technology to create systems supplied by solar thermal, heat pump and biomass heat sources. Additional information is available at www.hydronicpros.com.

Articles

ARTICLES

John Siegenthaler: Renewable Heating Design

John Siegenthaler: An open and closed case

Using external heat exchangers with thermal storage.
Siegenthaler
John Siegenthaler P.E.
March 2, 2021
No Comments

In the closing days of 2020, the federal government approved one of the largest renewable energy spending bills in over a decade. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: Whittling away at watts

Reducing head loss in hydronic systems reduces the kilowatt-hours of electrical energy required for operation.
Siegenthaler
John Siegenthaler P.E.
February 3, 2021
No Comments

When designing hydronic circuits, most of us focus on what’s necessary for that circuit to absorb thermal energy at a heat source, carry it along like a conveyor belt and release that energy at one or more heat emitters. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: Good intentions

The principles of physics don’t care about codes and standards.
Siegenthaler
John Siegenthaler P.E.
December 28, 2020
No Comments

I don’t know about you, but after more than 40 years of working in the HVAC industry I find myself a bit overwhelmed trying to keep up with standards, codes and other well-intentioned regulations, issued by “authorities having jurisdiction,” or sometimes by “authorities” not having jurisdiction, but looking to cash in by grabbing the steering wheel on some of the latest trends in HVAC technology.


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: The anatomy of a municipal pellet boiler system

A thousand words plus.
Siegenthaler
John Siegenthaler P.E.
December 4, 2020
No Comments

I’m sure everyone reading this column has heard the adage “a picture is worth a thousand words.”  


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: An internal matter

How internal heat gains “skew” heating loads.
Siegenthaler
John Siegenthaler P.E.
November 4, 2020
No Comments

The classic way of estimating heating load in smaller, envelope-dominated buildings is to assume the rate of heat loss is proportional to the difference between the inside and outside temperature.


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: It makes a difference

Domestic hot water plus space heating using an air-to-water heat pump.
Siegenthaler
John Siegenthaler P.E.
October 9, 2020
No Comments

In last month’s column, I presented a “template” for a system that provides space heating, cooling and domestic water heating using a cold climate air-to-water heat pump as the primary heat source, and the sole source of chilled water for cooling. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: One source does it all

Build your knowledge of modern hydronics technology.
Siegenthaler
John Siegenthaler P.E.
September 4, 2020
No Comments

For decades, fossil-fueled boilers have dominated the market for hydronic heat sources.


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hydronic heating systems

John Siegenthaler: Simple and effective

Keeping heat produced by an auxiliary boiler out of thermal storage.
Siegenthaler
John Siegenthaler P.E.
July 29, 2020
No Comments

Most hydronic heating systems that have renewable energy heat sources, such as solar thermal collectors, an air-to-water or geothermal heat pump or a biomass boiler also have an auxiliary heat source. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: Details for small-scale hydronic cooling

There are many products today that can provide both hydronic heating and cooling.
Siegenthaler
John Siegenthaler P.E.
July 2, 2020
One Comment

Most of the modern hydronics technology used in North America for residential and light commercial buildings is for heating. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: Calculated versus measured

Mathematics don’t always predict reality.
Siegenthaler
John Siegenthaler P.E.
June 10, 2020
No Comments
Formula 1 below should be recognized by anyone who designs hydronic heating and cooling systems.
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