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Home » Authors » John Siegenthaler, PE
John Siegenthaler, PE

John Siegenthaler, PE

John Siegenthaler, P.E.
Principal of Appropriate Designs
john@hydronicpros.com

The third edition of his book, Modern Hydronic Heating,
is now available. For details, visit www.hydronicpros.com.
 

Articles

ARTICLES

FIGURE 1: A comparison of typical residential finned-tube baseboard output with and without the 15 percent heating effect factor. - ACHR News

How to Properly Size Finned-tube Baseboard Heat Emitters

Divide by 1.15
Headshot siegmugshtnew
John Siegenthaler, PE
October 8, 2018
No Comments
It goes on to say baseboard ratings include an allowance for heating effect factors of 15 percent in addition to the test capacity, which must be shown in the manufacturer’s literature.
Read More
FIGURE 1

Examining the effects of flow reversal in circulators

Headshot siegmugshtnew
John Siegenthaler, PE
December 18, 2017
One Comment
Unique design concepts sometimes require com-ponents to operate in nonstandard conditions.
Read More
boiler vent

Protecting Boilers Against Flue Gas Condensation

Follow the laws of thermodynamics
Headshot siegmugshtnew
John Siegenthaler, PE
August 14, 2017
One Comment
Anytime you conjure up a new idea about how a heating or cooling system might work, test it against the laws of thermodynamics.
Read More
drainback system

Solar Freeze Protection

Why I prefer drainback solar thermal systems
Headshot siegmugshtnew
John Siegenthaler, PE
Harold Simmons
March 20, 2017
No Comments
Drainback systems are designed so water, or other fluid within the collector circuit, drains back to an interior storage tank whenever the collector circulator is not operating.
Read More
Figure 1

The Origin of Hydraulic Separation

Headshot siegmugshtnew
John Siegenthaler, PE
December 12, 2016
No Comments

The constant variation in loads means water temperatures along the primary circuit could vary over a significant range. How do you properly size a heat emitter if you don’t know what the supply water temperature might be, depending on what other loads are active?


Read More
Figure 1

Hydronics Zone: Radiant Provides Year-Round Comfort

Radiant cooling opportunities await but they must be done right
Headshot siegmugshtnew
John Siegenthaler, PE
August 15, 2016
No Comments

The term radiant heating makes most people think about warm floors. Although it’s true there are many excellent applications for radiant floor heating, it’s not the only type of radiant panel that can deliver excellent comfort. 


Read More
FIGURE 1: An electrical schematic for the cooling mode of the system.

Dual-fuel Combisystem: The Benefits of Geothermal

Using hydronics to harmonize renewable and conventional heat sources
Headshot siegmugshtnew
John Siegenthaler, PE
May 30, 2016
No Comments

This system demonstrates how modern hydronics technology can be used to harmonize the operation of two high-efficiency heat sources — one renewable and the other conventional.


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FIGURE 1

Hydronics Zone: In Over Your Head

Radiant ceilings are a great option in many systems
Headshot siegmugshtnew
John Siegenthaler, PE
February 15, 2016
No Comments

If you’ve never tried a radiant ceiling panel, I urge you to do so. I’ve used this panel construction on several projects and have always been delighted with the installation method, performance, and lack of problems. 


Read More
FIGURE 1: One way to avoid short-cycling issues is to install a thermal storage tank between the pellet-fueled boiler, as shown here.

Hydronics Zone: The Evolution of Biomass Boilers

Combining biomass-fueled boilers and modern hydronics to form an efficient system
Headshot siegmugshtnew
John Siegenthaler, PE
November 30, 2015
No Comments

Modern biomass boilers are as different from earlier-generation wood-burning boilers as smartphones are from their rotary-dial predecessors. 


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FIGURE 1: This partial system schematic is configured to supply domestic water preheating, as well as space heating, to a low-temperature/highly zoned distribution system.

Hydronics Zone: Combining a Water-to-Water Heat Pump With a Mod/Con Boiler

The boiler can be configured to provide supplemental heat when the heat pump can’t keep up
Headshot siegmugshtnew
John Siegenthaler, PE
July 27, 2015
No Comments

The boiler can be configured to provide supplemental heat when the heat pump can’t quite keep up with the load. This allows the heat pump to be sized for 50 percent to 75 percent of design load while still providing the majority of the total seasonal heating energy requirement.


Read More
View All Articles by John Siegenthaler, PE
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