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Home » Authors » John Siegenthaler, P.E.

Articles by John Siegenthaler, P.E.

ductless mini-split heat pump system

John Siegenthaler: Air-to-water heat pumps offer more than ductless

Little white boxes
Siegenthaler
John Siegenthaler, P.E.
March 1, 2023
5 Comments

Government planners, taking their queues from politicians and advocacy organizations, have steered the future of energy supply away from fossil fuels and toward renewably-sourced electricity. It’s happening on every level from the feds right down to local city councils.


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hydronic heating system

John Siegenthaler: Adding a heat pump

Several possible approaches.
Siegenthaler
John Siegenthaler, P.E.
January 31, 2023
One Comment

Many legacy hydronic heating systems use a fossil fuel boiler to supply fin-tube baseboard heat emitters in some areas of a building and lower-temperature radiant panels in other areas. 


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hydronic systems

John Siegenthaler: Well-planned hydronic systems last far longer than modern appliances

Lasting value
Siegenthaler
John Siegenthaler, P.E.
January 3, 2023
2 Comments
Geothermal pipe passages

John Siegenthaler: Geothermal pipe passages

Bringing earth loop piping through poured concrete.
Siegenthaler
John Siegenthaler, P.E.
November 30, 2022
One Comment

Water-to-water heat pumps, supplied from geothermal earth loops, represent a growing sector of the hydronic heat source market. Most current-generation models can produce water temperatures up to about 125° F, perhaps a little higher if you’re willing to push the compressor operating envelope.


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boiler

John Siegenthaler: Variable speed circulators for boiler protection

Creating a thermal clutch to regulate energy transfer.
Siegenthaler
John Siegenthaler, P.E.
November 1, 2022
One Comment

 All boilers that burn hydrocarbon fuels such as natural gas, propane, oil or wood produce water vapor as a byproduct of combustion.


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panel radiator

John Siegenthaler: How 'radiant' are your radiators?

Panel radiators allow a wide range of design flexibility.
Siegenthaler
John Siegenthaler, P.E.
October 3, 2022
3 Comments

I’ve written it before and I’ll write it again — panel radiators are one of my favorite hydronic heat emitters. I base this sentiment on several benefits. Here are a few to consider…


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zoned hydronic system

John Siegenthaler: Differing Deltas

Both can work, but there are important distinctions.
Siegenthaler
John Siegenthaler, P.E.
August 31, 2022
No Comments

The choice between ∆T and ∆P operation of a circulator has, at times, been the subject of rather “heated” debates. It’s almost as if a few Yankee fans are disputing superior pitching or batting performance with a few Red Sox fans. There appears to be some strong opinions involved.


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Offer a total HVAC solution

John Siegenthaler: Heat recovery helper

Offer a total HVAC solution.
Siegenthaler
John Siegenthaler, P.E.
July 29, 2022
2 Comments

As building codes and programs such as Energy Star and Passive House require higher degrees of air sealing in new construction, the use of heat recovery ventilation (HRV) is increasing.


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double port purging valve

John Siegenthaler: Purging principles

Purging plays a major role in the reliable and efficient operation of closed loop hydronic systems.
Siegenthaler
John Siegenthaler, P.E.
July 5, 2022
No Comments

Nearly all closed-loop hydronic heating and cooling systems are supposed to be filled with water or a mixture of water and antifreeze. The only intentional air in the system is that contained in the expansion tank.


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contemporary approach to providing fresh air

John Siegenthaler: Don't forget about ventilation

Offer a total solution
Siegenthaler
John Siegenthaler, P.E.
May 31, 2022
2 Comments

As residential building codes and energy conservation standards continue to evolve, many are requiring proof of high quality air sealing.


Read More
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