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Home » Authors » John Siegenthaler, P.E.

Articles by John Siegenthaler, P.E.

Siggy

John Siegenthaler: Your customers don’t pay for COPs

Understanding coefficient of performance.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
July 1, 2021

The measure of a heat pump’s heating performance is called coefficient of performance (COP). It’s the ratio of useful heat output divided by required energy input, where both the output and input are expressed in the same physical units.


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Siggy

John Siegenthaler: Keeping your cool

Important details for small-scale chilled water cooling.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
May 26, 2021

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: Respecting the Laws — of thermodynamics

How the most fundamental principle applies to heating.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
May 5, 2021

One of the most fundamental principles used in all areas of science and engineering is the first law of thermodynamics. 


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Siggy

John Siegenthaler: A diversionary detail

Another circumstance where hydronic versatility adds value.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
April 27, 2021

The heating output and coefficient of performance (COP) of any hydronic heat pump is very dependent on the water temperature leaving the heat pump’s condenser. 


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Siggy

John Siegenthaler: 4-way versus 3-way motorized mixing valves

Which is the better choice, and why?
John Siegenthaler, P.E.
John Siegenthaler, P.E.
April 1, 2021

Although the market for gas-fired boilers continues to track toward those that can modulate and operate with sustained flue gas condensation, conventional boilers (e.g., those not designed to operate with sustained flue gas condensation) still represent a significant portion of the market. 


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Siggy

John Siegenthaler: Unique circumstances

Multi-zone heating, single zone cooling.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
February 26, 2021

As global energy planning moves away from fossil fuels and toward electricity, an increasing number of hydronic heating systems are being supplied by heat pumps. 


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Siggy

John Siegenthaler: Cascading heat pumps

Electrically-powered heat pumps will continue to gain market share.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
January 23, 2021

Heat pumps are incredibly useful devices. 


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Siggy

John Siegenthaler: Chump change

The minuscule cost of operating a well-designed hydronic distribution system.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
December 22, 2020

Hydronic heating professionals often promote the concept that current generation mod/con boilers can operate with AFUEs in the range of 95% and above. 


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John Siegenthaler: Renewable Heating Design

John Siegenthaler: The anatomy of a municipal pellet boiler system

A thousand words plus.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
December 4, 2020

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


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Siggy

John Siegenthaler: Combining heat pumps with buffer tanks

Consider a buffer tank between the heat source and distribution system.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
November 25, 2020

Whenever a hydronic system is divided into several zones, it’s worth considering a buffer tank between the heat source and distribution system. 


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    • PMC COLUMNS
      • Dave Yates: Contractor’s Corner
      • John Siegenthaler: Hydronics Workshop
      • Kenny Chapman: The Blue Collar Coach
      • Matt Michel: Service Plumbing Pros
      • Scott Secor: Heating Perceptions
  • ENGINEERS
    • CONTINUING EDUCATION
    • DECARBONIZATION | ELECTRIFICATION
    • FIRE PROTECTION
    • GEOTHERMAL | SOLAR THERMAL
    • PIPING | PLUMBING | PVF
    • PME COLUMNS
      • Christoph Lohr: Strategic Plumbing Insights
      • David Dexter: Plumbing Talking Points
      • James Dipping: Engineer Viewpoints
      • John Seigenthaler: Renewable Heating Design
      • Lowell Manalo: Plumbing Essentials
      • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
    • RADIANT COMFORT REPORT
    • THE GLITCH & THE FIX
  • INSIGHTS
    • CODES
    • GREEN PLUMBING & MECHANICAL
    • PROJECT PROFILES
    • COLUMNS
      • Codes Corner
      • Natalie Forster: Editorial Opinion
      • Guest Editorial
    • SPONSOR INSIGHTS
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