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Home » Topics » Radiant & Hydronics Columns » John Siegenthaler: Hydronics Workshop

John Siegenthaler: Hydronics Workshop
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Siegenthaler PM

Properly sizing and operating circulators

Reducing head loss reduces the kWh of electrical energy required to operate them.
Siegenthaler
John Siegenthaler, P.E.
July 21, 2017
One Comment

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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Siegenthaler PM

The disproportionate world of hydronics

Siegenthaler
John Siegenthaler, P.E.
June 16, 2017
No Comments

The math associated with some of our assumptions can lead to incorrect conclusions.


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Siegenthaler PM

Continuous circulation in floor-heating circuits

Siegenthaler
John Siegenthaler, P.E.
May 19, 2017
No Comments

Keep water moving to prevent frozen pipes and other issues.


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Siegenthaler PM

The finer points of applying a 2-pipe buffer tank

Siegenthaler
John Siegenthaler, P.E.
April 28, 2017
No Comments

There are advantages to using this piping configuration in hydronic systems.


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Siegenthaler PM

How to properly size finned-tube baseboard heat emitters

Have a look at the rating tables for most finned-tube baseboard sold in North America and chances are you’ll see a footnote.
Siegenthaler
John Siegenthaler, P.E.
March 29, 2017
2 Comments

Have a look at the rating tables for most finned-tube baseboard sold in North America and chances are you’ll see a footnote under the table that reads something like this: “Ratings are based on active fin length and include 15% heating effect factor.”


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Siegenthaler PM

Examining the effects of flow reversal in circulators

Unique design concepts sometimes require components to operate in non-standard conditions.
Siegenthaler
John Siegenthaler, P.E.
February 17, 2017
No Comments

There are hydronic design concepts in which flow must pass backward through a non-operating circulator, perhaps thousands of times over the life of the system.


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Siegenthaler PM

When is flow reversal practical?

Increasing heat output.
Siegenthaler
John Siegenthaler, P.E.
January 18, 2017
No Comments

Flow reversal is possible in a P/S system, but is it practical?


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Siegenthaler PM

When and how to use reverse return piping

In many hydronic systems, there’s a need to divide the overall system flow into equal streams that pass through several identical components.
Siegenthaler
John Siegenthaler, P.E.
November 16, 2016
2 Comments

When — and when not — to use reverse return piping.


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Siegenthaler PM

Options for achieving hydraulic seperation between circulators

Keeping the peace.
Siegenthaler
John Siegenthaler, P.E.
October 5, 2016
No Comments

Twenty years ago, the contemporary approach to prevent interference between simultaneously operating circulators in a hydronic system was primary/secondary piping.


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Siegenthaler PM

Primary/secondary systems need proper detailing to work correctly

Double dipping in primary/secondary systems.
Siegenthaler
John Siegenthaler, P.E.
September 28, 2016
No Comments

A seemingly good idea that doesn’t work.


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