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John Siegenthaler, P.E.

John Siegenthaler, P.E., is a consulting engineer and principal of Appropriate Designs in Holland Patent, New York. In partnership with HeatSpring, he has developed several online courses that provide in-depth, design-level training in modern hydronics systems, air-to-water heat pumps and biomass boiler systems. Additional information and resources for hydronic system design are available on Siegenthaler’s website, www.hydronicpros.com.

Articles

ARTICLES

Supplying two loads for multiple boiler system

The Glitch & The Fix, May 2016

John Siegenthaler, P.E.

May 16, 2016

An installer has piped a multiple boiler system to supply two loads.

Simple yet elegant hydronic systems

As the North American hydronics industry has grown, so has the complexity of its systems.

John Siegenthaler, P.E.

April 19, 2016

Hydronic systems donít have to be large or complex to be state-of-the-art.

The Glitch and The Fix, April 2016 -- Glitch drawing

Wood-gasification boiler with existing piping

John Siegenthaler, P.E.

April 11, 2016

An installer plans to replace an outdoor wood-fired furnace with a new cordwood-gasification boiler with a rated output of 150,000 Btu/hr. The outdoor furnace is located about 100 ft. from the indoor mechanical room where the 1-in. PEX insulated underground piping joins the thermal storage tank. The installer plans to use the existing underground piping.

John Siegenthaler: Renewable Heating Design

Different ways to pipe a thermal storage tank

Four-pipe vs. two-pipe.

John Siegenthaler, P.E.

March 22, 2016

Different ways to pipe a thermal storage tank.

How to optimize coil heat exchanger flow

Flow face off.

John Siegenthaler, P.E.

March 21, 2016

Many systems that use renewable energy heat sources have large thermal storage tanks.

Optimizing coil heat exchanger flow

Flow face off.

John Siegenthaler, P.E.

March 21, 2016

Many systems that use renewable energy heat sources have large thermal storage tanks.

Modified primary/secondary hydronic piping system

March 2016 The Glitch and The Fix

John Siegenthaler, P.E.

March 18, 2016

An installer wants to achieve hydraulic separation between three zone circulators. He also wants to have the same supply water temperature to each zone, so he pipes up what he calls a “modified primary/secondary system.”

Pellet boiler control strategies

The control logic for this system was based on a pellet boiler that operated under its own internal controller.

John Siegenthaler, P.E.

February 16, 2016

Outdoor reset can improve performance.

Controlling a pellet boiler system

John Siegenthaler, P.E.

February 16, 2016

Outdoor reset can improve performance.

February 2016 The Glitch & The Fix -- Glitch drawing

Hydraulic separator piping to indirect water heater, boilers

The Glitch & The Fix, February 2016

John Siegenthaler, P.E.

February 11, 2016

A designer needs to connect an indirect water heater to a multiple boiler system. He selects a hydraulic separator and connects the piping of the indirect water heater on the same side as the boilers.

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