John Siegenthaler on Muck Rack

John Siegenthaler

Verified
United States
As seen in: PM Engineer, Plumbing & Mechanical, The Journal of Light Construction, The NEWS (ACHR), Supply House Times, HPAC Magazine, reevesjournal.com
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Articles

An Open & Shut Case (part 1)

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By John Siegenthaler Verified
| Plumbing & Mechanical Verified
Although there’s a lot of interest in battery-based systems, energy storage is not limited to electricity. There are applications where thermal energy storage has a decided advantage over batteries in terms of life cycle cost, safety, and resource efficiency. Water is the best stuff on earth for storing sensible heat (e.g., where the material storing the heat changes temperature but not phase).
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Have It Both Ways – Hydronic Heating and Cooling

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By John Siegenthaler Verified
| HPAC Magazine Verified
Typical console fan coil option (image courtesy Myson). The availability of heat pumps has made it possible for those who design and install hydronic heating to expand their offerings to include cooling. And one of the simplest approaches uses a single air handler with a chilled water coil to supply a ducted forced-air distribution system. In average houses this single zone approach to cooling can be combined with multi-zone hydronic heating.
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Seizing Control

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By John Siegenthaler Verified
| Plumbing & Mechanical Verified
Air-to-water heat pumps are different from boilers. As the outdoor air temperature decreases, their heating output decreases. That’s a characteristic of all air-source heat pumps, and it runs opposite to how heating load changes with decreasing outdoor temperature. Considered together, these two characteristics imply that at some outdoor temperature the output of the heat pump is the same as the heating load of the building. That condition is called the “balance point” temperature.
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