John Siegenthaler

About John Siegenthaler

John Siegenthaler, P.E., is a mechanical engineer and graduate of Rensselaer Polytechnic Institute, a licensed professional engineer, and Professor Emeritus of Engineering Technology at Mohawk Valley Community College. “Siggy” has over 32 years of experience in designing modern hydronic heating systems. He is a hall-of-fame member of the Radiant Professionals Alliance and a presenter at national and international conference on hydronic and radiant heating. John is principal of Appropriate Designs – a consulting engineering firm in Holland Patent, NY. The 3rd edition of his textbook – Modern Hydronic Heating – was released in January 2011. John currently writes about hydronic heating and solar thermal system design for several trade publications.

John Siegenthaler Investigates: Low Ambient Air-to-Water Heat Pumps

Low Ambient Air-to-Water Heat Pumps: An emerging renewable heat source for North American hydronic systems.
Electrically powered heat pumps, in many varieties, are destined to play an increasingly important role in heating and cooling buildings around the world.

Heat pumps capture low grade heat from solar-resupplied sources such as outside air and soil several feet below the earth’s […]

Protection Considerations for Wood Gasification Boilers

Enroll in this free, 58-minute lecture and learn about the protection of wood gasification boilers.

Enroll today and learn more about the protection of boilers against low entering water temperature and against overheating during power failures.

I will discuss the dewpoint of exhaust products, how to protect wood-fired boilers against low water temperatures through thermostatic bypass valves, loading […]

Sizing a Pellet-Fueled Boiler

Sizing a Pellet-Fueled Boiler
Bigger is NOT better
There are several types of boilers that can burn wood-based fuels. They include 2- stage wood-gasification boilers, wood chip boilers, and pellet-fueled boilers. Of these, pellet-fuel boilers come closest to mimicking the fully automatic operation of oil and gas- fired boilers. Modern pellet boilers can automatically load their fuel, […]

Hydronic Heating with Renewable Energy Heat Sources

Hydronic Heating with Renewable Energy Heat Sources
Designing for low water temperatures is critical to good performance
This article focuses on using water-based hydronic distribution systems to distribute heat produced by renewable energy heat sources. It’s based on the premise that good hydronic design is the “glue” that holds together nearly all thermally based renewable energy systems […]

[Free Tool] Siegenthaler’s ‘Hydronics Design Studio 2.0’ Demo

We created the Hydronics Design Studio (HDS) to assist heating professionals in designing high performance hydronic heating systems.  It represents the state-of-the-art in computer-assisted design for modern hydronic heating systems.  Thousands of professionals use the HDS, but if you’re not yet familiar with it, I’d like to offer you a free demo version to get acquainted with the […]