We live in a world where most theoretical ideals can only be approached rather than fully realized.  

Although I’ve worked with hydronic heating for four decades, and designed systems around just about every possible heat source, I would be hard pressed to predict what might be available as hydronic heat sources 25 years from now.  

We are proud to present this fifth and final edition in the "Siggy" eBook series specifically for the hydronics market. Brought to you by Plumbing & Mechanical, PM Engineer and Supply House Times, this FREE eBook is a collection of columns and articles from John Siegenthaler, P.E., a well-respected hydronics expert.

The market for pellet-fueled “biomass” boilers continues to grow in North America. This market expansion is driven by several factors. 

Geothermal (a.k.a. ground-source) heat-pump systems continue to be a popular topic in HVAC discussions. Many state and federal agencies are now offering generous incentives for installation of geothermal heat pumps in both residential and commercial applications.

We are proud to present the fourth of five eBooks specifically for the hydronics market. Brought to you by Plumbing & Mechanical, PM Engineer and Supply House Times, this FREE eBook is a collection of columns and articles from John Siegenthaler, a well-respected hydronics expert.

I recently helped install a closed-loop geothermal heat pump system for my daughter, her husband and their 1-year old son, Henry.

All boilers that burn hydrocarbon fuels (gas, oil or wood) produce water vapor as a byproduct of combustion.

A commonality among all renewable energy heat sources is that they perform best when coupled to low-temperature hydronic distribution systems. 

The geothermal heat pump market is headed for another strong year in 2019. The 30% uncapped federal income tax credit on EnergyStar-rated geothermal heat pumps remains in full effect.