John Siegenthaler, P.E.

Avoid lightweight concrete for heated slabs.

An efficient hydronic system is more than just a high-performance boiler.

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

Einstein’s definition of insanity was doing the same thing over and over and expecting different results.

Wet-rotor circulator technology got to where it is today through continuous design and manufacturing improvement.

All boilers that aren’t designed to operate with sustained flue-gas condensation should be protected against sustained flue-gas condensation.

Hydronics has long been known for unsurpassed heating comfort

It’s time to get serious about water quality in hydronic systems.

I know that proper system design can quickly rid just about any hydronic system of air and keep it that way.