Articles by John Siegenthaler, P.E.

A designer needs to connect an indirect water heater to a multiple-boiler system.

Today's models combine aesthetics with performance.

The owner loves the idea of warm floors, but also wants nail-down hardwood flooring.

Interfacing wood gasification boilers with modern hydronics.

Circulators are experiencing overheating issues. There’s also heat getting into zones when that heat is not needed.

Not from the boiler, but from the point of no pressure change.

Freeze protection without antifreeze.

When it comes to hydronic headers, short and fat is good!

In some systems, outdoor reset control can vary the supply water temperature from a relatively high design temperature down to just above room temperature.

A critical notion if hydronic technology is to maintain a leading role in residential construction.