Articles by John Siegenthaler, P.E.

It’s energy cost savings that really matter.

An unpressurized outdoor wood-fired heater is installed to supply heat to fin-tube baseboard install in a two-story home.

Some things don’t vary proportionally.

What is the purpose of a check valve?

Assuming that the aquastat is operating correctly, and that essential details are all present and correctly installed, why is the system behaving this way?

Assuming that the aquastat is operating correctly, and that essential details are all present and correctly installed, why is the system behaving this way?

Every hydronic system has one or more controllers that measure and respond to temperature.

When designing hydronic circuits, most of us focus on what’s necessary for that circuit to absorb thermal energy at a heat source, carry it along like a conveyor belt and release that energy at one or more heat emitters.

The math associated with some of our assumptions can lead to incorrect conclusions.

Keep water moving to prevent frozen pipes and other issues.