Articles by John Siegenthaler, P.E.

Exploring microbubble air separation in hydronic systems.

Hardware consolidation will hasten adoption of active solar energy systems.

Get ready for circulators with different personalities.

Trimming away extraneous design details and hardware for the most efficient hydronic heating systems.

A heating contractor, who’s tired of coaxing 500-pound cast-iron boilers into homes, decides to try out a wall-mounted mod/con boiler because of its light weight and side wall venting.

It’s not the professional way to select a circulator.

The installer feels that a mix of primary/secondary piping along with some “alternative techniques” is appropriate.

Dealing with performance numbers expressed in different units.

As part of an extensive renovation and insulation upgrade, the owner decides to upgrade the heat and convert the 2-pipe steam system to hot water.

All of them leverage the advantages of parallel-connected heat sources and loads, speed installation and reduce mechanical room space requirements.