John Siegenthaler: Hydronics Workshop

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There are advantages to using this piping configuration in hydronic systems.

Have a look at the rating tables for most finned-tube baseboard sold in North America and chances are you’ll see a footnote under the table that reads something like this: “Ratings are based on active fin length and include 15% heating effect factor.”

There are hydronic design concepts in which flow must pass backward through a non-operating circulator, perhaps thousands of times over the life of the system.

Flow reversal is possible in a P/S system, but is it practical?

When — and when not — to use reverse return piping.

Twenty years ago, the contemporary approach to prevent interference between simultaneously operating circulators in a hydronic system was primary/secondary piping.

A seemingly good idea that doesn’t work.

It’s not sexy, but outdoor reset is still a ‘smart’ choice.