Articles by John Siegenthaler, P.E.

Microflows<br>John Siegenthaler

Heating a 2,500-square-foot house with a 40-watt circulator.
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Take The High Road<br>John Siegenthaler, P.E.

Some advice for aspiring hydronic heating professionals.
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Two Certainties

Hydronic systems, like nature, want balance.
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Fewer Bridges To Cross<br>John Siegenthaler

Alternatives to parallel primary loops.
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Heating A 'Thermos Bottle' House<br>John Siegenthaler

Full-coverage radiant floors may not be the best choice.
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Disappearing Btus<br>John Siegenthaler, PE

The boiler isn't the only source of heat in many hydronic systems.
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Picturing ∆P<br>John Siegenthaler, PE

Visualizing pressure differences is key to proper hydronic design.
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Thermal Equilibrium<br>John Siegenthaler, PE

Achieving a balance between heat emitter area and supply water temperature.
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NEW!!<br>The Glitch & The Fix -- June 2006

Learn to design more efficiently by troubleshooting the following hydronic schematic. The answer to this "glitch" can be found in PM's twice-montly e-newsletter Radiant & Hydronics e-News. Sign up for free here.
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Backward Thinking

What happens when flow reverses in primary/secondary systems?
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2014 December

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2015 National Plumbing & HVAC Estimator

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Truck of the Month

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Are you proud of how your service truck looks? Do the graphics give people whiplash as they drive by? Have your calls increased because people remember your truck — and your company name? If so, we’d like to see it, too! Click here to find out how your service truck could be chosen as PM's Truck of the Month.