Articles by John Siegenthaler, P.E.

Fluid Factors
John Siegenthaler, PE

A look at formulas relating heat transfer to flow rate.
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Sunny Side Up
John Siegenthaler, PE

Some more ways to merge conventional hydronics and active solar energy subsystems.
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Seasons In The Sun
John Siegenthaler, PE

Using hydronics and solar energy together.
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Thermal Clutches
John Siegenthaler, PE

A new way to create smart boiler bypasses.
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Valve Smarts
John Siegenthaler, PE

A mixing valve without 'brains' will not properly perform.
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Shakeout Time
John Siegenthaler, PE

Plateless staple-up may not be up to the challenge of frigid winter climates.
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The Long Way Around
John Siegenthaler, PE

One way to correct excessively long hydronic circuits.
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Radiant Forum

John Siegenthaler has the answers to the questions you've been asking.
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Stud Factors
John Siegenthaler, PE

An effective total R-value will make your heat load calculations more accurate.
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Garage Warming
John Siegenthaler, PE

A “must have” when planning a new hydronic space heating system in a cold and snowy climate.
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2014 Truck of the Month

PM has featured so many great plumbing service trucks! See plenty of them here in our Truck Of The Month Archives page. Are you proud of your truck? Go to our Truck of the Month page to find out how your service truck could be chosen!

1/27/15 2:00 pm EST

Grow Your Business and Improve Operations with New Payment Technology

Attend this free webinar to learn how new developments in payment technology can help you close more jobs, increase upselling opportunities and improve operations.

Plumbing and Mechanical

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2015 January

The January issue of PM features cover story: 2015 Plumbing Contractor of the Year: Jim Steinle and Atomic Plumbing.

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2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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Truck of the Month

Truck of the month

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.