Articles by John Siegenthaler, P.E.

Tilting at collectors

Mounting solar panels at the proper angle is critical in maximizing system performance.
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Transitions, Part 1

Using wood-fired heat sources in conjunction with conventional fuel.
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Pavement To Pool

A possible operating mode for some hydronic systems.
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Retirement Party

After 30 years, it was time for a solar refresh.
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Smart Balancing - Part 2

The proper application of pressure-independent balancing valves.
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Smart Balancing - Part 1

An introduction to pressure-independent balancing valves.
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Lowered Expectations

The future of hydronics is low water temperature.
The future of hydronics is low water temperature.
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Paired Renewables

Combining the attributes of solar thermal collectors and a wood-gasification boiler.
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Hydronics Holds It All Together

Integrating renewable energy heat sources with contemporary HVAC technologies.
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Partial Coverage

Radiant panels don’t have to cover an entire floor, wall or ceiling.
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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


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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Where do you look for new employees?

Where do you look for new employees?
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The Plumbing and Mechanical Store

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.