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Home » Topics » Radiant & Hydronics

Radiant & Hydronics
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01 PM 0823 CLM John Siegenthaler feature
Hydronics Workshop | John Siegenthaler

Relays and switches — part two

Building the brains for custom hydronics systems.
John Siegenthaler, P.E.
August 1, 2023

Last month, we covered the basics of classifying switches and relays based on poles and throws. Once you learn these, it’s easy to apply switches and relays to create “hard-wired” control logic - part two.


Read More
PM 0723 Dan Holohan Column feature image

Dan Holohan: Do you prefer educated customers?

Contractors weigh in on customer education preferences.
Dan Holohan
July 5, 2023

Over the years, I've had many homeowners read my books and then write to tell me they knew more about their system than the contractors that came to their houses. This was particularly true when it came to steam heating.


Read More
01 0723 Column John Siegenthaler main image
Column | John Siegenthaler

John Siegenthaler: Relays and switches — part one

The basics.
John Siegenthaler, P.E.
July 3, 2023

The basics of relays and switches - part one.


Read More
PEX piping

6 reasons why PEX excels in commercial hydronic distribution applications

PEX offers numerous jobsite benefits for commercial projects.
Kim Bliss
June 19, 2023

Historically specified and installed as radiant heating and cooling or snow- and ice-melting systems pipe, PEX is now trending as a viable hydronic distribution pipe for heating hot water and chilled water applications.


Read More
Blue Boiler

Dan Holohan: The importance of training and educating yourself on the equipment you work on

Magical thinking
Dan Holohan
June 2, 2023

It was one of those days at HeatingHelp.com when the old guys had the floor. One of the regulars, a retired (and understandably crotchety) fella from Canada had this to say:


Read More
manifold systems

John Siegenthaler: Extended manifold systems

Less tubing, less drilling, less fastening.
John Siegenthaler, P.E.
June 1, 2023

Several years ago, I had the opportunity of visiting the Mostra Convegno Expocomfort show in Milan, Italy. It ranks right up there with the famous ISH show in Frankfurt, Germany, as a “bucket list” event for those who are passionate about hydronic heating and plumbing.


Read More
glitch-fix-feature

The Glitch & The Fix: Upside down

May 29, 2023

Take a look at Figures 1, 2a and 2b. What do they have in common? Can you think of some better ways to accommodate the flexible tubing?


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Snow-melt systems are common in Park City, Utah

Steering clear of snow

Elaborate system keeps driveway clean for Utah homeowner.
Thomas Renner
May 23, 2023

The first snowflakes hit the ground in Park City, Utah, in late October, before a single peanut butter cup hit the bottom of the Halloween bag. The first snow of the 2022 season dumped 10 inches of fresh powder on the town on Oct. 23, giving skiers and winter sports enthusiasts an early start to their activities.


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ServiceTitan’s Chris Hunter

Inflation Reduction Act offers opportunities for plumbing contractors

ServiceTitan’s Chris Hunter discusses how contractors can grow their workforce and maximize existing labor to capitalize on opportunities presented by the IRA.
Nicole Krawcke head shot 2024
Nicole Krawcke
May 17, 2023

ServiceTitan’s Chris Hunter discusses how contractors can grow their workforce and maximize existing labor to capitalize on opportunities presented by the IRA.


Read More
Solar panels

The USHGC: Putting the pieces together

The 2021 USHGC is one tool to help ensure high-quality radiant installations.
Hugo Aguilar P.E.
Hugo Aguilar, P.E.
May 16, 2023

The Uniform Solar, Hydronics and Geothermal Code (USHGC) includes provisions for alternative energy sources for the transfer of energy in a hydronic system for space heating and cooling, or for other purposes such as snow and ice melting.


Read More
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Radiant & Hydronics All-Stars Roundtable 2025

Radiant & Hydronics All-Stars Roundtable 2025

IPEX celebrates grand opening of new Florida distribution center

IPEX celebrates grand opening of new Florida distribution center

Radiant All Stars Roundtable discusses low-temperature systems, and more

Radiant All Stars Roundtable discusses low-temperature systems, and more

AI can boost efficiency and profitability for plumbing, HVAC contractors

AI can boost efficiency and profitability for plumbing, HVAC contractors

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Figure 1

Right & wrong: Examining common design pitfalls, and how to optimize piping strategies

Daniel, a plumber with Jolly Plumbing, walking away from a Jolly work truck, a house in the background.

Meet the 2025 Residential Contractor of the Year: Jolly Plumbing, Drains, Heating & Air

Figure 3 and Figure 5 feature image

Hindsight - From complex loops to clean headers: simplifying for reliability

Register for the November 13 PM Grundfos Webinar: Smart Pumping Strategies for HVAC: Unlock Efficiency with Grundfos E-Pumps and Systems

Events

November 13, 2024

Future Proofing MEP: Navigating the 2026 High Efficiency Water Heating Standards

Join our deep dive into DOE’s new standards so you can future-proof your MEP practice.

EARN: 0.1 ASPE CEU; 1 AIA LU/HSW; 0.1 IACET CEU*; 1 PDH

November 13, 2025

Smart Pumping Strategies for HVAC: Unlock Efficiency with Grundfos E-Pumps and Systems

Learn how to optimize energy use, improve system control, and simplify pump selection using the Grundfos SELECT tool.

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  • NEWS
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  • CONTRACTORS
    • BATH & KITCHEN PRO
    • BUSINESS MANAGEMENT
    • HIGH EFFICIENCY HOMES
    • TECHNOLOGY
    • WATER TREATMENT
    • PMC COLUMNS
      • Dave Yates: Contractor’s Corner
      • John Siegenthaler: Hydronics Workshop
      • Kenny Chapman: The Blue Collar Coach
      • Matt Michel: Service Plumbing Pros
      • Scott Secor: Heating Perceptions
  • ENGINEERS
    • CONTINUING EDUCATION
    • DECARBONIZATION | ELECTRIFICATION
    • FIRE PROTECTION
    • GEOTHERMAL | SOLAR THERMAL
    • PIPING | PLUMBING | PVF
    • PME COLUMNS
      • Christoph Lohr: Strategic Plumbing Insights
      • David Dexter: Plumbing Talking Points
      • James Dipping: Engineer Viewpoints
      • John Seigenthaler: Renewable Heating Design
      • Lowell Manalo: Plumbing Essentials
      • Misty Guard: Guard on Compliance
  • RADIANT & HYDRONICS
    • RADIANT COMFORT REPORT
    • THE GLITCH & THE FIX
  • INSIGHTS
    • CODES
    • GREEN PLUMBING & MECHANICAL
    • PROJECT PROFILES
    • COLUMNS
      • Codes Corner
      • Natalie Forster: Editorial Opinion
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