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Home » Topics » Radiant & Hydronics

Radiant & Hydronics
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Carlson-Holohan-Award.gif

Caleffi to host Carlson-Holohan Industry Award of Excellence presentation at 2025 AHR Expo

November 5, 2024

The award is presented every two years to a nominee with attributes including technical mastery and a passion for hydronic technologies, demonstrated leadership as an educator and mentor, and an aptitude for cultivating fundraising opportunities for industry causes.


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Heat Pump, vertical ground source, 3d illustration
Hydronics Workshop | John Siegenthaler

How to create your own flush cart for hydronic heating systems

Budget flushing
John Siegenthaler, P.E.
John Siegenthaler, P.E.
November 4, 2024

In 1986, I installed a 1.5-ton geothermal heat pump in my home using two 500-foot horizontal HDPE earth loops. After digging a trench, I connected the loops to the pump and opted for a 2 HP swimming pool pump to fill and flush the system, as a garden hose couldn't provide the needed flow rate.




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The Glitch & The Fix figure 1
The Glitch & The Fix

One size doesn't fit all when it comes to piping sizes

John Siegenthaler, P.E.
John Siegenthaler, P.E.
October 29, 2024

A project needs medium- and low-temperature radiant floor panels. The installer proposes using a mod/con boiler with a 1-inch tempering valve for lower temperatures and plans to pipe the entire system with 1-inch tubing. What potential issues could arise from this design?


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2024 Radiant and Hydronics eBook hero 1440x750.jpg
Sponsored Content

eBook | 2024 Radiant & Hydronics All Stars

The second edition of the Radiant & Hydronics All Stars eBook
October 21, 2024

This second edition of the Radiant & Hydronics All Stars eBook showcases the latest technology and design trends in the radiant and hydronic markets. It features insights from our All Star Roundtable on low-temperature systems and upcoming efficiency standards for circulator pumps by 2028, along with design trends for residential and commercial applications.


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Industrial Boilers
The Boiler Room | Ray Wohlfarth

Avoiding problems on your next hydronic boiler project

Best practice tips when replacing a boiler system.
ray wohlfarth
Ray Wohlfarth
October 16, 2024

Always assume the old boiler was installed wrong. This principle has served me well in my career by finding problems before we own the system.


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PM SHT Radiant and Hydronics Roundtable
Radiant All Stars – Podcast Video

Podcast Video: Radiant All Stars Roundtable

All Stars panelists discuss low-temperature radiant systems, new DOE efficiency mandates for circulator pumps and more.
October 10, 2024

Plumbing & Mechanical Chief Editor Nicole Krawcke moderates a discussion on all things radiant with our incredible panel of Radiant All-Stars.


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Environmentally Friendly Heat Pump Technology in Front of a brick house.
Hydronics Workshop | John Siegenthaler

The convergence of hydronics

Modern hydronic technology binds new technologies and desired outcomes together and creates unprecedented market opportunities.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
October 4, 2024

In 2024, the North American air-to-water heat pump market saw significant expansion, with nine new offerings introduced at the January AHR show by companies new to this category. By year's end, at least 18 companies either have or plan to offer these pumps in the U.S. Read the list of these companies as of mid-2024.



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The Glitch and The Fix Figures 1 and 2

The Glitch & The Fix: Identify the flow problems

September 27, 2024

The two photos below were from the same project. Flow is upward through the vertical pipe in Figure 1. Without any more details being described, can you spot at least two problems in each photo?


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Boulder, CO Job: Two Ambient Heat Pump Installation

Air-to-water heat pumps — a game changer for the hydronics industry

Traditional boiler manufacturers are entering the heat pump market with new air-to-water product offerings.
Nicole Krawcke head shot 2024
Nicole Krawcke
September 18, 2024

Air-to-water heat pumps are becoming popular in the hydronic heating industry due to their energy efficiency and sustainability. Chris Decato of U.S. Boiler Co. notes a rising demand driven by their cost-effectiveness and reduced carbon footprint.


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Boiler Room
Heating Perceptions | Scott Secor

A grossly oversized boiler system

Always follow the heat loss calculation.
Scott Secor
Scott Secor
September 9, 2024

Last fall, we assessed a boiler replacement project for a town hall. Three out of four existing rare condensing cast iron boilers were inoperable within two years, and seven out of eight boilers failed within 10 years. During our visit, we meticulously examined various aspects to identify any potential issues.


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

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  • CONTRACTORS
    • BATH & KITCHEN PRO
    • BUSINESS MANAGEMENT
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    • 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
      • Guest Editorial
    • SPONSOR INSIGHTS
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  • EMAGAZINE
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    • PME EMAGAZINE ARCHIVES
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