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Home » hydronics

Articles Tagged with ''hydronics''

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Radiant Comfort Report Spring 2025 Edition

Best Practices for performance, comfort and longevity

Mastering radiant installation
William Werthman author headshot 200x200
William Werthman
July 23, 2025

As radiant heating and cooling systems continue to grow in popularity for their superior comfort, energy efficiency, and quiet operation, the importance of proper system installation cannot be overstated. A poorly installed system—no matter how advanced its components—can fall short of expectations, leading to hot and cold spots, energy waste, or costly callbacks.


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Carlos Duarte Hybrid Systems graphic
Radiant Comfort Report Spring 2025 Edition

Radiant Professionals Alliance educating the industry

Resources and new technologies to stay up-to-date on radiant & hydronics.
Hugo Aguilar P.E.
Hugo Aguilar, P.E.
July 18, 2025

The Radiant Professionals Alliance (RPA) provides superior comprehensive educational activities and innovative product awareness. This was evident at the 2025 AHR conference held in Orlando Florida. The RPA hosted eight sessions providing education to professionals and students. From the eight sessions, I would like to highlight five that deal with industry patterns, installation practices and innovative design.


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Piping system in the ground.
Radiant Comfort Report Spring 2025 Edition

Thermal energy networks and the future of radiant

A pathway to smarter heating systems.
Greg Cunniff author profile 200x200
Greg Cunniff P.E.
July 11, 2025

As the building industry shifts to electrification, decarbonization, and high-efficiency infrastructure, radiant heating and cooling professionals lead the change. At this year’s AHR Expo in Orlando, FL, Greg Cunniff of Egg Geo presented 'Future of BEST – Net the Energy with Community Thermal Energy Networks'.


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Modern manual laying of tuning water hydronic gas firing conduit supply on metal mesh insulation indoor new house room.
Renewable Heating Design | John Siegenthaler

Ten considerations for selling hydronic systems

John Siegenthaler, P.E.
John Siegenthaler, P.E.
July 7, 2025

While I admit to not being fully informed on the latest things from Google, Apple, Chat GPT, or social media, I’m confident that I can still pass along advice to those who are new to the hydronic industry, especially those involved with designing systems


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Integrate a heat pump with a boiler mounted on a brick wall.
Hydronics Workshop | John Siegenthaler

How to integrate a heat pump with a boiler for dual temperature hydronic heating and cooling

Delivering expectations
John Siegenthaler, P.E.
John Siegenthaler, P.E.
July 2, 2025

A building with slab-on-grade heating from a cast iron boiler plans to expand. A monobloc air-to-water heat pump will provide heating and cooling for the new space via a fan-coil unit, with the existing boiler serving as backup.


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Buildup inside the iron pumps
Heating Perceptions | Scott Secor

Hidden issues and high bills: troubleshooting radiant heat in a luxury home

A seven-figure renovation leaves a high-end radiant heating system underperforming.
Scott Secor
Scott Secor
June 10, 2025

A plumber recently asked us to inspect a home with issues related to radiant heating. The homeowner, Ronny, runs a company that builds commercial office buildings, and the plumber handles the plumbing work.


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Figure 1 is a sketch of the flow problems of the current plumbing system.
The Glitch & The Fix: May 2025

Hydronic heating glitch solved: Why adding a circulator won't fix primary loop flow issue

Cut & cap
John Siegenthaler, P.E.
John Siegenthaler, P.E.
May 8, 2025

When the system was operated, the owner complained of flow problems. The heat emitters in any given zone were only marginally warmed when their associated zone circulator was operating. The owner questioned if another circulator should be installed.


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Underfloor heating installation with drain sewer hole in bathroom close up on water floor heating.
Hydronics Workshop | John Siegenthaler

Using hydronics to leverage time-of-use electrical rates

Buying low
John Siegenthaler, P.E.
John Siegenthaler, P.E.
May 2, 2025

As electrification reshapes the HVAC market, hydronic-based heating and cooling systems stand ready to offer many design and performance benefits. One of them is the potential for thermal storage. After all, water is one of the best materials on earth for storing sensible heat.


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Powerful heat pump for heating and air conditioning of a modern private house installed outside on the side of the house.
Renewable Heating Design | John Siegenthaler

Versatility in direct-to-load systems, part two

Going direct.
John Siegenthaler, P.E.
John Siegenthaler, P.E.
April 8, 2025

Last month, we discussed direct-to-load hydronic heat pump systems. These systems use a variable-speed compressor and circulator to adjust heat output and flow, eliminating the need for a buffer tank or hydraulic separator.




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April 2025 The Glitch & The Fix Figure 1
The Glitch & The Fix: April 2025

Unexpected results: heat pump system at low outdoor temperatures

Consider the “dual temperature” heat pump system shown in figure 1
John Siegenthaler, P.E.
John Siegenthaler, P.E.
April 4, 2025

When only the air handler is operating the heat pump is able to supply the 120 ºF water. However, when the floor heating zone and the air handler are operating at the same time and the outdoor air temperature is below 24 ºF the fluid temperature leaving the heat pump can’t climb above 103 ºF. Why is this happening, and what can be done?


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Precision Under Pressure: Optimizing System Performance Through Balancing and Air Removal

We’ll cover how proper air separation and hydronic balancing help maximize operational efficiency, reduce maintenance and minimize downtime.

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