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Home » hydronics

Articles Tagged with ''hydronics''

Insulated Pipes for Industrial HVAC Installation.
Renewable Heating Design | John Siegenthaler

When one heat pump isn’t enough

Part one.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
January 7, 2025

Air-to-water heat pumps, especially for larger systems, can be used in stages for efficient temperature control and flexibility, utilizing variable-speed compressors and specific piping setups to manage heating and cooling loads.


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Figure 2
The Glitch & The Fix

How would you fix this oil-fired boiler system?

December 23, 2024

The first photo shows an oil-fired boiler and surrounding details. Take a close look, and make a list of what you would change in this portion of the system.


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Illustration of Thermal Energy Networks (TENs)
Radiant Comfort Report Winter 2024 Edition

A new generation of Thermal Energy Networks

TEN allows for both cooling or warming to be applied to decarbonization efforts.
Rick Bostian
Rick Bostian
December 18, 2024

The 2024 Uniform Mechanical Code's Chapter 17 introduces Thermal Energy Networks (TEN), enabling buildings to independently manage heating and cooling sustainably, reducing environmental impact and enhancing energy efficiency across communities.


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True North Mechanical Ottawa Pool and Clubhouse
Radiant Comfort Report Winter 2024 Edition

Making a splash in winter with radiant heat

Mechanical contractor leverages radiant and snow-melt system inside and outside luxury pool house for year-round enjoyment.
Brooke Roberts
December 11, 2024

In Ottawa, a homeowner's dream of a luxury clubhouse with an outdoor pool comes to life with True North Mechanical's innovative heating system, ensuring a perfect New Year’s Eve party despite the freezing temperatures.


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Hydrant Fuel Pump Station
Renewable Heating Design | John Siegenthaler

An expensive lesson in hydronic fundamentals

What was, what is, and what could have been.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
December 5, 2024

A review of a flawed hydronic heating system uncovers critical errors, such as improper circulator placement and restrictive mixing valves, leading to uneven warmth and corrosion issues. This underscores the need for proper design and installation in hydronic systems.


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Boiler plumbing for a large apartment building.
Heating Perceptions | Scott Secor

In hot water: A DHW logistical predicament

A local hotel’s domestic hot water system repairs calls for creative problem-solving.
Scott Secor
Scott Secor
December 5, 2024

A hotel’s aging hot water system faces upgrades as leaking tanks are set to be replaced with smaller units. While a full redesign is desired for efficiency, budget constraints may limit the project scope, causing temporary hot water disruptions.


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Figure 1. The inside portion of a heating system supplied by a non-pressurized outdoor wood-fired furnace.
The Glitch & The Fix

Installation nightmare — how many problems can you spot?

November 27, 2024

The photo in Figure 1 shows a non-pressurized outdoor wood-fired furnace connected to a floor heating subsystem via two PEX tubes. It includes a cast iron circulator, a thermostatic 3-way valve for mixing, a bypass linking supply and return tubes, and an "expansion zone" for another floor heating circuit. This setup is in a multi-million dollar home. Are there any potential issues with the installation?


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IAPMO.gif

IAPMO seeks USHGC Task Group Members

November 7, 2024

The deadline to apply is Dec. 6.


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

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

John Siegenthaler 200x200 author headshot on a white background.
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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