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Home » boilers

Articles Tagged with ''boilers''

The Citadel.

U.S. Boiler Company Citadel condensing boilers and volume water heaters

The company has expanded its Citadel line.
January 14, 2026

The line is now available in 7 capacities. 


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The Glitch & The Fix
The Glitch & The Fix: January 2026

The Glitch & The Fix: Geo-normous problems

Pairing a non-modulating geothermal heat pump with a multi-zone, low-mass radiant system introduces several avoidable issues.
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
January 7, 2026

Single-stage non-modulating heat sources in zoned distribution systems often face short cycling, particularly with low thermal mass. When few zones are active, they struggle to dissipate generated heat quickly, causing temperature build-up and potential shutdown of the heat pump based on internal limits, with varied restart behavior depending on controls.


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Old heating system in a basement.
Heating Perceptions | Scott Secor

The hazards of servicing old boilers

From crumbling wiring to failing antique controls, the cost and liability of servicing decades-old heating systems often outweigh the benefits.
Scott Secor
Scott Secor
December 19, 2025

Today, we still get calls about older systems. The potential customers often think their house or building is the oldest we have ever seen. I suppose people think every other building on their block has removed the old steam or hot water system and replaced it with something more modern.


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The Sussman Electric Boilers EWx Series electric hot water boiler.

Sussman Electric Boilers EWx Series electric hot water boiler

The line will now feature new models in compact sizes.
December 18, 2025

Sussman Electric Boilers announced the expansion of its EWx Series Electric Hot Water Boiler lineup with new models ranging from 30 kW to 240 kW. 


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Figure 1 with a figure 2 overlay

The Glitch & The Fix: Zone 3 failure

Can you figure out why this boiler circulator failed?
John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
December 16, 2025

Can you speculate why heat delivery in zone 3 was insufficient before the helper pump? How could the piping system be improved, considering the wasted length of PEX-AL-PEX tubing from the manifolds to the floor panels in figure 2?


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Industrial pressure gauge on a tank.
Heating Perceptions | Scott Secor

From cutting edge to classic: How to modernize outdated pneumatic control systems

A look at how a once state-of-the-art pneumatic control system has aged, and what it takes to modernize it.
Scott Secor
Scott Secor
November 21, 2025

On this job, I was reminded of how this “cutting edge” system that was installed fifty years ago is now considered "old school."


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The Wint logo.

Wint introduces AI-powered water temperature analysis

This new capability aims to aid in identifying boiler issues and reducing energy waste.
November 20, 2025

Monitoring temperature marks a step forward in intelligent water management for energy-conscious facilities.


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The Ariston Canada building.

Official name of NTI Boilers changes to Ariston Canada

Ariston Group has announced that NTI Boilers’ legal name has officially changed to Ariston Canada.
November 5, 2025

While the legal name change reflects alignment with Ariston’s global operations, the NTI brand will remain unchanged in the North American market.


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The Glitch & The Fix
The Glitch & The Fix: November 2025

Overlooped: Boiler swap gone wrong

John Siegenthaler 200x200 author headshot on a white background.
John Siegenthaler, P.E.
November 4, 2025

An owner, who has never been satisfied with the performance of his heating system, decides that the boiler must be the root cause of all the performance issues. Not wanting to spend any more than necessary, he makes several calls looking for the lowest boiler replacement price.


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The ribbon-cutting at the Condensing Center of Excellence in Lancaster.

U.S. Boiler Company unveils Condensing Center of Excellence expansion

The Condensing Center of Excellence is located in Lancaster, PA.
October 30, 2025

The Condensing Center of Excellence is dedicated to the production of the company's most advanced technology. 


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