Boilers & Hydronics

The Challenges of Early 20th Century High-Rise Steam-Heating Systems

By Dan Holohan
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This system is the missing link between one- and two-pipe steam. It was used in tall buildings in the early 1900s because a building this tall wouldn’t work well with one-pipe steam if the supply came up from the basement. 


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Zurn Industries LLC: Radiant Floor Piping

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A radiant floor heating solution leveraging Polyethylene of Raised Temperature Resistance (PE-RT) technology from The Dow Chemical Company (Dow) is the hy-PE-RTube™.


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Future-Proofing Hydronic Systems

Low Water Temperatures are the Key
By John Siegenthaler, PE
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A tradeoff has always existed between the water temperature at which hydronic heat emitters are sized and their cost. The higher the supply water temperature assumed by the designer, the smaller the required heat emitters and the lower their installed cost. 


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Gasmaster Industries Inc.: Dual-Fuel Condensing Boilers

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Two dual-fuel natural gas/propane and No. 2 fuel oil condensing boilers — GMI-8M-DF and GMI-4M-DF — have been added to the company’s condensing boiler lineup. The boilers can run either natural gas or propane as the main fuel with No. 2 fuel oil as the backup.


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Bryan Steam LLC: Hot-Water Condensing Boilers

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Ultra-high efficiency, the Triple-Flex™ Series of hot-water condensing boilers deliver a minimum 90 percent operating efficiency with 160°F return and 180° supply at maximum input. 


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Boiler Provides Savings and Sustainability

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The University of Missouri (MU) in Columbia, Mo. is being commended for its commitment to energy reduction and sustainability through the installation of a new biomass boiler. 


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Taco Inc.: Hydronic Differential Pressure Sensor

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A differential pressure sensor has been added to the company’s line of hydronic system components. 


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Lochinvar LLC: Solar Thermal Storage Tank

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Designed to offer a solution for solar thermal and ground-source applications with an emphasis on hydronic space heating, the multifunctional Thermal-Stor™ stratified solar thermal storage tank operates as a storage tank and hydronic buffer tank while occupying the space of a single unit. 


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Putting the Fish in Efficiency

By Dan Holohan
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High efficiency comes with a price that’s higher than normal efficiency (whatever that is), and because of that higher price, high efficiency is now a subjective term that is open to broad interpretation, and perhaps even reinvention. 


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Hydronics Trends: Whole-System Comfort

By Angela D. Harris
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The application of wet heat technology has expanded over the years and new technologies that improve control and efficiencies are pushing this industry sector further ahead. 


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Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

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NEWSMakers: Jeremy Begley

Jeremy Begley, home-performance specialist and Web and social media manager with National Heating and Air Conditioning Co. in Cincinnati discusses how and why you should add home-performance philosophies to your contracting repertoire. Posted on Sept. 12.

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