Boilers & Hydronics

New Boilers Heat Up Market

Manufacturers Include Technologies that Increase Efficiency and Ease of Use
By Joanna R. Turpin
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Technologies used in commercial hot water boilers are evolving rapidly, resulting in new equipment that is more efficient and easier to operate than ever before. Modulating burners, variable-speed drives, and advanced controls can now be found on many newer boilers.


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Homeowners Warm Up to New Equipment

2013 Residential Heating Showcase Features Newest Products
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It’s time again for the annual Residential Heating Showcase. The intent is to help contractors prepare for this busy period by doing the research that will help them distinguish between brands.


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Avoiding Thermal Depression

A New Way to Protect a Heating System
By John Siegenthaler, PE
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A cool concrete slab is like a black hole for Btus. It gobbles up any heat that dares to get close. The solution is to install a mixing assembly operated by a controller that measures the boiler’s inlet temperature, as well as the water temperature supplied to the distribution system.


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Bosch Thermotechnology: Tankless Water Heaters

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For commercial applications, the Therm C 1210 ESC tankless water heater provides up to 98 percent thermal efficiency. 


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Eclipse Magnetics: Commercial Heating System Filter

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Potentially damaging ferrous oxide from heating systems is removed by the BoilerMag XL, a high-performance, easy-clean filter for commercial premises. 


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A History of Steam Pressure Relief Valves

Who Truly Gets Credit for the Invention of the Steam Pressure Relief Valve?
By Dan Holohan
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In 1905, a boiler in a Boston shoe factory blew up, traveled a great distance through the air, and landed, with delightful justice, in the front yard of the operating engineer’s house. Think it got his attention?


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Energy and Power Are not the Same Thing

True Professionals Use Clear Definitions and the Proper Terminology
By John Siegenthaler, PE
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When it comes to the difference between energy and power, our industry tends to get sloppy with its terminology. 


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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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2014 Energy Efficiency Forum

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

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NEWSMakers: Joseph Groh

Joseph Groh, an industry veteran boasting 35 years of HVAC experience, discusses the 2008 bicycle accident that cut his career tragically short, and how the Joseph S. Groh Foundation is his way of giving back to the construction trade. Posted on Aug. 22.

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2014 August 25

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Prohibiting HFCs

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2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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