Boilers & Hydronics

Expansion Tank Pressurization

Improper Air-side Pressurization ‘Wastes’ some of the Internal Volume
By John Siegenthaler, PE
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Having the proper air-side pre-pressurization prevents system water from entering the expansion tank, until the water begins expanding due to heating. 


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Bosch Thermotechnology: Residential Gas-fired Boiler

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Bosch has replaced its Buderus GC124 residential gas-fired boiler with the new precision cast GC144 boiler, a compact Energy Star-compliant boiler capable of delivering best-in-class 85 percent AFUE. 


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Lochinvar LLC: Fire Tube Boiler

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The FTXL™ Fire Tube Boiler for light commercial applications comes in five models ranging from 399,999-850,000 Btuh. 


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HVAC Residential Equipment: Efficiency, Installation Ease Grab Awards

Rheem Professional Prestige™ Hybrid Electric Heat Pump Water Heater Wins Gold
By Angela D. Harris
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The NEWS honors the 2014 Dealer Design Award winners in the HVAC residential equipment category.


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HVAC Commercial Equipment: Winners Invest in Design

Mitsubishi Electric Cooling and Heating Earns Gold
By Angela D. Harris
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The NEWS honors the 2014 Dealer Design Award winners in the HVAC Commercial Equipment category.


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HVAC Training Track: July 21, 2014

Hydronic-based Biomass Heating Systems
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This new, self-paced, online course covers the unique operating characteristics of several wood-fired boilers and goes on to show several examples of complete systems for both residential and commercial/institutional applications. 


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Blame the Kids: The Cause of Your Mechanical Malfunctions

Kids do the Darndest Things, Don’t They?
By Dan Holohan
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It took six firefighters to get the kid out of the duct, and Mama got older. Much older.


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Bosch Thermotechnology: Commercial Boiler Control

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The Heatronic 4000 commercial boiler control can activate up to four boilers utilizing outdoor temperature reset, space heating set point, and domestic hot water set point or communication received via BACnet and Modbus. 


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The Fulton Cos.: Condensing Boilers

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The Endura™ boiler is now available in 750,000 (EDR-750) and 1 million (EDR-1000) Btuh model sizes. 


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UK Considers Organic Rankine Cycle

Brunel University Researchers Ponder Country’s Energy Capacity Concerns
By Julian Milnes
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Energy that is recovered can be used in another part of the process or can be converted to “high value” electrical power. A technology that can achieve the latter is the Organic Rankine Cycle (ORC).


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2014 Energy Efficiency Forum

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

Podcasts

NEWSMakers: Mark Satterfield

Mark Satterfield, founder and CEO of Gentle Rain Marketing Inc. and author of “The One Week Marketing Plan” talks about his book and the importance of HVAC blogging. Posted on Sept. 19.

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NEWS 09-22-14 cover

2014 September 22

Check out the weekly edition of The NEWS today!

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Venting R-22

The NEWS reported that a man received prison time for venting R-22. Should EPA step up enforcement?
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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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