Technical

Pressurization Of Closed Hydronic Systems

Most modern hydronic heating and/or cooling systems are closed systems that must be maintained at some minimum pressure. This would seem to be a simple concept, but it is surprising how often a lack of attention to the basics can cause all kinds of problems.
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Motor Tips: Overload And Speed Change

This article provides tips on how to tell when a motor is overloaded and what can be done with a new replacement direct-drive fan or blower motor when little or no speed change can be detected from one connection to the next.
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Minimizing System Effect

System effect is the negative impact on fan performance that results when the fan is connected to a duct system. This article explains system effect, what causes it, and how to overcome it.
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Energy Efficiency: The Real Thing

The Alliance to Save Energy's recent "Great Energy Efficiency Debate" in Washington included a lone HVAC representative - James Wolf of Trane. Wolf agreed to talk with The News about his panel's discussion and comment further on the issues raised.
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2015 ACCA Conference

Images from the 2015 ACCA Conference in Grapevine, Texas. Posted on April 8, 2015.

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NEWSMakers: Mark Crockett
Mark Crockett vice president, Crockett Facilities Services, explains the importance of technician training, the value of being a top minority-owned company in the U.S., current projects the company is managing, and much more. Posted on April 24.
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2015 National Plumbing & HVAC Estimator

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