Technical

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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Electrical Safety

You use electricity every day of your life, so it is easy to take it for granted. Yet electricity is a major cause of injury on the job. This article provides tips on how to work on electrical equipment safely, avoid accidents, and avoid damage to equipment.
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Profiting With Modern Digital Gauges

As an owner-operator, my tools are essential to my work; they can be either a solid contributor or a cause of headaches. On a typical workday, my digital analyzer saves me work time, callbacks, and helps me keep my customers happy.
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2014 World Energy Engineering Congress

Scenes from the 2014 World Energy Engineering Congress in Washington, D.C.

Podcasts

NEWSMakers: Greenheck Mixed Flow Fan, Model EQB

Shane Dock, Application Engineer at Greenheck, will introduce you to Greenheck’s new EQB mixed flow fan. We’ll discuss what the features of the EQB’s innovative design, what kinds of applications can utilize the EQB, and why the EQB is an attractive inline choice for your customers’ projects.  Dock is currently focused on applications regarding inline fans, gravity ventilators, and electrical products. Posted March 4th.

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2015 National Plumbing & HVAC Estimator

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