Technical

Using Cloud Technology to Manage Fleets

By Steve Eppinger
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Fleet management can be challenging for HVAC contractors, which often have a number of service vans and trucks with no dedicated staff to oversee them. Fortunately, new Internet-based software programs and tools make it much easier for contractors to access and update records and perform other fleet management tasks.


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Under Floor Ventilation Maintains Comfort for Library Addition

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Patrick Baldwin-McCurdy fields daily indoor air temperature complaints from employees and students; however, Seattle University’s lead buildings control technician rarely hears HVAC complaints from the college’s new library addition featuring under floor air distribution (UFAD).


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Geothermal Helps Show House Dig Deep for Energy Savings

By Greg Mazurkiewicz
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The 2011 Idea Show House, located in the Creekside Village community in Shelby Township, Mich., is a stylish 4,000-square-foot home that features innovative design and green, sustainable living. One of its primary green features is a geothermal heating and cooling system.


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The Advantages of Polypropylene Piping for HVAC Applications

By Steve Clark
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While it’s often viewed as “new” and lumped in with other plastics, polypropylene pipe has in fact been used around the world for nearly 40 years and is highly engineered — offering HVAC application benefits that many other plastics can’t. It also offers several advantages over metal HVAC pipe systems.


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Honeywell Technology Featured in New Sustainability Research Center

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Featuring advanced building controls, sensing technology, and management software from Honeywell, the Centre for Interactive Research on Sustainability (CIRS) will serve as a leading academic hub to test and advance sustainable technologies before broader implementation.


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Tips for the Installation and Use of Backup Generators

Hartford Steam Boiler Offers Information for Safe Use and to Help Prevent Loss
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Consumers and businesses are expected to purchase thousands of backup generators as a result of recent record power outages in the Northeast, but the Hartford Steam Boiler Inspection and Insurance Company (HSB) warns that improper installation can cause fires, property damage, and even serious injury or death.


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More Fans or Fewer: Optimizing VFD Control

By Brian Dolin
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This article compares three schemes of fan control used on large air conditioning and refrigeration condensers. The first scheme is step control; the second is a hybrid with a VFD on only one bank of fans, while the rest remain step controlled. The final, and most efficient, scheme is VFD control of all fans, at all times.


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Fuel Cells Growing in Use in U.S., Especially in CHP Applications

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In a little more than a year, 34 major corporate customers have installed, deployed or purchased more than 250 fuel cell power systems and hundreds of backup power units, totaling more than 30 MW of power. “The Business Case for Fuel Cells 2011: Energizing America’s Top Companies,” profiles this select group of companies.


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Designed to Simplify: Grooved Mechanical Piping Benefits

By David L. Hudson
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Grooved mechanical piping has been changing the way contractors do business for more than 85 years, but this method of pipe joining is still unknown or misunderstood in some areas of the commercial building industry.


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Data Loggers Help Keep Guests Comfortable at Marriott Hotels

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When a plumbing, heating or cooling snafu occurs in one of the 13 Marriott hotels under his supervision, it is John Miller’s job to root out the problem and preserve the comfort of guests.


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