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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.
By Jerry Boulanger
For The News
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How To Increase Efficiency, Reduce Maintenance, And Improve IAQ With UV
Mold spores are encountered everywhere. When they find the right environment, they’ll multiply to the point of affecting HVAC performance and possibly occupant health. But there is a cost- and energy-efficient way to eliminate mold growth in HVAC systems — ultraviolet (UV) germicidal lamps.
By Lynne Wasner
For The News
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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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System Pumping Efficiency More Important Than Pump Efficiency
It is an accepted fact that pumps are oversized for almost all industrial and commercial installations. The tips here illustrate simple circuit flow analysis techniques to establish methods for flow balance in existing buildings and permit a considerable reduction in pump power requirements.
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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.
By Greg Mazurkiewicz
Of The News Staff
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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.
By Leo A. Meyer
For The News
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Pentagon Activates Solar A/C, Heating, Lighting, Power System
The solar heating, air conditioning, power, and lighting system installed at the guard station of the Pentagon Heating and Refrigeration Plant is one of the most advanced solar energy systems in the U.S. Despite its modest appearance, the system incorporates 12 advanced features.
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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.
By Doug Lockhart
For The News
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Refrigerant Rule Provides Direction For Managing Leak Repairs
With the recent changes in the U.S. Environmental Protection Agency’s (EPA’s) 13-year-old refrigerant regulations, organizations must now really look at how they manage and account for refrigerants because EPA enforcement is now a black and white issue.
By Steven Ehrlich
For The News
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Measuring Temperature And Humidity
The indoor environment technician must measure water temperatures, as well as dry bulb and wet bulb temperatures of air. For example, you may have to measure the entering and leaving temperatures for a coil — both for air and for water. Accurate readings can be critical.
By Leo A. Meyer
For The News
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Why Multiple Boilers Make Sense
Although most systems are designed around one large boiler, when you think about how most heating systems operate, multiple smaller boilers can make a lot of sense.
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Multi-Building Internet Demand-Response System Tested
Researchers at the Lawrence Berkeley National Laboratory (Berkeley Lab) Environmental Energy Technologies Division (EETD) have completed the first successful test of automated demand response in five large buildings.
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Certification Guide Provides Solid Reference
HVACR service technicians, and aspiring technicians, now have a comprehensive guidebook to assist them in gaining various certifications: the HVAC Technician Certification Exam Guide.
By Greg Mazurkiewicz
Of The News Staff
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Forced Air Zoning: Friend Or Foe?
Do you truly understand the advantages that zoning offers not only to customers, but also contractors? This article details the basic concept and benefits of zoning.
By Trey Miller
For The News
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Help Customers Reduce Heating Bills This Winter
There are three overlooked sources of heat loss in the home — the folding attic stair, the fireplace, and the clothes dryer. Here are some tips and techniques to quickly and inexpensively seal and insulate these areas.
By Mark D. Tyrol
For The News
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Operations & Maintenance Focus Lowers Cost, Increases Efficiency
There are numerous measures that may improve fuel-use efficiency and reduce energy consumption — and the accompanying cost. The office of Federal Energy Management Programs offers the tips here for federal facilities, but they are also applicable to commercial facilities as well.
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Protecting Small Hydronic Systems In The Winter
In the fall and winter, Bell & Gossett gets many questions about protecting small residential hydronic heating systems. They cluster around two topics: (1) Adding antifreeze to provide corrosion and freeze protection and (2) Laying up the system before an extended winter vacation.
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Be The Contractor Of Choice: Provide A Quality Installation
A quality installation is an investment that can enhance your customer's comfort while saving them money over the life of their system. The federal government’s Energy Star program provides the recommendations here to show that you are a quality contractor.
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Maximizing Chiller Efficiency
Chillers are the single largest energy-using component in most facilities and can typically consume over 50 percent of the electrical usage. This article details steps that can be taken to help maximize chiller efficiency.
By Don Clark
For The News
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Alternatives For Dehumidification In Commercial Buildings
Controlling humidity in commercial buildings used to be a difficult undertaking. The advent in recent years of alternative dehumidification technologies has made the dehumidification process far more energy efficient and affordable.
By Marc Sandofsky
For The News
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Energy Efficiency Pays
Most energy-efficient homes have dozens of little improvements that individually add little to construction costs, yet together yield big savings.
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Benefits Of Ultrasonic Testing In Determining Pipe Corrosion
While improvements in instrumentation have moved ultrasonic testing technology into more areas, its benefits to facility managers, plant engineers, and technicians as a diagnostic and predictive tool are still widely unknown and underutilized.
By Bill Duncan
For The News
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