Field Modifying Fittings and Duct

Field modifying fittings and duct can save time and money. If you install residential ductwork on a performance basis (X number of dollars for the job) as I do, it is sometimes a real benefit. You have to know how fittings are made before you can alter them.
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How an Open Building Automation System Cuts Costs, Increases Flexibility

Having a specification that allows for any system option and protocol leads to a more complex system, one that is more cumbersome to install, commission, and maintain. It is recommended to pick one common protocol for the entire building control system infrastructure. Costs go down and maintainability goes up.
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The Key Role of Retrocommissioning in Building Sustainability

The concept of sustainability has gained interest in direct proportion to the recent increases in energy costs. There is a frequently overlooked initiative that can have the most significant impact on reducing energy usage in buildings and can set the stage for future efficiency initiatives: retrocommissioning.
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Whole Building Design

Designing, constructing, or renovating high-performance buildings requires a whole building approach. This differs from the traditional design/build process, as the design team examines the integration of all building components and systems and determines how they best work together to save energy and reduce environmental impact.
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Improving School Environment and Performance

Green school programs are touted mainly for saving energy, but research at the Georgia Tech Research Institute (GTRI) indicates that bettering a school’s indoor environment also increases health and comfort, which in turn promotes increased attendance, student attentiveness, and teaching effectiveness.
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EPA Offers Tips on Proper Use of Programmable Thermostats

The U.S. Environmental Protection Agency (EPA) has launched an effort to help Americans save on their summer cooling bills with advice on how to properly program their thermostat. HVAC contractors can pass along these tips to customers to help them stay cool while keeping more cash in their pockets.
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Air Filtration and Energy Efficiency

The energy used by HVAC systems is based on the resistance of the air passing through the filter; the lower the filter’s resistance, the lower the energy consumption will be. However, even though one speaks of filters, it is really the filter media that has the biggest effect on minimizing energy consumption.
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Extending a Motor's Operating Life

The operating environment, conditions of use (or misuse), and quality of preventive maintenance determine how quickly motor parts degrade. The best safeguard against thermal damage is avoiding conditions that contribute to overheating. Bearing failures account for nearly one-half of all motor failures.
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Aluminum Evaporators for Ammonia

Air-cooling evaporators used in ammonia systems have traditionally been made using galvanized (zinc-coated) carbon steel. There are other metals that are compatible with ammonia, including stainless steel and aluminum. Aluminum, in fact, can provide several benefits.
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The Impact of Air Duct Leakage

Air duct leakage should be a concern to both the designer and the building owner because of its potential impact on initial construction costs, energy usage, and system performance. No matter the size, the total benefit of the duct system is based and measured on the peak fan efficiency for that system.
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2014 World Energy Engineering Congress

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


NEWSMakers: Matt Barga

Matt Barga, portfolio manager — a/c and coils, Ingersoll Rand, discusses how the company is working to comply with the new energy conservation standards for heat pumps and air conditioners that go into effect on Jan. 1, 2015. Posted on Dec. 19.

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2014 December 15

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2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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