HVAC Light Commercial Market

Nordyne: Packaged Heat Pumps, Gas Packs

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Two NuTone packaged systems — heat pumps and packaged gas/electric models — include all-aluminum microchannel coils for lighter weight, smaller size, better durability, and greater reliability in corrosive environments, said the company.


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Contractors Offer VRF Advice

By Cherie Preville
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Various areas of the U.S. HVACR industry are considering variable refrigerant flow (VRF) technology these days. What are contractors saying about it?


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Trane, a brand of Ingersoll Rand: Unitary Rooftop Systems

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The IntelliPak™ I unitary rooftop systems in configurations from 20 to 130 tons are available. The redesigned system is a packaged rooftop unit that has energy efficiency ratings (EER) of 11; some IntelliPak I configurations exceed the EER of 11 and achieve as high as 14.2.


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GreenSTAR Contractors Lead the Way

By Herb Woerpel
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As the green movement continues its forward momentum, numerous contractors are well ahead of the learning curve, thanks to a comprehensive qualification program, courtesy of the Mechanical Service Contractors of America. What is the association’s latest offering?


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The Professor: Superheat

By John Tomczyk
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Superheat is probably the most talked about yet misunderstood technical term used by service technicians in the field. Superheat is a measured value. What can be done with it?


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Manufacturers Go Green at Greenbuild

By Herb Woerpel
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A number of manufacturers are greening their product offerings. Several of these manufacturers will be attending Greenbuild 2012. What will they bring to the show?


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Ice Breaker: Troubleshooting Controller Inputs

By Joe Marchese
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Today more and more systems are incorporating microprocessor controllers into their design. Troubleshooting the operation of these controllers can be a little tricky at times, but if broken down into sections it can be easier to handle.


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Greenbuild Invades San Francisco

By Herb Woerpel
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The U.S. Green Building Council’s (USGBC) 11th annual Greenbuild International Conference and Expo will take place Nov. 14-16 in San Francisco. What can be expected?


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Eco Hybrid Solar LLC: Hybrid Water Heating System

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A second-generation hybrid solar water heating system, the ecoMax° integrates waste heat recovery, along with solar thermal, to produce free hot water for domestic and light commercial use. The controller means HVAC technicians can now tap into a second free heat source: waste heat recovery from a/c and refrigeration units.


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Johnson Controls: Dual-Fuel Heat Pump

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The Luxaire® brand Acclimate™ packaged 2- to 5-ton dual-fuel heat pump features low nitrogen oxide (NOx) for reduced carbon emissions, R-410A refrigerant, standard louvered condenser coil protection, and easy power and control wiring connections for reduced installation time and costs.


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