Technical

Chilled Beams: What They Are, Why You Should Use Them

By Thomas Gibson and Mindy Espinosa
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A chilled beam is an air distribution device with an integral coil that may be installed within a space in order to provide sensible cooling and heating. There are two main types of chilled beams: active and passive.


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Service Manager Course Leads to New HVAC Service Shop

Rick Martinez Opened Home Environment Solutions LLC on March 1
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Husband and wife team Rick and Kelly Martinez had been kicking around the idea of opening their own HVAC service shop for a few years but could never gather enough information to feel comfortable making the leap. The International Training Institute’s (ITI) Service Manager Course, however, made the difference.


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Seasonal Start-ups: They're Not as Simple as You Think

By Thomas Brown
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The cooling season is upon us. Are your customers’ commercial HVAC systems up to the task? Now’s the time to conduct a seasonal start-up, to make sure you’re able to provide reliable, efficient cooling throughout the warmest months of the year.


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Polypropylene Pipe Helps Ease Elementary School’s Transition to Geothermal

School District Leverages Grant Money to Upgrade Heating System
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The Park Orchard Elementary retrofit included replacing classroom heating systems. The Kent School District was awarded a $1 million-plus grant from the Office of the Superintendent of Public Instruction for project design enhancements including the installation of a ground-source heat pump system.


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How to Bid and Win Air Sealing Jobs

By Kristen Lewis
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For HVAC contractors looking to increase sales, weatherization services like air sealing can be a natural extension of their businesses, offering many professionals a way to boost profits and reduce outsourcing. Bidding an air sealing job, however, can be an intimidating process. Here are a few easy steps to simplify the bidding process.


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Mohegan Sun Improves IAQ While Saving Energy

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One aspect of Mohegan Sun’s green initiatives is to improve energy efficiency. The challenge is to find ways to maximize efficiency without sacrificing indoor environmental quality. One way that Mohegan Sun achieves this balance is by implementing a ventilation solution known as demand controlled ventilation or DCV.


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Energy Efficiency, Geothermal Heat Pumps, and ‘Negawatts’

The Lowest Cost Unit of Energy Is One That Is Not Used
By Douglas A. Dougherty
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A recent study by Ceres — “Practicing Risk-Aware Electricity Regulation: What Every State Regulator Needs to Know” — concluded that the least cost and least risk for future energy resources is energy efficiency. Indeed, the lowest cost unit of energy is one that is not used.


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The Need for Bearing Protection for Inverter-Duty Motors

By Adam Willwerth
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All major manufacturers of three-phase ac induction motors offer “inverter-duty” or “inverter-ready” models, but while these motors have inverter-rated insulation to protect the windings, the bearings — their most vulnerable parts — are too often ignored. 


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Consultant Offers Top 10 Green Building Trends for 2013

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Leading green building and sustainability consultant Jerry Yudelson has released his annual list of “Top 10 Megatrends” for the green building industry. Yudelson said, “It looks like a good year ahead for the green building industry.”


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Increasing the Lifespan and Reliability of Electrical Components

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Heat is both a byproduct and one of the greatest enemies of electrical and electronic components. If not dissipated, this heat has the potential to cause early failures and malfunctions.


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