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BeGreenNow's LEED Credit Calculator


This online tool from Green Mountain Energy allows businesses to calculate the number of RECs required to meet the Green Power LEED certification standard for the four primary LEED certification types. Learn more about the calculator on GreenerBuildings.com

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Sustainable Energy Design Tools

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Sustainable By Design provides the following suite of shareware tools to aid with solar design and building-energy analysis:
  • SunAngle determines the position of the sun at any time of day at any location on Earth.
  • SunPosition calculates sun angles over the course of a year.
  • SunPath produces graphic representations of the sun's course through the sky.
  • Overhang Design analyzes the performance of simple window overhangs.
  • Window Heat Gain calculates the solar-thermal gain through windows.
  • CFL Economics compares the lifetime operating costs of compact fluorescent lamps and incandescent lamps.
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