When I started my career 17 years ago, only a few geothermal-unit configurations were available, and those met most industry needs. With the inception of the LEED (Leadership in Energy and Environmental Design) green-building rating program and stricter ANSI/ASHRAE/IES Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, and ANSI/ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, requirements, the geothermal industry has evolved. This article ...

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