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Engineering Geothermal Heat Pumps
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\\nHeat pumps, which use the outside as a source\\u2014or sink\\u2014for heat, are a familiar environmental control technology in many homes. Kathy Hannun, founder and president of Dandelion Energy, a company that makes household geothermal heat pump systems, discusses the efficiency advantages and engineering challenges of drawing heat from the ground.\\n\\n\\n
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