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Date: 2013-12-05 17:49:29Building engineering Heating ventilating and air conditioning Geothermal energy Heating Geothermal heat pump Geothermal heating Geothermal electricity Water heating HVAC Energy Technology Heat pumps | Calpine Geothermal Visitor Center, Middletown, CaliforniaDocument is deleted from original location. Download Document from Web Archive |