The cost of installing geothermal HVAC system is determined by the size of the house. In case of smaller homes, the price could be between $12,000 and 22,000 and medium-sized homes cost between 18,000 and 35,000. The bigger homes can cost between $28,000 and 50,000 or more owing to the increased energy requirements and larger ground loop systems. Insulation quality and climate conditions also determine the total cost as they may influence system requirements and complexity of installation.
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