What is geothermal and how does it work?
A geo exchange heat pump uses the earth's geothermal heat to keep the building comfortable year-round. In the winter, it transfers usable heat from the ground or groundwater into the building. In the summer, it cools the building by reversing the process.
For more information, please visit Iowa Geothermal.

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1. How many of your buildings use geothermal for its heating and cooling?
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4. What is geothermal and how does it work?