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How geothermal energy works

The Ground

A geothermal system uses the energy of the sun, stored in the earth, to keep you in comfort all year round. Even in the winter, when a blanket of snow covers the ground, the earth’s temperature remains approximately 10°C (50°F) at only six feet below the surface. This means that you have a steady supply of heat to keep you in comfort, even in the depths of the coldest winter.

The Pipes

A series of pipes buried in the ground. An ethanol solution is circulated through the pipes to make them highly efficient conductors of heat. In the winter, the ethanol in the pipes absorbs the heat from the ground and, now warmed up, the fluid is pumped back through the geothermal unit in the house. In the summer, the heat transfer process takes place in reverse. The fluid in the pipes leaves the house in a warm state, but after circulating underground, is cooled as the pipes exchange heat with the cooler earth.

The Geothermal Unit

The underground loops connect to the main geothermal unit installed in your house, and is connected to your home’s forced air (or water radiator) system. Compatible with your home’s distribution system: See options to the left for details on NextEnergy geothermal systems.

Forced Air

As our top performer, the Tranquility 27™ forced-air heat pump delivers the highest efficiency ratings in the industry. Self regulating two stage technology allows the Tranquility 27™ to operate at the most efficient speed for all weather conditions. Equipped with an electronic variable speed fan motor (ICM2), the Tranquility 27™ controls system air flow to assure high operating efficiency and superior dehumidification.

Water to Water

NextEnergy’s new Tranquility THW™ water-to-water R410A high temperature heat pump provides high temperature output (140°F), internal controls, and factory-installed options. The Tranquility THW™ includes a special high temperature scroll compressor coupled with heat exchangers designed specifically for water heating, which results in unmatched efficiencies and performance.


Designed for use in heating or cooling applications requiring high efficiency performance, the Genesis GSW is the perfect selection. Commonly used residential applications that require energy efficient water to water heat transfer, the Genesis GSW can be used to pre-heat or cool make-up air or can be installed as a stand-alone boiler / chiller in most hydronic heating applications such as radiant floors and fan coil heating / cooling.

via Geo Dynamics Next Energy.


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