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The basics

There are 4 basic methods how Geothermal or Ground Source Energy Systems tap into this alternative source of energy: 3 systems use a closed loop and one an open loop system.

Closed loop systems circulate a water-based solution through a "loop" of small diameter, underground pipes. In cold weather this solution absorbs heat from the Earth and carries it to the geothermal unit, where the heat is amplified and delivered throughout your house. In warm weather the process is reversed - excess heat is carried from your home and deposited into the Earth, keeping you refreshingly cool during the hottest summer.

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Horizontal Loop

Horizontal Loop

Horizontal Loops are often considered when adequate land surface is available. Pipes are placed in trenches, in lengths that range from 100 to 400 feet.

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Vertical Loop

Vertical Loop

Vertical Loops are the ideal choice when available land surface is limited. Drilling equipment is used to bore small-diameter holes from 75 to 300 feet deep.

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Pond Loop

Pond Loop

Pond (Lake) Loops are very economical to install when a body of water is available, because excavation costs are virtually eliminated. Coils of pipe are simply placed on the bottom of the pond or lake.

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Open Loop

Open Loop

Open Loop systems utilize ground water as a direct energy source. In ideal conditions, an open loop application can be the most economical type of geothermal system.

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