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Pond (Lake) Loops These 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. A 1 acre, 8-foot-deep pond is usually sufficient for the average home. |
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Open loops These use groundwater as a direct energy source. In ideal conditions, an open-loop application can be the most economical type of geothermal system. Discharge water should be sent directly to a second recharge well. |
