Geothermal systems use the earth as a heat source and heat sink. In order to transfer heat to or from the house heat exchangers (ground loops) are installed in the ground. These consist of high density polyethylene plastic pipes. The loops are then connected to the heat pump and fluid circulated between them transferring the heat between the heat pump and the earth.
Pond/Lake Loop System
This type of design is economical when a project is located near a body of water. Fluid circulates through polyethylene piping in a closed system, just as it does through ground loops but in this case underwater. The pipes may be coiled in a slinky to fit more surfaces into a given amount of space. The lake needs to be a minimum size and depth depending on the load. Lake loops have no adverse impact on the aquatic system.
