Ground Source or Water Source Geothermal
There are two primary types of geothermal options: ground source or water source. The components in your home are the same for either source; the chief difference is how and where the exchange mechanism is located. A ground source heat exchanger is buried in your yard, vertically or horizontally depending on the available space. Refrigerant is passed through the system, and it’s the expansion and contraction of the refrigerant that cools your home. The warm air from your home is transferred into the ground. In other climates, this process can be reversed to heat your home in the winter months and cool it in the summer. While this isn’t necessary in the Cayman Islands, some of the heat energy can be used to heat your home hot water, pool, hot tubs, or radiant in-floor heating.
A water source heat exchanger performs the same function, but instead of being buried in your yard, the cooling loop is located underwater, either in the ocean or a pond, lake, or in some cases, a well.