Geothermal conditioning is use of the earth’s thermal energy and storage capacity for heating, cooling, and ventilation. These types of conditioning strategies can transfer heat to the indoor environment using the ground, groundwater, or surface water – resources that are abundant and ubiquitous – to satisfy some or all of the heating load. They can also capitalize on the heat capacity and thermal inertia of the earth and its waters by transferring excess heat from indoors to outdoors, providing cooling with substantially reduced energy consumption from conventional cooling and negligible thermal impact on the outdoor environment.