95c466b3__And_Cooling___Thermal_Systems__Advantages
[Geothermal Loop Type] Direct-Exchange Loop [Disadvantages] Soil in contact with ground loop subject to freezing; copper tubing should not be buried near large trees where growing root system could damage the coil; ground-loop leaks can lead to catastrophic loss of refrigerant; smaller supporting infrastructure in GHP industry, with greater care and higher skill needed to install and consequently higher installation costs. [Advantages] 
Higher thermal efficiency; no liquid/liquid heat exchangers required; less land area needed for horizontal configuration.
Geothermal Home Heating And Cooling - Thermal Systems
Advantages