95c466b3__And_Cooling___Thermal_Systems__Advantages
[Geothermal Loop Type] Closed-Loop In Series [Disadvantages] Longer flow path requires larger-diameter pipe to minimize pressure drop and maintain pump power at reasonable levels; larger diameter also entails greater antifreeze volumes; system capacity limited by total pressure drop from end to end, so not suitable for large building applications. [Advantages] 
Single pipe diameter entails simpler pipe fusion joints, enabling quicker installation; single flow path enables easier purging to remove air from the loop when filling with water or antifreeze solution.
Geothermal Home Heating And Cooling - Thermal Systems
Advantages