Are there advantages of an open-loop system over a closed-loop system?
AOpen-loop units usually are less expensive to install (no need for trenching or drilling) and are more efficient (the heat in the supply water is transferred without the need for antifreeze). Closed-loop units offer more security of supply (less chance of constriction of the water supply) and have no environmental impact. Often, loops operate at a lower cost than open systems due to lower pumping power required.
