Whats a closed loop system?
The term “closed loop” is used to describe a geothermal heat pump system that uses a continuous loop of special buried plastic pipe as a heat exchanger. The pipe is connected to the indoor heat pump to form a sealed, underground loop through which an antifreeze solution is circulated. Unlike an open-loop system that consumes water from a well or open water source, a closed-loop system recirculates its heat-transferring solution in pressurised pipe. A closed-loop system can be installed ((horizontally)) (trench system) or ((vertically)) (borehole).
