Open Loop - commonly referred to as "Pump & Dump" systems, open loops use water from an underground aquifer as the source of energy. The installation cost is typically the lowest with open loop systems, as there is no need for piping (horizontal or vertical loops) to be installed in the earth. In certain conditions, open loop system are the most efficient means of geothermal heating, since they take the heat energy directly from the earth with no tubing or piping in between.  Most areas will require a CurpoNickel heat exchanger and filters to prevent sediment from entering and potentially damaging the heat pump.

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