What types of loops are available?
There are 2 main types of loops: open and closed. An open loop system uses well water as the energy source when it is available in sufficient quantity and quality. Often, the existing domestic water well can be used to provide required energy exchange for a geothermal system. The closed loop alternative uses plastic pipes through which fluid is circulated to exchange temperatures with the earth. Vertical, horizontal or pond loops are used.
There are two main types: open and closed. What is an open loop system? An open loop system uses groundwater from an ordinary well as a heat source. The groundwater is pumped into the heat pump unit where heat is extracted and the water is disposed of in an environmentally safe manner. Because groundwater is a relatively constant temperature year-round, wells are an excellent heat source. How much groundwater does an open loop system require? The water requirement of a specific model is usually expressed in gallons per minute (g.p.m.) and is listed in the unit’s specifications. Generally, the average system will use 1.5 g.p.m. per ton of capacity while operating, but the amount of water required depends on the size of the unit and the manufacturer’s specifications. Your contractor should be able to provide this information. Your well and pump combination should be large enough to supply the water needed by the heat pump in addition to your domestic water requirements. You probably will
