How much groundwater does an open-loop system need?
A geothermal heat pump using an open-loop system needs a different amount of water depending on the size of the unit and the manufacturer’s specifications. The water requirement of a specific model is usually expressed in gallons per minute and is listed in the specifications for that unit. Your heating contractor should be able to provide this information. Generally, the average system will use 6 to 10 gpm while operating. This selection process should include a discussion with a licensed well driller and geologist to determine if sufficient groundwater resources are available for your project need. In addition, open loop systems may require both a pumping well and a recharge/discharge well. The production well could be your domestic water well, but it is critical that the well capacity, pump size, piping, and plumbing are enlarged to handle the additional flow.
Geothermal heat pumps used in open-loop systems need differing amounts of water depending on the size of the unit and the manufacturer’s specifications. The water requirement of a specific model is usually expressed in gallons per minute (g.p.m.) and is listed in the specifications for that unit. Your water well and heat pump combination should be large enough to supply the water needed by the heat pump in addition to your domestic water requirements.
Geothermal heat pumps used in open-loop systems need differing amounts of water depending on the size of the unit and the manufacturer’s specifications. The water requirement of a specific model is usually expressed in gallons per minute (gpm) and is listed in the specifications for that unit. Your heating con-tractor should be able to provide this information. Generally, the average system will use 6-10 gpm while operating.
Geothermal heat pumps used in open-loop systems need differing amounts of water depending on the size of the unit and the manufacturer’s specifications. The water requirement of a specific model is usually expressed in gallons per minute (g.p.m.) and is listed in the specifications for that unit. Your heating contractor should be able to provide this information. Generally, the average system will use ~10 g.p.m. while operating.
