How do we access it ?

Accessing the subsurface energy requires drilling or trenching to reach the resource. Piping is then used to transport fluid bring heat (or cool) to the surface. These ground loops can be open or closed depending on the available resource.

Closed loop systems operate by circulating a fluid through a sealed pipe network, collecting and discharging heat as it circulates. Open loops systems operate by extracting fluid directly from the subsurface resource and – in the case of all the calculator results – return the water with a reinjection well. The table below summarises different ground loop designs.