Ground source heating: where does the heat come from and when is it worth considering?

In domestic projects, geothermal heating often means a heat pump system that uses heat from the ground. Heat is collected by a properly designed ground loop and transferred to the building's heating system. The system still uses electricity; the ground is not an independent free boiler. ^S10

Consider not only the unit but also plot conditions, the heat collection loop, installation work and the indoor heating system. The ground differs from outdoor air as a heat source, but the final result still depends on correct selection and system operation. ^S13

The quotation should clearly separate the heat pump, ground loop and other work. Proposals using the same pump model can include very different solutions. Drilling feasibility and applicable requirements are assessed for the specific property, not promised from an advert.

Some systems can include passive cooling. However, this is not automatically installed in every ground source unit; a special model or additional module may be needed. ^S14

Before ordering: provide details of the house and plot, planned heating and summer comfort needs. Ask for the scope of the entire system, not just the heat pump price.