The manufacturers of ground source heat pumps use the term 'geothermal' in English: https://www.waterfurnace.com/residential/products/geothermal-heat-pumps/h ht

The manufacturers of ground source heat pumps use the term 'geothermal' in English: https://www.waterfurnace.com/residential/products/geothermal-heat-pumps/h https://www.waterfurnace.com/residential/products/geothermal... https://enertechusa.com/geothermal-product-catalog/ https://enertechusa.com/geothermal-product-catalog/ - the term is confusing though