thanks for your clarification. You are obviously right. We tried to make the video as easy to find as possible. Since the wording "geothermal" is commonly more used, we went for that title.

It uses the constant temperature under the ground for heating and cooling. Your definition of what geothermal is too narrow.

@@loveyourtie Definitions are useless when they are to wide, than one has to use whole sentences to describe something, instead of using one word, to explain what one means. If you want to use the more sexy geothermal instead of the correct ground based, than at least add shallow to geothermal. When I started out geothermal was only used to describe the power resulting from the heat radiating from the earth core. Ground based system were not widely used. Now people seem to use geothermal wider and it does not any longer describe a certain thing exactly. It is especially frustrating as there is a good and useful word for what you use, ground based.

Thank you very much for your questions. Here with your measures: - 35 bar = 508 PSI - 220 metres = 722 feet (8'661 inches)

@@heizungsmacher Thank you