The article covers two different things. There's something called Dandelion’s that goes 150 meters down for heat pump purposes. And then there's something else

The article covers two different things. There's something called Dandelion’s that goes 150 meters down for heat pump purposes. And then there's something else that goes 7 kilometers down for geothermal energy purposes. The geothermal energy thing is the main subject of the article, but for whatever unknowable reason, the author of the article mentioned the heat pump thing as context.