I installed a ground sourced heat pump a couple of years ago, and my heat pump manufacturer refers to it as geothermal: https://www.waterfurnace.com/switch http

I installed a ground sourced heat pump a couple of years ago, and my heat pump manufacturer refers to it as geothermal: https://www.waterfurnace.com/switch https://www.waterfurnace.com/switch . Most people don't think of this as 'geothermal' however so I avoid using the term.