Closed Loop Geothermal Moves Forward In Germany Support CleanTechnica's work through a Substack subscription or on Stripe. In Geretsried, Germany — an area south of Munich — a Canadian company known as Eavor has started producing electricity from its first closed loop geothermal installation. CleanTechnica has reported recently on open loop systems pioneered by Fervo Energy and Sage Geosystems. Th...