The Geological Survey of Estonia has commenced heat supply from a 712.5-meter borehole in Arbavere, Estonia, marking the country's deepest thermal borehole.
The borehole, located in Lääne-Viru County's Arbevere village, now provides heating and cooling to the Geological Survey's research center buildings.
No direct quotes available in the text.
Author's summary: Estonia's deepest borehole provides heating and cooling.