Looking for More Details on Geo-Exchange

Like Tantalous, the mythological king cursed by tree-borne fruit just beyond his reach, we too are teased about “one of the largest” geo-exchange systems in higher education but never provided satisfying substantive elaboration about it for our fuller understanding (“Laying the Groundwork,” April issue). Inquiring minds wish to know how the “long tubes bent in a U-shape” relate to the “holes 600 and 850 feet deep.” It is understood that supply-chain issues put paper at a premium recently but a referenced link in the article will be easy enough to include when future articles encounter similar limits.