What if the loop is compromised.<quoted text>I may not have been on here. Some days I don't read every post but start reading where my last post starts. I have a water to air system that pumps water out of the ground on one side of the house and returned on the other. My aquifer is 37 feet down. A closed loop system is continuous pipe loops in the ground filled with anti-freeze. It does not use ground water at all. I can see where if the heat runs for a long time the ground could warm but would cool back down as soon as it turns off.
Break under ground?