1 point
Unless you have a constant heat source (flowing groundwater), you need to pump heat back into the ground in summer or the system will “freeze up” after a few years. If the heat battery of the ground isn’t being recharged, it’ll eventually die.
3 points
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Yup we had that problem at a large shop once. The system was still working but it was really struggling one winter. They were previously using heat only (floor heat), so that spring they installed a few radiators with fans for cooling to push more heat back into the ground. Worked great ever since.
Thermal mass storage system in a way.