I have a horizontal closed loop system. The earth surrounding my loop is of a red clay which is roughly 30 % water. The installers added enough methanol to protect my loop to 25 degrees F. My 2 stage unit exhibits an incoming vs. outgoing delta of approx. 3 degrees on low and 4 degrees on high speed. It's only the middle of Jan. and my outgoing loop is already down to 33 degrees. My understanding of the science of freezing water is that enormous amounts of energy is released as it freezes. Once my outgoing loop temp. reaches 32 degrees and begins to try to freeze the surrounding earth and its water content, will the loop temp. stabilize and cease to cool while absorbing this massive energy release? If not, it would appear to me my loop is substantially undersized, and I'm in for an expensive rest of the heating season using my backup resistance coils.