This is my first heating season with geothermal (TT30 closed loop, Stage 1 only) and I wanted to get a feel for what it is doing, how it is operating. When the system first turns on, the water-in temps are around 50, and drop to mid 40s after a couple hours. The water-out temps are 6 degrees cooler. The supply air is staying at around 85deg while the return air is in the mid 60s. Can someone explain what is happening to provide around 20deg of heat increase to the air, using the 6 degrees of "heat" being extracted from the water temps? Are my temps normal? My understanding of heat extraction and delivery from water that seems nearly freezing is pretty limited.