Is anyone using geothermal heat to heat a green house.  For example pumping air threw a pipe burried in a trench 200' feet long 6' down?   Or pumping well water trew a hose under the stock tank?  Maybe I should have asked the question before I burried the pipe Hmmmmm. We are in Gainesville, North Florida I do understand the warmest the air comming out of the ground in this are will be about seven…