I am building a new house and I want to install a geothermal system. I am planning on using a closed loop horizontal slinky configuration. Does anyone know what the specs are as far as spacing is concerned. I have seen some manufactures say to keep the trenches about 10 to 15 feet apart. My lot is 130 by 50. I am putting in a swimming pool so I am limited to about 100 by 50 for the geothermal. I was planning on digging the trenches 45 feet long and 6 feet deep to lay 600 feet of pipe for each ton. I am planning on having 6 tons to run, plus I want to make a run of pipe for the heater for the pool. I would like to make a couple of extra runs in case I need to hook up extra pipe. I am looking at 9 trenches that I would like to build, this would give me about 8 feet of spacing in between each trench. I have read some websites that say to have 10 to 15 feet of spacing, but I have also seen several pictures showing several runs of coil directly next to each other. I live in the south and I am not sure if those pictures are in a certain climate or not. I want to make sure I have the right spacing before I make any moves. Any advice or info would be greatly appreciated, thanks.