If you were thinking Geo thermal you could install the field loop down first and the leach-bed on top. The geo loop would be 6 ft and the leach system would be at 2-3 ft. The wet ground coupled with any additional heat will help with the efficiency. I wish I had the opportunity when I had constructed my place. The size of leach-bed the engineers had specified on my site would have covered 1/3 of my geo-loop. I would have made only one mess to fix-up.
Randen
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