What are the distances between various diameters pipes and how will it depend on depth and temperature of the loop?

The distances are calculated by the size of pipe to a certain degree but normally they are placed in the trench at 46 centimeters between each pipe. The depth is dependent only on the frost line in your area with a Horizontal loop. You would place the pipe at approximately 60 centimeters below the frost line.

If you go any deeper there will not be much gain unless you are going into damper (wetter) soil. Remember, as I probably said in an earlier email, "the wetter the soil the better" for thermal conductivity reasons. More.

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