Quote:
Originally Posted by randen
...but I saw the amount of copper/ton of heat was 100ft. so a loop of 50 out and 50 back to the manifold. For HDPE its 600ft/ton...
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It would be a good idea to get several verified sources for these estimates.
When I was tracking this kind of thing down, I found a Canadian GSHP company that was doing vertical holes, and their practice was that DX in copper had a 15% advantage over HDPE & water, in other words, a DX bore hole (copper) could be 15% shorter than the same configuration with HDPE and water and deliver the equivalent heat.
Six-to-one advantage of DX & copper sounds extreme to me. I suppose some testing would be in order here, before ordering materials and hoping for the best.
-AC