Thanks to all for your responses. As an update, my models are now coming more into line, in fact they are appearing to match very closely with the 20% rule-of-thumb that Anthony has seen in his experience. The primary contributors to the eQUEST model becoming more accurate were:

1) The Previous Years of Operation field was set to "0", so I changed it to be "20".

2) I loaded in some typical ClimateMaster performance curves in lieu of using the default eQUEST curves.

I now have an eQUEST model that is utilizing an 80-bore hole well field with bore lengths approximately 20% shallower than what is being calculated by the Gaia GLD software.

Thanks again for all the input.

Dan Russell
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