<https://www.inspectorsjournal.com/topic/7096-geothermal-closed-loop-system/#comment-54162>
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"Brandon,     I think you know more than you think you know      Thank you for this response. It was very helpful.     Yes, the furnace for this system was in the attic. The entire house was very drafty, so I was called out to conduct an ITI Energy Survey. While scanning the basement, I noticed that the ground loop lines were iced up. I told my client that I didn't know much about these systems, but ice on both of the lines seemed odd to me.     I'm going to call my client and see if I can explain this to him, so he can have a good grasp of what is going on.     I got some pretty cool images from this particular house. The second floor and attic were extremely warm due to an absurd amount of energy loss (poor insulation, leaking ducts, open chases in attic, etc.).     Again, thanks for the response.     Kevin      Click to View     15.64 KB     Click to View     16.73 KB     Click to View     17.63 KB \n"
<https://www.inspectorsjournal.com/topic/7096-geothermal-closed-loop-system/>