Ron I have made it to 36 feet deep before. So I think I can go deeper if I need to. I guess my main concern was the lube not flowing if I keep going deeper. Going to 3/8 tubing at 30ish feet might be best. I can go to 7,000 BTU system if need be (or larger). Window units are EVERYWHERE around here. And I was also planing a electric back up element if needed. Thanks for the advise.
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