Thanks Guys, I have a 2 year old 3 ton ac only unit that I was given that I may try my experiments on. I have some of the tools and a federal license to recover the freon so that isn't a problem. I will have to do some practicing on soldering in the plate heat exchanger but it looks like the mig cover gas works okay to keep the inside of the copper clean. I wish I'd have put the copper coil in the well when I put the well in last year. The pulling the pump shouldn't be to bad but the digging the ground back up to put in the pipe won't make the wife happy. The well is 130 or so feet from the house so I might as well put a slinky ground loop over to it. With any luck, presto..... low cost geothermal. Rick
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