So for me , it all starts here on the ground thawing process, I use a small boiler to heat a 75 gallon Amtrol tank up to usually 120 degrees or so , then circulate that water thru the pex tubing buried in the gh soil, which is basically a 2 ft raised bed,alot goes into this process as you have to blow the glycol out of the tubing then repurge every thing with water, luckily today the temp was above freezing , makes it easier
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