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Old 03-04-15, 07:37 AM   #7
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Originally Posted by Mikesolar View Post
I would guess that you would have stable temps from 10' down or at least no possibility of freezing.
That number will be different in the far north tho. The number may be 20ft.
I was reading on another forum about folks who had installed horizontal loops at 12-15' deep, actually getting inlet water from their loop well below freezing ! Sure, it has been cold in the Midwest USA, with temps below 0F, but if your inlet water temp is below freezing, IMHO, you have a SERIOUS design/installation flaw !
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