Big Al, welcome to Ecorenovator.
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Originally Posted by Big Al
Your posts like a breath of fresh air .Have always admired the American approach to DIY -want a drilling rig-build one . New Zealand attitude similar.
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Thanks, I take that as the highest complement.
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Originally Posted by Big Al
I am vaguely considering installing on my shed roof a few black painted old radiators and pump summer heat into the ground in the vicinity of the ground loop (aligning shed sloping roof to point South ).
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I don't know the situation on your side of the pond, but over here there are many old flat-plate solar collectors that people want to get rid of. Sometimes free, sometimes maybe $100. A real bargain. I think these would be much better than radiators, especially if you can get them for nearly free.
Regarding the
'vicinity of the ground loop' approach, you should use the actual ground loop. Think of it as your own private energy bank... put energy in when you don't need it, take it out when you do need it.
High density polyethylene is good to 180 degrees F.
If you have any photos of what you are doing, please share them with us, we'd love to see what you have going on.
Best Regards,
-AC_Hacker