Thread: DIY heat pump??
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Old 10-08-2008, 10:34 PM   #19 (permalink)
Xringer
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"installing the reversing valves"..

Wouldn't those valves be unnecessary for heat-only system?

I've heard that the direct exchange type ground loop systems use copper in their
ground loops. That must be the best stuff to use, if you're pumping refrigerant into the ground loop.
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Rich

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