What am I missing in regard to running one with a pond closed loop.
Up here, the water below the ice is basicly 39 degrees, much colder then the ground at 6'
In the summer surface water temp would be 80 in a small pond and about 10 degrees cooler below one thermocline. Which would be much warmer then the ground.
Now I do realize water is much better at heat transfer, but aren't the differences in these temps more then enough to make them less eff?
