I am getting ready to make a parts list.
I already own one of these
http://www.amazon.com/gp/product/B00...rch_detailpage would this pump work?
I do have a question, I know with closed loop you can add antifreeze to the loop which gives you the ability to have lower temps/keep it from freezing up. Do I only need a temp sensor on the coaxial coil to make sure it doesn't get too cold? Like at 38F it starts to back down on the compressor power until the water warms back up? I should have an endless supply(not really) of 50F+ water. So as long as my coaxial coil is the right size (5ton) then I should not have any freezing.
This make sense?