Ahhh. Now we are talking about potential root causes. First of all 20 degree water is frozen solid. If the fluid really is 20 coming in then I would question the length of the of the loop. Regardless, that has to be the major contributing factor to your issues. My non-expert understanding is that an open loop is more efficient than a pond loop and a pond loop is more efficient than a ground loop.
2008, 2011 & 2012 conference attendee. Striving to be the person that my dog already thinks I am.
