^First guys, if you don't hear from sales, please just email again.
They have had several reports of email not getting through, and have discussed this with our ISP.
I have nothing to do with sales, and do not have access to there database, I am just an engineer.
Dick I would run in two seperate loops, both meeting at reserve.
Too date this has been the most effective configuration.
Running one loop at high pressure / flow will not be as effective as two loops at lower pressure / flow.
I would also suggest, given all that plumbing, you cosider one of the non-conductive fluids, as your chances of leaks are higher then average system.
Post some pic's when your done!