has anyone tried doing a system using pvc and running warm water through it? in the zig zag form? of course you would need a huge setup, but I was thinking about heated garages out here, and how we use this setup to do radiant heat. I'm thinking of scraping one section of my bar, and doing the whole wall into a rack system. It's almost 14-15ft long, and just over 2 feet deep, and 7 foot ceiling. I love diy threads, this is a keeper for me. (sorry if I'm thread stealing)