A few months ago on one of the DYI shows, I saw an electrical heating system for bathrooms without heating ducts. Putting it simply, it was like a giant heating pad (about 6'x6' and about 1/4 to 1/2" thick) that installed under the ceramic tile. The concept was that it heated the ceramic tile, and provided radiant heat. Has anyone heard of such a product? If so, where can I find them, what are the called, etc. Any help would be Greatly appreciated.