Hello, I'm new here; but I've been reading posts from this forum for quite some time. Great information. I've been thinking a lot lately about my radiant ceiling heat. The house was built in 1968, and has 220V ceiling heat, the brand is "SWAN" on the thermostats. I've lost two zones - one in an entryway so I don't worry about it, the other is 1/3 of my kitchen. I've recently discovered the wide variety of floor electric systems, but most have to be set in cement underneath the flooring. Then I discovered these: http://cozywinters.com/shop/rug-heat.html What a great idea! With these, my floor is just a floor, my ceiling just a ceiling, and my radiant panels can be rolled up and stored with the rugs in the summertime. I have some questions I'd love to get your advice/opinions on: Has anyone had any experience with radiant electric floor heating? How does the efficiency compare with in-ceiling radiant? How durable is it? Will I lose efficiency by using 110V vs 220V? Has anyone heard of converting a home from ceiling to floor electric radiant heat?