How common is the type of Heating, where you live, that uses an element material as part of the ceiling tiles, or ceiling in general. I disconnected and removed, today, the first system like this, that I have ever seen. Are they still used?, are they still installed?, these days. Is there a brand-name product, of this type?. It just caught me, as strange, I would have thought that UnderFloor heating would be better, maybe I'm wrong(again!). What are your thoughts on this?.