In article , "Ed Pawlowski" wrote:

"Shawn Hirn" wrote in message

Heat rises, so placing the radiant heating elements in the ceiling makes
no sense. What that does is heat the space above the ceiling.

Maybe not. If you put a barrier over the top of the heat, it won't go up.
Heat can radiate down, just as the sun does. I'd still rather have it in
the floor, but ceilings can work.

Remember in a apartment, there is a floor then a ceiling, then a floor, then a ceiling,,,,
There is no real insulation between apartments.