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[QUOTE="bfs3, post: 4415676, member: 10189"]
You’re close but that’s not how it heats the people or the objects in the room.  Radiant Heat Transfer doesn’t focus or rely on heating the air.  That would be convection heating.  Instead radiant heat transfers the energy through electromagnetic radiation.  This is how the Sun transfers heat to the Earth through the vacuum of space.  The cooler objects absorb the heat and those objects along with the radiant floor gradually raises the air temperature.  This is why you are more comfortable with radiant heat compared to the air temperature.  Your body and the objects around you will absorb the energy and warm before the air temperature in the catches up.  Thus comfort is satisfied at a lower thermostat temperature.

Electric radiant heat, which is what you would normally find in a ceiling is actually quite expensive.  There are some other products that I’m not too familiar with such as radiant roof panels.  In my experience it works best in the floor.  Also, the temperature below the thermostat will still be cooler than the rest of the room.  This makes sitting down in that room feel drafty due to the chill.
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