To be a true heating or cooling panel, the surface temperature of the panel must be controllable and not exceed 300°F. (Most panels operate under 150°F; floors generally less than 85°F.) It is only a "radiant" panel if 50% or more of the heat transfer is by radiant energy. You may be more familiar with terms like "radiant floor" or "radiant ceiling" heating, or "radiators". These are not to be confused with hot water or electric baseboard heaters which actually produce only a small percent of radiant energy and primarily heat air.