It would seem that the answer is obvious, once we walk across the floor and almost all its life in the bottom of the flat (rare moments of replacement bulbs can be neglected), the heaters must have a floor. It seems to be true, if not … but one infrared rays (or as they are called doctors "rays of life") subject to the laws of optics. So, with underfloor heating infrared energy is distributed in all directions and absorbed by objects that occur on the road, the air is out, it is transparent to infrared radiation as well as for visible light). Across the floor – the ceiling. This means that warmed the ceiling? Yes, but do not jump to conclusions, this effect is less noticeable when using films with a solid the heating layer as a heating systems STB, but basically there is a "striped" films due to higher temperatures and lower bands of the radiation wavelength. But if the ceiling surface to place a reflector foil for example, or metalized film, almost all thermal energy back down and absorbed by the floor (approximately 40% savings).

The second option – placing the film on the ceiling. Well, there seems to be quite simple, once the floor warms the ceiling, then Ceiling heaters must heat the floor. So it is. And if the supply ceiling insulation (for that would heat the contact method of heating the film does not go into slabs) and the reflective layer (for that would direct infrared radiation in the desired direction), we obtain an effective heating system. The beauty of such a heating system with the ability of rapid acceleration, which is good if you use an infrared heat occasionally. Cons – it is not clear why heat the upper surface of the furniture.

And the last option – the wall. This method of placement is relevant to the creation of local "hot corners" in the room. Then the heat is absorbed directly a man who does not want to spend money on heating of the space where it is not. What happens? And get this. Location of the film in a room depends on the specific conditions of design features space, fullness furniture, and other factors. Absolutely correct and the only true answer to the question posed in the title there. But there is a choice. A choice – it's free. Be free to choose the comfort of heating systems. PS Someone might say – so many nuances and complexities? My answer – in any of these options, film infrared heating system much more efficient than the traditional one. For her future.