Why heating devices are always placed under a window? If the windows are not properly insulated, the heat doesn’t just go out the window?

Question

Why heating devices are always placed under a window? If the windows are not properly insulated, the heat doesn’t just go out the window?

In: Other

Answer 1

Another factor is that if you have windows on one side of a room and a radiator on another side then the hot air above the radiator will rise, and the cold air by the window will fall, setting up a powerful convection current. This will result in a cold draught across the floor which is extremely unpleasant.