The surface heating system consists of a heat-conducting plate, which usually also forms a decorative inside the toilet cubicle wall, the actual heating element and a thermostat. 

The heating element, and the internal control and limiting thermostats are screwed on the back of the heat conduction plate. The heating element and the thermostats can be replaced separately in the event of damage. This design is the area of heating, from the interior of the cabin, not recognizable as such and thus offers protection against vandalism.