External steam generation 

The benefits of external steam 
Innovative steam system: the steam generator in our appliances is located outside the oven compartment. During the cooking process, the incoming steam completely fills the oven compartment and displaces the oxygen. This results in fast heating and optimum temperature measurement and preserves the natural colour of the food. And because limescale cannot build up in the oven compartment, cleaning is particularly easy.
Images serve as examples to illustrate the product benefit. Actual feature may vary per model.