The 5 rack levels of the ETNA OM165RVS allow you to prepare multiple dishes at the same time. The fan ensures a uniform airflow that reaches every corner of the oven so that every dish is evenly heated. You can choose between upper heat, lower heat, upper and lower heat, and a grill function. Depending on the preparation of your dish, these functions can be used either independently or in combination with one another. The oven functions are easily selected via its 3 dials: the left for selecting the oven function, the middle one for selecting the time, and the right for selecting the temperature.