Technical details & equipment.
Because details make the difference.


Low tray height for maximum working safety:

RATIONAL sets a standard that leads the way. The topmost rack is 5.25 ft. (1.60 m) high in all unit sizes.

Back-ventilated double-glazed door with heatreflecting coating:

The design guarantees a low contact temperature on the outer panel, and also makes it easy to clean between the panels.

Integral door drip pan:

The door drip pan is drained constantly, even while the door is open, which effectively prevents puddles of water on the floor.


Cooking technology.

The measuring and control center automatically maintains the cooking cabinet climate that you set. This combines with the most effective dehumidification technology, so that you achieve crunchy crackling, crispy breaded coatings, and maximum succulence.

The generator with new steam regulator constantly delivers 100 % hygienic fresh steam for optimum food quality. Maximum steam saturation, even in the low temperature range, prevents the food sticking or drying out.

The totally innovative dynamic air mixing and the special cooking cabinet shape ensure that the heat is uniformly distributed in the cooking cabinet. This is essential to ensure a high level of uniformity, even with full loads.

There is no longer any need to clean and replace conventional grease filters. The automatic separation of grease in the fan impeller keeps the cooking cabinet air clean and guarantees a pure taste experience.

Efficient use of resources.

Demand-responsive energy supply:

The entirely newly developed control technology ensures that the food is supplied with exactly the amount of energy that it can actually absorb.

Integral sealing mechanism on floor units (patent):

Regardless of whether a mobile rack is used, the integral sealing mechanism works without an additional sealing plate and allows no steam or energy to escape.

28 % less footprint:
The unit’s compact dimensions reduce the volume to be heated, and thus power consumption as well. The narrow door opening also ensures a small pivot range, and therefore results in reduced energy losses when opening the cooking cabinet door.

High performance heat exchanger on gas units (patent):
The special design of the heat exchanger makes it extremely efficient. Large smooth surfaces make cleaning much easier. The gas burners were awarded the innovation prize from the German gas industry for their particularly low-emission combustion.


User features.

Infinitely variable jet strength and ergonomic design greatly simplify rough cleaning, deglazing and adding water. The integral automatic retraction system and automatic water shut-off mechanism offer optimum safety and hygiene conforming to EN 1717 and SVGW standards (Swiss Association for the Gas and Water Industry).


No separate funnel is needed thanks to the integral free outlet conforming to EN 1717. SVGW-approved.

Lengthwise loading means that 1/3 and 2/3 GN containers can be used. The containers are easy to load and unload.


The USB port allows you to easily document 10 days' worth of HACCP data, upload cooking programs to the unit and update the CombiMaster® Plus software to incorporate the latest results of RATIONAL research.



For additional information, please contact us at:

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