Technical details & equipment.
Because details make the difference.


Maximum work safety thanks to low rack heights.
RATIONAL sets trend-setting standards. All unit sizes have a topmost rack placed at a height of no more than 5’3” (1.60 m).

Rear-ventilated double glazed door with heat-reflective coating.
The design ensures that the outer pane remains cool to the touch, and also makes it easy to clean between the panes.

Integrated door drip pan.
The door drip pan is drained continuously, even while the door is open, effectively preventing puddles of water on the floor.

RATIONAL ConnectedCooking.
Our modern, cloud-based networking solution for professional kitchens ensures that you’re always on the safe side: its HACCP documentation feature records key data for all connected units completely automatically, displays it clearly, and stores it. Of course, you can also easily export the data in table or PDF format, and then save it separately or print it out.


Cooking technology.

The measuring and control center automatically maintains the cooking cabinet climate that you set. In combination with the most effective dehumidification technology available, this ensures that you always get crisp crusts, crunchy breading and exceptionally juicy meats.

The generator, with its new steam regulation function, continually delivers 100% hygienic steam to ensure top-quality cooking results. Maximum steam saturation, even at low temperatures, prevents food from drying out in the slightest.

Completely innovative dynamic air mixing and a specially shaped cooking cabinet help distribute heat evenly throughout the cooking cabinet interior. This is essential to ensuring exceptional uniformity, even with full loads.

Cleaning and replacing conventional grease filters is now a thing of the past. Grease is automatically separated in the fan impeller, keeping the cooking cabinet air clean to prevent flavor transfer.

Resource efficiency.

Needs-based energy delivery.
Completely redeveloped control system technology supplies food with exactly the amount of energy that it can actually absorb.

Integrated sealing mechanism on floor units (patent).
Whether you’re using a mobile oven rack or not, the integrated sealing mechanism works without an additional sealing plate, and ensures that neither steam nor heat can escape.

Takes up 28% less space.
The unit’s compact dimensions reduce the volume to be heated, which in turn lowers energy consumption rates. The narrow cooking cabinet door opening results in a smaller swing range, ensuring that less energy will be lost when the door is opened.

High-performance heat exchanger (patent) on gas units.
The heat exchanger’s special design makes it extremely efficient. Large, smooth surfaces make cleaning much easier. The gas burners were awarded the German Gas Industry’s Prize for Innovation in recognition of their particularly low-emission combustion.



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 (Swiss Association for the Gas and Water Industry) standards.


The integrated, EN 1717-compliant free drain eliminates the need for a separate funnel. SVGW-approved.

Lengthwise loading allows the usage of 1/3 and 2/3 GN containers. 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’s research.



We would be delighted to answer any questions about our products and RATIONAL.

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If you have any application questions, you can call upon the experience of our RATIONAL master chefs 365 days a year.

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