RATIONAL Duo Double Stacked Electric Combi Oven – High-Performance Commercial Combi Oven

The RATIONAL Duo double stacked oven brings two high-powered RATIONAL iCombi Pro® electric combi ovens into a single space, delivering unmatched flexibility and capacity for professional kitchens. Designed as high-performance cooking equipment, this commercial combi oven system lets chefs simultaneously steam, bake, roast, grill and re-therm foods using two independent units. With the patented Combi-Duo stacking kit, the ovens safely mount one atop the other in a “one-oven” footprint – maximizing kitchen space while doubling cooking throughput. The top control unit can even operate both ovens, giving chefs convenient access to both cavity’s settings from a single interface. This intelligent dual-oven design delivers “greater convenience” and “greater flexibility,” especially in busy, high-volume operations.

Commercial-Grade Performance and Intelligence

RATIONAL combi ovens are engineered for the demands of professional kitchens. The Duo stack features two fully independent RATIONAL iCombi Pro® units, each equipped with an electric steam generator and convection heating. Together they offer a broad temperature range for steaming, convection baking, and combination cooking. The system’s cooking intelligence (iCookingSuite) automatically adjusts cooking times and modes for consistent results, while the iDensityControl and iProductionManager assistants optimize climate and batch scheduling. With six automatic cooking modes (plus additional manual modes), the ovens learn from each cook cycle to refine recipes, reduce error and minimize food shrinkage. Both ovens are network-compatible, Wi‑Fi and Ethernet enabled, and meet rigorous standards (NSF, UL, CE, ENERGY STAR®) for safety and efficiency. As a Rational electric combi oven, the Duo delivers precise steam injection and convection control for high-volume kitchens, making it a truly high-performance cooking equipment solution.

Versatile Double-Stack Configurations

The Duo is stocked in two powerful configurations to fit different kitchen needs. One option pairs a 10-pan (full-size) combi oven on top of a 6-pan unit, while the other is two identical 6-pan ovens stacked. Both set-ups come complete with a stainless steel base stand and stacking kit. In the 6-full + 10-full model, the combined system handles an immense load – up to 16 full-size sheet pans (18″×26″) or 32 steam table pans (12″×20″) at once. The 6+6 stack still delivers robust capacity, accommodating up to 12 sheet pans or 24 steam pans in continuous operation. These configurations provide unmatched flexibility: kitchen teams can run different processes side-by-side (for example, roast in one oven while steaming vegetables in the other) to boost output. Because each oven maintains its own climate and cooking cycle, throughput is effectively doubled without extra floor space.

• 10-Pan + 6-Pan Stack: Combines a 10-sheet and 6-sheet RATIONAL combi oven. It’s ideal for high-volume operations needing maximum output within a compact footprint.

• 6-Pan + 6-Pan Stack: Two identical 6-sheet ovens. Each oven holds 6 full-sheet pans (or 12 steam pans), yielding 12 sheets (24 pans) total. This symmetrical setup is perfect when kitchens need dual ovens of equal size for balanced batch workloads.

• Flexible Use: Both configurations leverage the same RATIONAL cooking suite, and can operate independently or together. Cooks can switch between steam, convection or combined modes in either unit, allowing different menu items to cook simultaneously without flavor transfer or scheduling conflict.

Space Efficiency and High Capacity

Maximizing space is essential in any commercial kitchen. By stacking two ovens, the RATIONAL Duo fits into roughly the same footprint as a single oven. This one-oven footprint design frees up valuable floor space for other equipment or prep areas. Despite its compactness, the double-stacked system doubles cooking capacity, which is crucial for restaurants, cafeterias, catering operations and other high-volume settings. In practice, a kitchen running the 6+10 stack can cook two full sheet-pan batches at once where a single oven would take two cycles. Similarly, the dual 6+6 stack cooks twice the food simultaneously. This increased capacity helps kitchens serve more meals per hour without needing additional units.

• Dual Chambers: Each oven has its own insulated cooking chamber and door. This means two separate workloads can proceed at once – for example, grilling in one and baking in the other – so production time is slashed.

• Productivity Multiplier: As one vendor notes, “making a wide variety of food within a single unit has never been easier than with [one iCombi Pro], and you can now double that productivity with this stacked Duo model”.

• Consistent Quality: Even under heavy use, RATIONAL’s closed-loop climate sensors and algorithms guarantee even cooking and humidity control, so food quality remains consistent meal after meal.

Advanced Cooking Intelligence

Behind the Duo’s raw capacity is RATIONAL’s award-winning cooking intelligence. The iCombi Pro ovens integrate four “smart assistants” that take over many routine tasks:

• iCookingSuite: Chooses optimal mode (steam, convection or combination) and adjusts time/temperature on the fly based on load and recipe.

• iProductionManager: Automatically schedules batches and lets chefs define load sequences, balancing speed and finish quality.

• iDensityControl: Maintains the right steam saturation for each cooking method, ensuring even baking crusts or tender steaming every time.

• iCareSystem: Manages cleaning and descaling. Sensors detect soil and limescale, so the oven recommends a wash cycle only when needed, saving water and energy.

These features turn the RATIONAL Duo into more than “just an oven”. It learns from past cooks and guides kitchen staff with prompts and error messages, reducing waste and labor. Professional kitchens benefit from this automation because it minimizes guesswork and yields repeatable results even when employees change shifts.

Built for Commercial Kitchens

Constructed of heavy-duty stainless steel and certified for commercial use, the RATIONAL Duo is built to withstand rigorous daily operation. Each oven uses a powerful electric steam generator to meet NSF/ANSI and UL standards, and the entire stack is ENERGY STAR® qualified for efficiency. The included open base stand is welded from polished stainless steel; its open design provides full under-oven ventilation and maintains ideal ergonomics (the ovens sit at a convenient working height). Because the stand locks securely (no casters), the stack is stable during high-throughput cooking.

Maintenance is fast and safe. RATIONAL’s iCare cleaning program can scrub both ovens in under 15 minutes with an automated cycle, avoiding chemical burns or manual scrubbing. Water filters (available separately) and a 6-point core temperature probe (included) further ensure precision and hygiene. In short, the Duo stack reduces downtime: between its quick-clean modes, reliable controls, and robust construction, a RATIONAL double-stacked combi oven runs smoothly day after day with minimal intervention.

Key Features at a Glance:

• Commercial Combi Oven Duo: Two RATIONAL electric combi ovens (stacked) for simultaneous cooking.

• High Capacity: 6-full + 10-full stack holds up to 16 full-sheet pans; dual 6-full stack holds up to 12 sheet pans.

• Flexible Cooking Modes: Steam, convection, combination and specialized modes (bake, roast, retherm) in each chamber.

• Intelligent Control: Touchscreen interface with pre-programmed and custom cooking profiles; iCookingSuite and iDensityControl automate precision.

• Space-Saving Design: Two ovens in a single footprint, conserving floor space while doubling output.

• Stainless Construction: Durable stainless steel oven chambers and stand; full ventilation and easy access for cleaning.

• Certified and Efficient: NSF/UL/CSA certified, Wi-Fi/Ethernet ready, ENERGY STAR qualified, with quick-clean and eco modes for sustainability.

The RATIONAL Duo Double Stacked Electric Combi Oven is ideal for high-volume restaurants, hospitals, schools, and catering operations where reliable multi-functionality and throughput are essential. By combining two Rational iCombi Pro ovens, it empowers chefs to prepare more dishes in parallel without expanding the kitchen’s footprint. As one chef summarizes, “Stacking RATIONAL combi ovens means maximum flexibility in minimal space”. Invest in this high-performance cooking equipment to future-proof your kitchen’s productivity and adapt to any menu challenge.