Combi-steamers can generate both dry heat (like a convection oven) and moist heat (like a steamer) either simultaneously or in alternation as needed. This makes these cooking systems ideal for cooking potatoes and other vegetables quickly yet gently, baking rolls or cakes, or roasting or braising meat. Their versatility gives restaurateurs the flexibility to prepare a wide variety of food more economically and with better results. Convection or fan-assisted ovens are considered a predecessor to the combi-oven, but they lack the steam cooking feature.
The ability to combine hot air and a continuous supply of freshly generated steam inside the cooking cabinet enables a wide variety of cooking techniques in a single cooking system, including steaming, baking, grilling, roasting, deep-frying, and many more. Chefs can combine all manner of cooking methods in the same versatile appliance.
Controlling moisture levels is one of the reasons chefs began wrapping food in paper, aluminum foil, or vegetables. The desire to prevent hot air from drying out food inspired the development of preparation methods like en papilotte and sous vide, both of which are now common in professional kitchens. The most widely used such technique is basting food periodically while roasting it.
Air heats up much more quickly than water, but it doesn't retain heat as long. Although it reacts quickly, air is a poor conductor of heat. Some time ago, food technology researchers discovered that heat transfers to food much more quickly when steam condenses on the food's surface (which is cooler than the surrounding air). In other words, moist, humid air quickly balances out hot and cold spots during the cooking process.
The combi-steamer makes the most of this knowledge: it heats moist air and then transfers the energy from the steam to the food with maximum efficiency. The moisture acting on the product settles (partly) on the food, transferring a great deal of heat and thus a great deal of energy into the food quickly (known as phase alternation). The first RATIONAL combi-steamer was developed in 1976 on the basis of this very principle.
Use of both systems – steam generator and heating element. This makes it possible to adjust humidity settings to the exact percentage. The climate control system regulates humidification and dehumidification precisely.
Benefit:
Preparation methods:
Intelligent combi-steamers make it easy to avoid stressful kitchen situations. Just use the factory-installed cooking process presets, and the cooking system will detect the load quantity and adjust the process intelligently to fit the product. RATIONAL pioneered this concept back in 2004 and has been developing and improving its intelligent processes continuously ever since.
Discover the benefits of the iCombi Pro today.
Combi-steamer/iCombi Pro | Convection oven | |
---|---|---|
Mechanism of action | Combines steam and hot air | Only uses hot air |
Use of steam | ✔ | ✖ |
Use of hot air | ✔ | ✔ |
Combination of steam and hot air | ✔ | ✖ |
Precise temperature and humidity control | High | Limited |
Suitability for delicate foods (e.g., seafood, desserts) | Highly suitable | Less suitable |
Suitability for bread and pastries | Optimal thanks to steam feature | Limited by lack of steam |
Regeneration of food | Gentle and efficient | Limited; may dry out food |
Energy efficiency | High | Medium |
Ease of cleaning | Automatic cleaning | Requires manual cleaning |
Procurement cost | Higher than convection oven | Lower than combi-steamer |
Flexibility | Highly flexible, suitable for a variety of dishes | Limited |
Suitability for large quantities of food | ✔ | ✔ |
Practical uses in small kitchens | ✔ | ✔ |
Advanced applications (e.g., sous-vide, smoking) | ✔ (suitable) | ✖ (not suitable) |
Glass doors (so user can see cooking process) | ✔ | Sometimes |
Mechanism of action | |
Combi-steamer/iCombi Pro | Combines steam and hot air |
Convection oven | Only uses hot air |
Use of steam | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | ✖ |
Use of hot air | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | ✔ |
Combination of steam and hot air | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | ✖ |
Precise temperature and humidity control | |
Combi-steamer/iCombi Pro | High |
Convection oven | Limited |
Suitability for delicate foods (e.g., seafood, desserts) | |
Combi-steamer/iCombi Pro | Highly suitable |
Convection oven | Less suitable |
Suitability for bread and pastries | |
Combi-steamer/iCombi Pro | Optimal thanks to steam feature |
Convection oven | Limited by lack of steam |
Regeneration of food | |
Combi-steamer/iCombi Pro | Gentle and efficient |
Convection oven | Limited; may dry out food |
Energy efficiency | |
Combi-steamer/iCombi Pro | High |
Convection oven | Medium |
Ease of cleaning | |
Combi-steamer/iCombi Pro | Automatic cleaning |
Convection oven | Requires manual cleaning |
Procurement cost | |
Combi-steamer/iCombi Pro | Higher than convection oven |
Convection oven | Lower than combi-steamer |
Flexibility | |
Combi-steamer/iCombi Pro | Highly flexible, suitable for a variety of dishes |
Convection oven | Limited |
Suitability for large quantities of food | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | ✔ |
Practical uses in small kitchens | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | ✔ |
Advanced applications (e.g., sous-vide, smoking) | |
Combi-steamer/iCombi Pro | ✔ (suitable) |
Convection oven | ✖ (not suitable) |
Glass doors (so user can see cooking process) | |
Combi-steamer/iCombi Pro | ✔ |
Convection oven | Sometimes |
Conventional convection ovens only work with dry hot air, while steamers only deliver moist heat. The combi-steamer goes one key step further by combining the two technologies – and thus replacing conventional cooking systems entirely. Its ability to coordinate heat and steam precisely allows it to adapt to any food and any culinary need – while delivering uniformly high-quality results. As such, there are no applications for which convection ovens are more suitable than combi-steamers.
A combi-steamer is a professional oven that combines hot air and steam in variable proportions to cook food gently, evenly, and efficiently. Modern models like the RATIONAL iCombi Pro allow precise temperature, humidity, and cooking time regulation, so users can get consistently excellent results on a wide variety of dishes.
Thanks to their flexibility in cooking method applications, combi-steamers can cook almost any food perfectly, from meat and seafood to vegetables and baked goods. A single cooking system can handle steaming, convection cooking, grilling, roasting, and even baking.
Combi-steamers let users combine multiple cooking methods: Steaming to preserve nutrients, convection for crisp browning, grilling functions for appetizing grill marks, and gentle regeneration of previously prepared food. Juicy roasts, tender fish filets, crunchy vegetables, fluffy cakes – the possibilities are nearly endless.
Combi-steamers combines steam and hot air within an insulated cooking cabinet. In the RATIONAL iCombi Pro, sensors continuously measure temperature, humidity, and cooking progress. This intelligent regulation creates optimal conditions for each dish in order to ensure uniformly excellent results.
Combi-steamers are generally available as both electric and gas-powered models. The ideal choice depends on the individual kitchen's needs. The RATIONAL iCombi Pro is available with either electrical or gas connections.
Conventional ovens mainly work with dry heat, whereas combi-steamers can introduce steam into the cooking cabinet as well. This enables precise regulation of both humidity and temperature. The result: juicier food, shorter cooking times, reduced cooking losses, and more consistent quality. The RATIONAL iCombi Pro makes the most of all of these benefits.
Combi-steamer purchases pay off in the medium term, as they optimize kitchen processes, save energy, and deliver consistently high food quality. The RATIONAL iCombi Pro offers intelligent programs that monitor cooking progress and thus reduce staffing requirements. It also helps optimize the kitchen's cost of goods, which significantly increases profitability.
Combi-steamers like the RATIONAL iCombi Pro simplify work processes, ensure consistent quality, reduce cooking times, save energy, and optimize resource usage. This results in more effective kitchen processes, less strain on staff, and happier customers.
Whether a combi-steamer requires a separate recirculating hood depends on local regulations and spatial conditions. The iCombi Pro has optional exhaust air systems to divert steam and odors properly.
Factors like capacity, energy efficiency, ease of use, maintenance, and customer service should all be considered when choosing a combi-steamer for a restaurant. The iCombi Pro from market leader RATIONAL offers intelligent regulation, exceptional reliability, comprehensive recipe support, and robust customer service – which means genuine added value for every restaurant.
High throughput, robust construction, and efficient processes are essential in commercial production food service. A combi-steamer like the iCombi Pro from market leader RATIONAL offers large production capacities, flexible cooking programs, easy cleaning, and user-friendly controls – perfect for canteens, hospitals, or schools.
The combi-steamer from market leader RATIONAL, the iCombi Pro, has automatic cleaning systems. Based on how much cleaning it requires, it selects one of several fully automatic cleaning programs that use special cleaning agents and rinse aids. This minimizes the manual effort required.
The service life of a combi-steamer depends on how often it is used, cleaned, and maintained. High-quality cooking systems like the RATIONAL iCombi Pro are designed for long-term professional use; with proper handling and regular maintenance, they can continue working reliably for many years to come.
Combi-steamer energy needs vary depending on the model type, size, and features. Power consumption typically ranges from about 6 kW for the smallest model to 20 kW for a table-top unit. The RATIONAL iCombi Pro is available in different sizes and performance levels to fit any kitchen's individual needs.
Convection ovens or fan-assisted ovens primarily work with hot air (convection), whereas combi-steamers also offer a steam function. Combi-steamers combine the benefits of both methods; this combination of humidity and hot air allows greater flexibility, better cooking results, and more efficient kitchen processes – especially in cooking systems like the RATIONAL iCombi Pro.
It pays off.
Use the RATIONAL ROI calculator to calculate potential savings compared to conventional cooking technology.