Combi Steamer vs. Convection Oven - Differences Explained
Combi steamers and convection ovens are often confused but are different devices. The combi steamer is the further development of the convection oven with an additional steam function. We explain the differences.
What is a Convection Oven?
A convection oven (also called a hot-air oven or circulating air oven) is a professional cooking appliance that works with circulating hot air. A fan distributes the heated air evenly inside the cooking chamber, allowing multiple trays to cook simultaneously and uniformly. Convection ovens reach temperatures up to 300 °C and are ideal for baking, roasting, grilling, and gratinating. They have a simpler construction, are cheaper to purchase, and require less maintenance than a combi steamer—but cannot steam.
Typical areas of use are bakeries, patisseries, pizzerias, snack bars, and large kitchens focusing on baked goods and roasting. Well-known manufacturers include Rational, UNOX, Bartscher, and Saro.
What is a Combi Steamer?
A combi steamer is the further development of the convection oven: it combines hot air and steam—either individually or together. This means it can not only bake and roast but also steam, cook, poach, regenerate, and prepare sous-vide. A combi steamer thus replaces several appliances and is today the standard in modern professional kitchens.
The Most Important Differences
Convection Oven
The Hot-Air Specialist
- Works only with hot air (circulating air)
- Temperatures up to 300°C
- Ideal for baking, roasting, grilling
- Simpler technology
- Cheaper to purchase
- Less maintenance
Price: 1,500 - 8,000€
Combi Steamer
The All-rounder
- Hot air AND steam (combinable)
- Temperatures 30-300°C
- Can steam, bake, roast, cook, regenerate
- More complex technology
- Higher acquisition costs
- More maintenance (descaling)
Price: 4,000 - 30,000€
Cooking Methods Compared
| Cooking Method | Convection Oven | Combi Steamer |
|---|---|---|
| Baking (bread, cake) | ✓ Yes | ✓ Yes |
| Roasting (meat) | ✓ Yes | ✓ Yes (gentler) |
| Grilling/Gratinating | ✓ Yes | ✓ Yes |
| Steaming (vegetables, fish) | ✗ No | ✓ Yes |
| Sous-vide / low temperature | ✗ No | ✓ Yes |
| Regenerating | △ Limited | ✓ Yes (without drying out) |
| Poaching | ✗ No | ✓ Yes |
| Braising | △ Limited | ✓ Yes (optimal) |
When to Use Which Device?
A convection oven is sufficient for:
- Bakeries (rolls, bread, cake)
- Pizzerias (in addition to pizza ovens)
- Snack bars focusing on baking/grilling
- Operations with tight budgets
- Simple menus
Combi steamer recommended for:
- Restaurants with versatile cuisine
- Hotels (breakfast + restaurant)
- Canteens and large kitchens
- Caterers (regenerating food)
- Health-conscious concepts (steaming)
- Cook & Chill systems
Advantages of the Combi Steamer in Detail
- Less weight loss: Meat loses up to 50% less weight through the addition of steam
- Gentler cooking: Vitamins and nutrients are better preserved
- More capacity: Multiple cooking methods possible simultaneously
- Energy efficiency: Due to shorter cooking times and multiple loading
- Better results: Professional quality even in large quantities
- Automatic programmes: Modern devices have intelligent cooking control
For even more details, read our guide Combi Steamer: Advantages, Functions & Applications.
Operating Costs
| Cost Factor | Convection Oven | Combi Steamer |
|---|---|---|
| Acquisition (10 GN 1/1) | 3,000 - 6,000€ | 8,000 - 20,000€ |
| Electricity consumption | Moderate | Similar to higher |
| Water consumption | Minimal | Higher (steam) |
| Maintenance/year | 100 - 300€ | 300 - 800€ |
| Descaling | Not necessary | Regularly required |
Frequently Asked Questions about Convection Oven & Combi Steamer
What is the difference between convection oven and combi steamer?
A convection oven works exclusively with hot air (circulating air). A combi steamer can additionally cook with steam—either alone or combined with hot air. The combi steamer is therefore more versatile, the convection oven simpler and cheaper.
What can a convection oven do?
Baking, roasting, grilling, and gratinating with hot air up to 300 °C. Steaming, poaching, or low-temperature cooking is not possible with a pure convection oven—you need a combi steamer for that.
Can you bake cake in a convection oven?
Yes. Thanks to the even circulating air, the convection oven is very suitable for baking cakes, bread, and pastries—often on several levels at the same time.
How much does a convection oven cost?
Depending on size and equipment, convection ovens usually range between 1,500 and 8,000 € net. Combi steamers start at about 4,000 € and can go over 30,000 € for large kitchen devices.
Which manufacturers make convection ovens and combi steamers?
Leading manufacturers include Rational and UNOX as well as Bartscher and Saro. At Gastro-Nik, we advise you across manufacturers and find the right device for your operation.
Which device is suitable for which operation?
A convection oven is sufficient for bakeries, pizzerias and operations focused on baking and roasting. A combi steamer is worth it for restaurants, hotels, canteens and large kitchens with versatile menus.
Conclusion
The convection oven is the economical choice for operations mainly baking and roasting. Simpler, cheaper, less maintenance.
The combi steamer is the investment for versatile kitchens. The higher acquisition costs pay off through better quality, less weight loss and more possibilities. It is the standard today in modern professional kitchens.
Your Experts for Rational & UNOX
As a specialist dealer, we cooperate with the leading combi steamer manufacturers Rational and UNOX. Whether compact convection oven or high-end combi steamer for large kitchens—we advise you across manufacturers and find the device that fits your operation and budget.
Rational or UNOX? In our brand comparison Rational vs. UNOX we explain the differences between the two manufacturers.
Still unsure which model is right? Contact us—we will create a non-binding offer for you.
Combi Steamers & Convection Ovens at Gastro-Nik
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Discover devicesLast updated on 8 July 2026.