A commercial combi oven combines three cooking modes in one cabinet: dry convection heat, steam, and a combination of both. That flexibility lets a single unit roast, bake, steam, poach, grill, and regenerate food, which is why combi ovens have become the workhorse of high-output professional kitchens. If you are weighing one up for 2026, the decision comes down to size, energy type, boiler or injection steam, and the level of automation you actually need.
This guide walks through how combi ovens work, the core features that matter when you buy, and how to match a unit to your menu and venue. The aim is simple: help you spend on the capability your kitchen will use, and skip the features it will not.
📋 What this guide covers
- What a combi oven is and the three modes it runs
- Boiler versus injection steam generation, and which suits your water and workload
- Sizing by tray capacity, plus gas versus electric considerations
- The features worth paying for, from automatic cleaning to core temperature probes
- How to choose the right combi oven for your menu and space
What is a combi oven?
A combi oven, short for combination oven, is a single appliance that cooks with convected hot air, steam, or both at once. By controlling temperature and humidity together, it gives you precise results across a wide range of dishes without tying up several separate pieces of equipment.
The three modes each have a job:
- Convection (dry heat): Roasting meats, baking pastries, and browning. Hot air circulates evenly for consistent colour.
- Steam: Vegetables, seafood, rice, and gentle poaching. Moist heat protects texture and nutrients.
- Combination: Controlled humidity alongside dry heat. This reduces moisture loss, improves yield on roasts, and keeps baked goods from drying out.
How combi ovens generate steam
Steam generation is one of the biggest decisions when choosing a combi oven, because it affects performance, cleaning, and running costs. There are two main systems.
| Steam system | How it works | Best suited to |
|---|---|---|
| Boiler (generator) | A separate boiler heats water and feeds steam into the cavity | High-volume kitchens needing strong, consistent steam output |
| Injection (direct spray) | Water is sprayed onto the heating element or fan to flash into steam | Smaller venues wanting lower upkeep and a lower entry price |
Boiler systems deliver instant, powerful steam and tend to perform better in busy kitchens, but they need regular descaling, especially in hard-water areas. Injection systems are simpler and often cheaper to buy and maintain, though steam output can be less consistent under heavy load.
ℹ️ Water quality matters
Scale build-up is the most common cause of combi oven service calls. If your area has hard water, factor in a water filtration or softening system from day one. It protects the boiler, steam injectors, and seals, and keeps the unit running reliably.
Sizing a combi oven for your kitchen
Combi ovens are measured by tray capacity, usually in GN (gastronorm) pan sizes. Common formats include 6-tray, 10-tray, and 20-tray models. Choosing the right size is a balance between peak demand and the floor and bench space you have.
- Cafés and small kitchens: A 6-tray countertop combi handles moderate covers and fits where space is tight.
- Restaurants and hotels: A 10-tray model offers the flexibility most mid-size venues need across a varied menu.
- High-volume and production kitchens: 20-tray floor models, or roll-in trolley versions, suit banquet, aged care, and central production work.
Leave room for door swing and tray loading, and confirm the unit fits under your extraction canopy. It often makes sense to view a combi oven alongside the rest of your commercial ovens so the whole cooking line works together.
Gas or electric?
Both energy types are widely available, and the right choice depends on your site services and running costs.
- Electric combi ovens: Often more even in their heat distribution and simpler to install where gas is not connected. They suit sites with adequate three-phase power.
- Gas combi ovens: Can be more economical to run where gas is cheaper than electricity, and they reduce electrical load. They need a gas connection and appropriate flueing.
Check your available power supply, gas availability, and ventilation before committing, as these site factors often decide the matter for you.
Features worth paying for
Modern combi ovens carry a long feature list. These are the ones that earn their place in a working kitchen.
- Automatic cleaning: Built-in wash cycles save labour and keep the cavity hygienic. For kitchens running long services, this is often the single most valuable feature.
- Core temperature probe: Cooks to a precise internal temperature, which improves consistency and supports food safety records.
- Programmable recipes: Stored cooking programs let any staff member reproduce a chef's result, which protects quality during busy or short-staffed shifts.
- Humidity control: Fine control over moisture is what separates a combi from a basic convection oven, so look for clear, adjustable settings.
- Multi-point probes: Useful for large cuts where you want the coolest point measured accurately.
🔧 Pro tip, buy for the menu you cook
It is easy to over-specify. List the dishes that will actually go through the oven each week, then choose the size and features that serve that list. A 10-tray boiler combi with auto-clean and a probe covers the vast majority of restaurant menus without paying for capacity you rarely use.
Why combi ovens are worth the investment
A combi oven replaces several appliances, which frees up floor space and reduces the equipment you have to maintain. The combination mode improves yield on roasts by limiting moisture loss, and precise humidity control gives more consistent baking and steaming. Over a long service life, that consistency and reduced waste is where the value sits.
For a focused look at the available models, browse our commercial combi ovens range. If you want proven, high-end steam performance, the Convotherm combi ovens are a long-standing benchmark in Australian kitchens.
⚠️ Plan ventilation and services first
A combi oven needs correct extraction, water supply, drainage, and the right power or gas connection. Confirm these site requirements before purchase. Retrofitting services after delivery is expensive and can delay your kitchen opening.
Frequently Asked Questions
Almost anything. Combi ovens roast meats, bake bread and pastries, steam vegetables and seafood, poach, grill, and regenerate pre-cooked food. The three modes (convection, steam, and combination) cover most of what a busy kitchen needs from a single unit.
Boiler systems give stronger, more consistent steam and suit high-volume kitchens, but they need regular descaling. Injection systems cost less to buy and maintain and suit smaller venues. Your water hardness and daily volume usually decide which is right.
Match tray capacity to peak demand and available space. A 6-tray countertop unit suits cafés and small kitchens, a 10-tray model fits most restaurants and hotels, and 20-tray floor models suit high-volume and production kitchens.
Yes. They require correct extraction, a water supply, drainage, and either three-phase power or a gas connection with flueing. In hard-water areas, water filtration is strongly recommended to prevent scale damage.
