What Is a Combination Microwave Oven? | One Appliance, Three Cooking Methods

It uses microwave energy for rapid internal heating and fan-assisted hot air for even browning, all inside a compact unit. Below is what this device does, how it differs from similar appliances, and how to use it.

How a Combi Microwave Does Three Jobs at Once

The microwave function agitates water molecules for fast internal heating, while the convection fan circulates hot air for even browning and crisping. Running both simultaneously lets you roast a chicken in 40 minutes instead of 90, and it comes out browned, not rubbery. Many models add a grill element and a steam function.

Unlike traditional microwaves, combi microwaves typically use a flatbed system—no turntable—allowing a metal rack to slide in for better convection air circulation, easier cleaning, and maximized cavity space. High-end models offer five microwave power levels, dedicated Convection and Broil modes, and some eliminate preheating entirely.

What It Can Actually Cook

• Roasting – chicken, pork, potatoes, root vegetables, with browning and crisp skin
• Baking – cakes, muffins, bread, brownies (convection-only mode for even rise)
• Grilling – fish fillets, vegetables, cheese-topped dishes, toast
• Steaming – broccoli, asparagus, rice, dumplings (on models with steam function)
• Defrosting and reheating – standard microwave speed for leftovers or frozen foods

Using combined microwave-plus-convection can reduce cooking time by 40–50% compared to separate appliances, per manufacturer reports. A chicken that takes 75 minutes in a standard oven may finish in under 40 in a combi microwave, with the same golden-brown finish.

Combi Microwave vs. Combi Oven vs. Wall Oven Microwave Combo

A combi microwave prioritizes the microwave function and adds convection and grill. A combi oven (or steam combi oven) focuses on oven functions (convection plus steam), with microwave speed playing a smaller role; these are more common in professional kitchens. A wall oven microwave combo is a built-in unit with two separate chambers—a convection oven on the bottom and a microwave on top—not a single combined cavity.

For most home kitchens, the combi microwave (single cavity, microwave-first) is practical: it fits where a standard microwave sits, requires no extra cabinet space, and still bakes and roasts. Standard single ovens are roughly 600 mm high, while combination microwaves are typically around 450 mm high.

Key Differences From a Standard Microwave

How to Use a Combination Microwave (Quick Start)

1. Select the cooking mode – choose Microwave-only, Convection-only, Grill, Microwave+Convection, or Microwave+Grill.
2. Set the temperature – typically 160–220°C; 180°C for roasting, 220°C for crisping.
3. Set microwave power (if using a combined mode) – start around 200–400W; higher wattage may overcook the exterior.
4. Set the timer – use the estimated cooking time (e.g., 40 minutes for a whole chicken in combined mode).
5. Press Start – the microwave and convection fan run simultaneously.
6. Check doneness – use a probe thermometer (chicken: 165°F internal) or a skewer test for cakes.

The internal link below leads to a curated roundup of top-rated models: our tested combination microwave recommendations cover models from Panasonic and Whirlpool with verified user feedback.

FAQs

Can I use metal cookware in a combination microwave?

Only on flatbed models designed for convection cooking—the metal rack that comes with the unit is safe, but standard metal bowls or pans are not. Always verify your model’s manual.

Does a combi microwave need a gas line?

No. Combi microwaves operate on standard electrical circuits, just like any countertop or built-in microwave. They do not require gas hookups, venting ducts, or special plumbing.

How much counter space does a combi microwave require?

Combi microwaves are no wider or taller than standard microwaves; they fit the same cabinet opening. The typical unit is about 450 mm high, roughly two-thirds the height of a standard single oven.