Microwave vs Combi Oven for a Commercial Kitchen: Which Do You Actually Need?

Two of the most common oven questions in a commercial kitchen are really the same question: "do I need a microwave, a combi oven, or both?" They look similar from the outside — a box that heats food — but they do completely different jobs, and buying the wrong one leaves a gap in your kitchen.

This guide covers what each actually does, the volumes and menus each suits, and when a kitchen genuinely needs both.

What a commercial microwave actually does

A commercial microwave reheats and finishes food fast. That's its job: speed. It heats by exciting water molecules throughout the food, so it's near-instant for reheating plated dishes, sauces, soups and pre-cooked items.

What it does not do: brown, crisp, roast or bake. A microwave can't give you a crust, a roast, or a baked good. If a dish needs colour or texture, a microwave alone can't deliver it.

A commercial microwave makes sense when you need to: - Reheat plated dishes to order in seconds. - Finish or reheat sauces, soups and sides fast. - Turn around a high volume of pre-prepared items quickly.

What a combi oven actually does

A combi (combination) oven cooks with dry heat, steam, or both together. That combination is what makes it the workhorse of a professional kitchen:

• Steam mode — poaching, steaming vegetables, rice, fish; gentle, moist cooking.
• Convection (dry heat) mode — roasting, baking, browning; the fan gives even, consistent results across multiple trays.
• Combi mode (steam + dry heat together) — roast meats that stay juicy inside and brown outside; bakery items with a crust and a soft crumb; regeneration of chilled dishes without drying them out.

A combi oven roasts, bakes, steams, regenerates and holds — it's the closest thing to a single box that replaces several appliances. What it's not is fast: a combi cooks properly, not instantly.

The honest comparison

• Speed: microwave wins — seconds, not minutes.
• Cooking quality: combi wins — it actually cooks, browns and crisps.
• Versatility: combi wins — one box, many methods.
• Footprint and simplicity: microwave wins — small, cheap to run, anyone can use it.
• Volume cooking: combi wins — multiple trays at once, consistent results.

A microwave is a speed tool. A combi is a cooking tool. They answer different questions.

When you need both

Many professional kitchens run both, because they cover opposite ends of the job:

• Combi for the actual cooking — roasting, baking, steaming, regenerating.
• Microwave for the speed work — reheating a plated dish to order, warming a sauce, finishing a side in seconds during service.

If you cook from raw and serve volume, the combi is the priority. If you mostly reheat and finish pre-prepared food fast, the microwave carries the load. A busy full-menu kitchen often needs both.

Frequently asked questions

Can a combi oven replace a microwave?

Not for speed. A combi regenerates and cooks well but it doesn't reheat a plated dish in seconds the way a microwave does. If fast reheat-to-order is central to your service, you still want a microwave alongside.

Can a microwave replace a combi oven?

No. A microwave can't roast, bake, brown or steam. If your menu needs any of those — a crust, a roast, a baked good, steamed vegetables — a microwave alone can't deliver it.

Which should a small kitchen buy first?

Match it to your menu. A kitchen built around reheating and finishing pre-prepared food gets more from a microwave. A kitchen cooking from raw — roasting, baking, steaming — needs the combi. Many small kitchens eventually run both because the two cover opposite ends of the job.

Do combi ovens need special installation?

Yes — combi ovens typically need a water supply and drainage for the steam function, adequate power or gas, and extraction for the heat and steam they produce. Some functions also need power for fans and controls even on gas models. Confirm the services with your installer before you buy.