Microwave, Convection and Multifunction Ovens: Making Sense of the Names
A microwave, a convection oven and a multifunction oven can look identical behind a cabinet door. They cook in very different ways. Here is how to tell them apart, and how to choose for the meals you actually make.
The microwave oven began with a melted chocolate bar. In the 1940s Percy Spencer, an engineer at Raytheon, was working near a radar set when he noticed the snack in his pocket had turned to goo. The first commercial version, the Radarange, stood nearly six feet tall and weighed more than 340 kilograms. Today’s built-in models slot neatly into kitchen cabinets, sit beside ovens with a dozen settings, and share a vocabulary that confuses almost everyone.
The fix is to pull the labels apart. “Microwave” names a way of heating. “Convection” means a fan moving hot air. “Multifunction” simply means the oven offers a choice of heating modes. “Built-in” says nothing about cooking at all; it describes how the appliance is fitted. Once you see them as four separate ideas, the product names stop sounding like a riddle and start reading like a shopping list.
The short version
Microwave is a heating method. Convection is hot air moved by a fan. Multifunction is a menu of oven modes. Read the function list, not the name.
At a glance
Type
How it heats
Worth checking
Microwave
Microwave energy heats the food itself
Capacity, power levels, safe containers
Convection oven
A fan moves heated air around the cavity
Usable shelf space and the modes included
Multifunction oven
A menu of heating modes, from grill to fan
Which modes you will really use
Combination microwave
Microwave plus grill or hot air
Which modes run together, and the accessories
In this article
What each word really means
A microwave oven fills its cavity with microwave energy, which heats the water in food. It is fast, but it only reaches a short way in. Food-safety specialists at the University of Nebraska-Lincoln put the depth at roughly 2.5 to 4 centimetres; beyond that, heat travels inward the slow way, by conduction. That is why a thick lasagne can be scalding at the edges and cold in the middle, and why instructions ask you to stir, turn and let food stand for a few minutes before eating.
A grill is different again: a hot element above the food, browning whatever it can see. A convection oven uses a fan to push heated air around the cavity so the heat reaches every side of a tray. Put two of these in one box and you have a combination appliance, but the parts do not merge. A microwave with a grill is not a convection oven, however many buttons it has.
So start with the job. If you want to bake a birthday cake for twelve, look at the baking modes and the usable cavity. If you mostly want to warm last night’s curry without giving up worktop space, a built-in microwave may be all you need. Buy the capability, not the longest-sounding name.
Multifunction: a menu, not a promise
“Multifunction” tells you there is a choice of heating arrangements. It does not tell you which ones. A typical menu might include top and bottom heat, a fan mode, a grill and perhaps a pizza or defrost setting, but the mix changes from model to model. The word never implies a microwave. If you want one, look for it by name in the specification.
Newmatic lists its built-in electric ovens and its built-in microwaves as separate families. Some of the electric ovens offer a long list of functions, and the top model adds an air-fry mode. Check the function list and accessories for the exact model rather than assuming every oven in the range shares them.
In the showroom, ask someone to talk you through three dishes you cook often: a roast chicken, a tray of vegetables, a sponge. Which setting would they pick for each, and why? If the symbols still mean nothing after that conversation, the extra modes will probably go unused. A few settings you understand beat a dozen you ignore.
Start with a week of meals
Before looking at a single brochure, write down an honest week of cooking. Include the leftovers, the late nights and the Saturday bake. Someone who reheats lunch every day and bakes twice a year has a very different brief from a keen baker who only needs to warm milk. The list tells you which features you will use and which merely look good in a demonstration.
Then think about timing. If a chicken is roasting at six in the evening, can someone else heat a bowl of soup at the same moment? Two appliances make that easy. One cavity does not. For a household of one or two, a good combination unit may give all the flexibility needed, provided its size and modes fit the meals on your list.
Measure your biggest regular dish, handles included. The litre figure on a spec sheet will not tell you whether your roasting tin fits with room for air to move around it. Take the tin, or its measurements, to the showroom and try it in a display model. The width of the appliance is no promise about the space inside.
Two appliances, two jobs
A built-in oven with a separate microwave gives you two cooking spaces that work independently. One person can bake while another reheats, and each appliance can be chosen for its main task. The microwave earns its place on small jobs: in trials reported by the UK’s Microwave Association, a 900-watt microwave cooked a dish using roughly a quarter of the electricity a fan oven needed once preheating was counted.
The trade-off is space, plus two sets of installation requirements. A tall tower of matching appliances looks smart, but height matters. The National Kitchen and Bath Association in the United States suggests placing a microwave between about 60 and 120 centimetres off the floor, well below eye level. Nobody should be lifting a bowl of hot soup down from above their shoulders.
Think about the long run, too. Ask whether each appliance can be removed on its own and how a replacement would fit the same opening in years to come. Matching finishes are lovely, but independence is what counts on the day one appliance needs a service and the other does not.
One cavity, many tricks
A combination microwave with true convection can make sense when cabinet space is tight and the cooking is modest. It can reheat, grill and bake small dishes from one spot. The key word is true: confirm in the specification and manual that it has a heating element and fan for hot-air cooking, not just a microwave and a grill.
Test it against a real meal. A compact combination unit suits a household that reheats and bakes at different times of day. It is less comfortable when someone wants the microwave while the same cavity is busy with a gratin. Check the usable capacity, how quickly it switches between modes and how easy the controls are to read with your own portions in mind.
Ask the practical questions. How long does a typical bake take? Does it need preheating? Which rack or tray comes with it, and which modes can run together? None of these is a reason to avoid a combination appliance. They are simply the price of saving space, and it helps to know the price before you pay it.
Fans, air fry and the crisp you want
A fan changes how heat moves around food, but the size of the cavity, the elements and the programme all shape the result. A fan oven, a countertop air fryer and an oven’s air-fry setting are cousins, not twins. Compare them by the portion you cook and the finish you want.
For a family tray of roast potatoes, a full-size oven’s shelf space is hard to beat. For a handful of chips at midnight, a small appliance gets going faster. If you hope an oven with an air-fry mode will let you clear a gadget off the counter, ask which accessory it needs and whether you will really fire up the main oven for small snacks.
Follow the recipe’s stated oven type and the appliance’s own guidance rather than a conversion you once read online. Some ovens suggest temperatures for each mode; others leave it to you. For the first few weeks, jot down the mode, shelf and result each time. It is the quickest way to learn a new oven’s habits.
Fit the cabinet to the appliance
Built-in appliances are designed for a specific opening and a specific route for warm air to escape. Your cabinet maker needs the installation drawing for the exact model, not a photo or a headline width. Confirm height, depth, support and ventilation before anything is cut. And a countertop microwave should never be boxed into a cupboard unless its maker says that is allowed.
Plan where hot dishes will land. Picture opening the oven with a heavy casserole in both hands, then setting it down on a heat-safe surface without crossing anyone’s path. Try the movement with an empty dish while looking at the plan. Awkward distances show up far more clearly in your arms than on a tidy elevation drawing.
Bring the electrician in early. Each appliance needs a suitable supply, and the home’s total load has to add up. Keep sockets, isolators and access panels where the instructions say they should be. A neat tower of appliances still has to come out for servicing one day.
Mind the dish
A dish that is fine in a conventional oven is not automatically safe in a microwave, and a microwave-safe bowl is not automatically ovenproof. In a combination appliance this matters more, because the rules change with the mode. Check the cookware guidance for the setting you are using, including whether microwave energy is switched on.
Unsure about an unlabelled container? University of Nebraska-Lincoln extension staff suggest a simple test: microwave it beside a cup of water for one minute. If the container comes out warm, keep it out of the microwave. Metal racks supplied by the manufacturer may be allowed in certain modes, but that does not make your favourite roasting tin fair game.
Storage makes the rules easier to follow. Keep oven trays near the oven, microwave-safe dishes where they are easy to spot, and trivets beside the landing space. When the right dish is closest to hand, nobody grabs the wrong one in a hurry.
Take your cooking to the showroom
Bring three dishes you cook often, their measurements and a rough sketch of the cabinet. Ask for a demonstration of the controls and the door. Can you read the display from where you normally stand? Does the cavity look easy to wipe? Small things like these decide how much you enjoy an appliance long after the novelty of its mode list has worn off.
Does multifunction mean a microwave and oven in one?
No. It means a choice of oven modes. If you want microwave cooking, look for the word “microwave” in the specification. A long programme list, or the word “versatile”, is not the same thing.
Can a microwave with a grill replace my oven?
Not usually. A grill browns from above; baking needs an oven mode and a cavity that suit the food. A grill is not convection either, so check what the appliance can actually do and test it with the dishes you make.
So which set-up should I choose?
Go for two appliances if you often cook and reheat at the same time and have the space. Consider a combination unit when cabinets are tight and portions are small. Either way, browse Newmatic’s built-in ovens and microwaves with your meal list in hand, or take it to a showroom and let the functions make the decision.
