There are three types of oven, conventional ovens, fan assisted ovens and microwave ovens.
1/ In conventional ovens, heating elements are located at the top and at the bottom of the oven. They are suitable for general cooking.
2/ With fan assisted ovens, there are two types single fan assisted ovens and multi-functional fan ovens. They spread the heat more evenly more evenly through the oven that conventional ovens. If you are using more than one shelf for cooking a fan assisted oven is preferred to a conventional oven.
3/ Microwave ovens, combine microwave cooking with conventional oven cooking. This makes cooking times quicker.
Special features to consider are telescopic shelving that makes access easier.
Energy efficient ovens, eco-ovens, with timers that switch the heat off close to finishing cooking. The heat in the oven finishes off the last bit of cooking.
There’s the location of your oven to consider too. Do you want it high at eye level, no bending or hunkering down or located under the hob or range, its more traditional location. If it’s built in to your kitchen cupboards it will save you space. Kitchen appliances continued.