A convection oven uses a fan which is usually located on the back side of the oven. The purpose of the fan is to force the heated air inside of the oven and circulate it around the item being cooked. The heated air is constantly pushed over and around the food, therefore a convection oven cooks food much faster than a conventional oven.
Not only does a convection oven cook food more quickly than a conventional oven, but it can also thoroughly cook food at lower temperatures. The average amount of time saved when cooking with a convection oven is about 20 percent of the foods normal cooking time. The temperature a convection oven uses to cook food is also about 20 percent lower than a recipes suggested cooking temperature.
Typically, convection ovens are known for their popularity in the restaurant industry as well as in commercial cooking facilities. However, it is becoming more popular for individuals to own convection ovens in their homes or at least a conventional oven that can switch to a convection mode upon request.
Convection ovens are speedier and more efficient than conventional ovens, and therefore may be more expensive. However, professional chefs from around the world swear by them and rely on them for delicious tasting food. Also, since the air circulation in a convention oven is the same throughout, food will cook at the same rate no matter where it is placed in the oven on the top or bottom rack or near the front or back.