Many companies sell combination wall ovens and microwaves, such as Frigidaire, Maytag, GE and KitchenAid. The Home Depot's official online store lists five different brands of wall oven and microwave combinations, while Best Buy offers four different brands.
Wall oven and microwave combination appliances are sold by most companies that also sell other kitchen accessories of a similar type. These appliances are priced in the range of several thousands of dollars, making them a great deal more expensive than traditional ovens or microwaves sold individually.
Some wall oven and microwave combinations come with features that may not be found in the models of rival brands. Whirlpool and GE offer models that have a steam-cleaning function for cleaning up light spills by heating up a small amount of water to soften the mess. Frigidaire offers a machine that has a larger-than-average microwave component for cooking larger meals.
Most wall oven and microwave combination appliances, however, have consistent features, such as convection calculation and a rotating heating plate for the microwave component. After considering the features, the lowest-priced appliances available on a website such as Lowes.com as of 2015 is the Frigidaire self-cleaning wall oven and microwave combination, at both the 27-inch and 30-inch sizes.