Commercial microwaves are designed to be used in a commercial setting, such as a restaurant. Sharp offers several commercial models, which have certain notable differences from standard home microwaves. First, they're built to last, since an average household might use the microwave once or twice a day, while a restaurant might use it a hundred times a day. Commercial models tend to have a simple dial timer rather than digital controls, which may fail with heavy use, and a flatbed interior rather than a carousel, since it's easier to clean and is one less thing that could potentially break.