Restaurants that need a microwave will have to purchase a commercial microwave, as most insurance policies will not cover residential models. Commercial microwave ovens are available in heavy-duty, light-duty and steam models that have various features designed to suit a kitchen's specific needs. Heavy-duty commercial microwaves use more power, cook or reheat foods faster, have all stainless steel exteriors and have several programmable features. These units are ideal for operations that reheat a lot of different food items. Light-duty microwaves are ideal for establishments that do not have a lot of space and only reheat or warm small amounts of food throughout the day. These smaller models use less power than heavy-duty models, may or may not have a stainless steel exterior and have more basic programming options than their heavy-duty counterparts.