Some of the higher-end models even have the ability to cook with convection heat, so now meals can be browned without having to move it to a conventional oven before serving. In order to prevent sewer gasses and odors from entering the house, plumbing drains have devices called traps installed. It is very important that a drain pipe have a trap installed in order to prevent sewer gasses from entering the house's breathable airspace. The range is similar to the cook top in that it has either electric elements or gas burners mounted on the surface that is used for cooking. The difference between a range and a cook top is that the range is a combination, stand-alone unit housing a cook top and an oven.
Ranges are usually either electric or gas-operated.
Refrigerator top Refrigerators come in all different shapes and sizes. The standard shape is a vertical standing unit. Some units have just the refrigeration section while others have an integral freezer. Many refrigerators include amenities such as ice makers and automatic ice and water dispensers on the doors. On the models that have integral freezers, the freezer can be located at the top of the unit or it can be installed on one side of the refrigerator, with vertical doors.