Commercial deep fryers are large, restaurant-grade appliances designed to fry large batches of food at once. Industrial deep fryers are larger and more advanced than home deep fryers and are usually made of stainless steel or cast iron. They are usually heated with natural gas or propane.
Commercial fryers have various settings and features, such as timers, temperature controls, and a lift-out basket. Many commercial fryers are also designed with features to make cleaning easier, such as drop-down filters to collect dropped food and a drain to remove excess oil.