Features The ovens are Composed of detachable deckseasy to install site. Doors with windows open down to access baking chamber. Individual steam systems on each deck operate independently. Light and timer standard on each deck. Easy maintenance baking chamber. Stainless steel frame, bottom-placed proofer and top-placed convection oven are options. Optional Accessories:steam device, exhausting hood,stone bottom. Easy to use digital controls for temperature, steam time, and top and bottom heat controls for each individual deck. SM-523 with damper key. Casters.