The oven has a stated capacity of 72 l and a net volume of 41 litres, indicating the usable space in the cavity. Usable cavity space dimensions are 214x462x397 mm.

There are 20 cooking functions, including traditional modes such as Static, Fan assisted, Ciculaire, Turbo, ECO, Large grill, Fan grill, Base, Circulaire + bottom and Pizza, alongside pulsed steam and full steam functions such as Manual steam, Steam + elements and fan, Warming and re-generation and Sous Vide, plus additional functions like Defrost, Proving, Stone cooking, BBQ, Air-Fry, Keep warm and Sabbath.

The Fill&Hide system conceals the water loading elements to enhance aesthetics. The loading and unloading tube can be removed easily so water can be refilled at any time during the cooking cycle without opening the door, helping to ensure continuous steam generation from the 2 l tank.

The oven uses the Vapor Clean function, which employs steam to loosen deposits in the cavity. The easy clean enamel interior has an antacid lining to reduce grease adherence. The descaling function removes excess limestone from the tank, and tank cleaning is suggested roughly every 2–3 months. The all glass inner door and removable inner glass facilitate cleaning of the door area.

The SMEG SO4104S4PG has an A++ energy efficiency class. Energy consumption per cycle in conventional mode is 0,80 kWh (2,88 MJ), and in fan-forced convection is 0,44 kWh (1,58 MJ). The energy efficiency index is 61,1 %.

Yes. There is a dedicated Sous Vide steam function for vacuum cooking at controlled temperatures. Air-Fry is available as a function and via compatible AIRFRY and AIRFRY2 accessories, which allow traditional-style frying in the oven with fewer calories and less fat, suitable for foods such as French fries, fried vegetables and fish.