The standard installation of wood-burning cookers, thermo-cookers, stoves and thermo stoves considers that the comburent air is taken from the room where it is installed through its air entry. In this case, the room should always have fresh air ventilation, especially if it is small and there are airtight doors and windows. The room must have the right air supply also if there are other combustion-based devices, hoods, chimneys and airways. The air entry in the room must have a minimum area of 80 cm2. Upon request, Rizzoli can supply valves specifically designed to allow automatic opening of the air entry only when necessary, to guarantee maximum depression of 4 Pa in the installation room. If needed, Rizzoli products can also be installed with a connection outdoors to take the comburent air directly outside. Therefore, another air entry in the installation room would not be necessary for the wood-burning cookers and thermo-cookers: just install a duct connected outdoors and make a direct connection with the air entry on the product. In the wood-burning cookers and thermo-cookers it is located inside the plinth, where there is the combustion chamber.