Ventilated hob comprising a motor-driven fan (V) adapted to provide high pressure air to two or more burners (BRNi) thereof, each of said two or more burners (BRNi) at least comprising: - means (VG, 211; 211.a, 211.b) for supplying and regulating the flow of fuel gas (Q GAS ) in input into each of said two or more burners (BRNi) and supplied by a gas channel , said means (VG, 211; 211.a, 211.b) comprising at least one gas injector (211; 211.a, 211.b), - means (VP; 101; UG) for supplying the flow of combustion air (Q AIR ) in input into each of said two or more burners (BRNi), said combustion air, supplied from a sealed circuit (CA1, 405, 407), being capable of mixing with said fuel gas, - an electronic unit (CMD) for controlling said air flow (Q AIR ), characterised in that the electronic unit is set so that said air flow (Q AIR ) varies as a function of said flow of fuel gas (Q GAS ) in input into each of said two or more burners (BRNi) so as to ensure a gas-air mixture with a stoichiometric or substantially stoichiometric ratio without the need of input of secondary air from the outside, said variation of said air flow (Q AIR ) being obtained by varying the pressure of the combustion air in said sealed circuit (CA1, 405, 407) inside said hob , said fan (V) being set to regulate its rotation speed to determine the required air pressure, said regulation of the air flow (Q AIR ) being called "centralised", and further characterised in that said control unit (CMD): - is set to detect the configuration of simultaneously active burners (BRNi), - is set to detect the opening (α i ) degrees of the gas valves (VG) of each of said active burners (BRNi), each of said opening (α i ) degrees corresponding to a specific operating pressure (DPα i ) which also takes into account the characteristic curves of said means (VP; 101; UG) for supplying the said flow of combustion air (Q AIR ), said means (VP; 101; UG) consisting of at least one air nozzle (UG) with calibrated and fixed opening, is set to determine an operating pressure (DP act ) intermediate to the single pressures (DPα i ) that each active burner (BRNi) should have, said intermediate operating pressure (DP act ) univocally corresponding to a rotation speed (n act ) of said fan (V), said intermediate pressure (DP act ) being determined through "mappings", loaded into memory means of said control unit (CMD), of all possible combinations (C) of simultaneously active burners (BRNi) according to all their possible power levels. - means (VG, 211; 211.a, 211.b) for supplying and regulating the flow of fuel gas (Q GAS ) in input into each of said two or more burners (BRNi) and supplied by a gas channel , said means (VG, 211; 211.a, 211.b) comprising at least one gas injector (211; 211.a, 211.b), - means (VP; 101; UG) for supplying the flow of combustion air (Q AIR ) in input into each of said two or more burners (BRNi), said combustion air, supplied from a sealed circuit (CA1, 405, 407), being capable of mixing with said fuel gas, - an electronic unit (CMD) for controlling said air flow (Q AIR ), - is set to detect the configuration of simultaneously active burners (BRNi), - is set to detect the opening (α i ) degrees of the gas valves (VG) of each of said active burners (BRNi), each of said opening (α i ) degrees corresponding to a specific operating pressure (DPα i ) which also takes into account the characteristic curves of said means (VP; 101; UG) for supplying the said flow of combustion air (Q AIR ), said means (VP; 101; UG) consisting of at least one air nozzle (UG) with calibrated and fixed opening, <EOS>