A method for distributing the ventilation air blown towards the rooms of a dwelling or extracted therefrom through a distribution network comprising distribution ducts, said method using one or several room ventilation request sensors disposed in at least one room and using a pressure sensor, this pressure sensor being installed so as to measure the pressure in a blowing common section, when the method is applied to the blown air or being installed so as to measure the pressure in an extraction common section, when the method is applied to the extracted air and said method using controllable regulation valves to modulate the distributed air, characterized in that the conveying of air is carried out at a minimum pressure Pm in the common section determined from the room ventilation request sensors and from the aeraulic parameters of the distribution network, the method comprising: - a first step of acquiring room ventilation request information by at least one of the room ventilation request sensors and of converting into requests of air flow rate Q n , associated with each distribution duct, - a second step of calculating for each of the n ventilation air distribution ducts, a pressure Ps n , when air is blown or Pe n , when air is extracted, that is required in the common section to ensure the requested air flow rate Q n , in each distribution duct, by considering the regulation valve in the maximum open position and taking into account the pressure drop coefficients Kt n , due to the pressure drops on the air pathway in the respective distribution ducts, - a third step of determining the maximum pressure Pm from among the air pressure calculated values Ps n , or Pe n , said value Pm being the minimum pressure which satisfies the ventilation needs of all rooms, and - a fourth step of calculating the opening positions α n , for each regulation valve making it possible to obtain an air flow rate adjusted in each distribution duct as a function of the pressure Pm, of the requested air flow rate Q n , and of the pressure drop coefficient Kt n , on the air pathway in each distribution duct, the opening position information being transmitted to the regulation valves. - a first step of acquiring room ventilation request information by at least one of the room ventilation request sensors and of converting into requests of air flow rate Q n , associated with each distribution duct, - a second step of calculating for each of the n ventilation air distribution ducts, a pressure Ps n , when air is blown or Pe n , when air is extracted, that is required in the common section to ensure the requested air flow rate Q n , in each distribution duct, by considering the regulation valve in the maximum open position and taking into account the pressure drop coefficients Kt n , due to the pressure drops on the air pathway in the respective distribution ducts, - a third step of determining the maximum pressure Pm from among the air pressure calculated values Ps n , or Pe n , said value Pm being the minimum pressure which satisfies the ventilation needs of all rooms, and - a fourth step of calculating the opening positions α n , for each regulation valve making it possible to obtain an air flow rate adjusted in each distribution duct as a function of the pressure Pm, of the requested air flow rate Q n , and of the pressure drop coefficient Kt n , on the air pathway in each distribution duct, the opening position information being transmitted to the regulation valves. <EOS>