Group for analysis and control of the ventilation of at least one internal environment or first environment, comprising: - a containment box or casing, - at least one first opening for introducing a fluid or air in an internal environment or first environment, - at least one second opening for suctioning or drawing a fluid or air from an external environment or second environment, - sensor or examination means for the fluid or air suctioned from said at least one second opening, wherein said sensor or examination means are arranged to detect the quality of air or the fluid suctioned from said at least one second opening or the presence as well as the value of compounds in the air or fluid suctioned from said at least one second opening, said containment box or casing delimiting at least one first path of fluid or air transmission or transfer from said at least one first opening to said at least one second opening, said group also comprising - first means for suctioning or thrusting fluid or air along said at least one first path set for conveying a fluid or air from said at least one first opening to said at least one second opening, and - at least one processing unit set to receive first data pertaining to the fluid or air of an external environment or second environment from said sensor or examination means, as well as examine said first data, so as to consequently drive said first means for suctioning or thrusting and/or means for actuating at least one valve (10a, 10b) of intercepting said first path as a function of the first examined data, in a manner such to regulate or allow/obstruct the flow of fluid or air through said at least one first path from said at least one first opening to said at least one second opening, said group further comprising at least one third opening for suctioning or drawing fluid or air from said at least one internal environment or first environment and sensor or examination means for the fluid or air suctioned from said at least one third opening, wherein said sensor or examination means are arranged to detect the quality of air or the fluid in the internal environment or suctioned from said at least one third opening or the presence as well as the value of compounds in the air or fluid in said internal environment or suctioned from said at least one third opening. said at least one processing unit being set to receive second data pertaining to the fluid or air of said at least one internal environment from said sensor means, as well as to examine said second data, so as to drive said first means for suctioning or thrusting and/or means for actuating at least one valve of intercepting said at least one first path as a function of said first and said second examined data, said group further comprising at least one fourth opening for expelling fluid or air into said external environment or second environment and second means for suctioning or thrusting fluid or air, wherein said containment box or casing delimits at least one second path for transmitting or transferring fluid or air from said at least one third opening to said at least one fourth opening, wherein said second suction or thrust means for suctioning or thrusting fluid or air are set to convey fluid or air from said at least one third opening to said at least one fourth opening, and wherein said at least one processing unit is set to drive said second means for suctioning or thrusting fluid or air and/or second means for actuating a valve of intercepting said at least one second path as a function of said examined data. - a containment box or casing, - at least one first opening for introducing a fluid or air in an internal environment or first environment, - at least one second opening for suctioning or drawing a fluid or air from an external environment or second environment, - sensor or examination means for the fluid or air suctioned from said at least one second opening, wherein said sensor or examination means are arranged to detect the quality of air or the fluid suctioned from said at least one second opening or the presence as well as the value of compounds in the air or fluid suctioned from said at least one second opening, said containment box or casing delimiting at least one first path of fluid or air transmission or transfer from said at least one first opening to said at least one second opening, said group also comprising - first means for suctioning or thrusting fluid or air along said at least one first path set for conveying a fluid or air from said at least one first opening to said at least one second opening, and - at least one processing unit set to receive first data pertaining to the fluid or air of an external environment or second environment from said sensor or examination means, as well as examine said first data, so as to consequently drive said first means for suctioning or thrusting and/or means for actuating at least one valve (10a, 10b) of intercepting said first path as a function of the first examined data, in a manner such to regulate or allow/obstruct the flow of fluid or air through said at least one first path from said at least one first opening to said at least one second opening,