Control method for a ventilation device with ventilation device

In a ventilation device for installation in a thermal envelope (1, 2) where the ventilation device (4) is adapted to exchange of air flows between the building exterior (A) and indoor (1) to promote, namely a first, in the building interior (I) into the leading Luftaustauchstrom (76, 77) and a second, out of the building interior (I) also leading air exchange current (78, 79), wherein the ventilation device (4) further comprises: a heat exchanger (3) for heat transfer between the exchange of air flows (76-79), a current measuring device (7) which is a current signal for the size of the exchange of air flows (76, 77; 78, 79) emits a Innenfeuchtemeseinrichtung (80) an internal humidity signal for relative humidity of the air inside the building (I) emits a CO2 measuring means (81) which emits a signal for a CO2 CO2 content of the air inside the building, an input device (74) on which a user specifications for can make an operation of the ventilation device (4), and control means (75), the current signal, an indoor humidity signal and CO2 signal receiving is connected to said input means (74) and the exchange of air flows on the basis of the requirements and the signals (76-79) setting, it is provided that the input means (74) for presetting a comfort parameter (C), the control means (75) starting from the setting of the comfort parameter (C) deviation requirements for at least the relative humidity of the air inside the building (1) and the determined CO2 content of the air inside the building (I) and controls the operation of the ventilation device (4), wherein said current signal are used as control variables and the CO2 and indoor humidity signals as controlled variables as a measured variable, the exchange of air currents which are controlled taking into account the deviation specifications, and wherein the deviation requirements in particular, include upper and lower limits.