The invention relates to an improved climate control system in which a climate controlling equipment (1) has a control line (2) arranged to be connected to climate influenced impedance means (3). According to the invention, relay means (4) are arranged to disconnect the climate influenced impedance means from the control line under influence from an output (5) of a control unit (6) and to instead connect substituting means (7) providing an impedance controlled by a second output (8) of the control unit. The latter is connected to a processor (9) arranged to receive information from a plurality of climate influenced information means (10, 11, 12) and to process the same in a mathematical model for controlling the impedance of the substituting means via the control unit.