By the blower, the air flows in the humidifier. The humidification not-manoeuvrable water is removed from the drinking water network. The humidifier consists of a water bath at about 60 liters of water (W), spray nozzles (S) and a packed bed (R). The water may be by electrical cons-standing heaters (H1) with a maximum power of 31 kW and a refrigerating machine (K, 8 kW) between 4 ° C and 75 ° C temperature-who-the. It is drawn in a first circuit through Pu1 from the bath and conveyed back into either the spray nozzles or via a branch line directly into the water. The direct return of this partial flow results in better circulation in the water bath. In a second cycle, the water sucked (Pu2) is passed through the heat exchanger of Kältema-machine (K) and returned directly into the water