Apparatus and method for humidifying a material web

There are an apparatus and a method for humidifying a material web (2) provided with a supply means (3) for a moistening medium (9) and a nozzle assembly having at least one outlet nozzle (8) for the wetting medium, wherein between the supply means (3) and the nozzle arrangement (8) at least one distribution chamber (6) is arranged. One would like to improve the wet-up, especially with changing operating conditions. For this purpose, it is provided that the distribution chamber (6) with a Druckabsenkeinrichtung (12, 13) is connected.