A device includes a heating body and a steam-chamber head which form the housing for a steam chamber. The inside walls of the heating body and of the steam-chamber head form an annular steam chamber. An impeller is disposed in the steam chamber as a rotary component. Via a feed supply line, water is supplied to the steam chamber in the vicinity of the vanes of the impeller. By way of the rapidly rotating impeller, the water is atomized into tiny droplets and reaches the hot wall of the steam chamber, where the droplets are vaporized. Good heat transmission and quick evaporation are made possible, i.e., a large amount of steam can reach the consuming appliance via a steam connection within a short time. The scale deposited can easily be removed.