A wet scrubber (1) having low energy demand, in other words having reduced flow resistance, comprises a demister (5), the filter package (25) of which is corrugated or folded together. Thus, a large surface is provided in order to ensure reliable moisture penetration of the incoming dust. Additional advantages are a suitable bottom plate (15) in the demister sub-housing (4), specially arranged and designed wetting nozzles (6, 7), and above all a sub-division of the demister (5) into several complete packages (31, 33).