The efficient, two-step system comprising of a pre-filter and a PTFE-coated flat pleated filter for dust classes L and M ensures dust-free working, while its low operating noise of just 56 dB(A) also allows for use in noise-sensitive areas. The main sweeper roller can be precisely adjusted to the type of carpet in question. This reduce wear on the rollers, effectively prevents damage to the carpet, and makes it possible to clean almost every kind of carpet.