A washer-dryer is provided with at least one condenser for condensing moisture-laden air exiting the laundry during a drying cycle. The washer-dryer includes a washing tub (10) comprising a cylindrical lateral wall (12) and a rear wall (14) and a rotatable laundry drum (24) arranged or arrangeable inside the washing tub (10). An inlet (20) of the condenser is arranged at or connected to the rear wall of the washing tub (10). An outlet of the condenser is connected to the washing tub (10). The rear wall (14) of the washing tub (10) comprises a duct (18) fluidly connected to the inlet (20) of the condenser, so that the air stream from the laundry drum (24) to the inlet (20) of the condenser passes the duct (18). At least one sensor (22) is arranged inside the duct (18).