Abstract: According to an example aspect of the present invention, there is provided a duct cleaning apparatus comprising a frame, a coil carriage which is coupled to the frame and configured to rotate around an axis of rotation, a shaft with a first end and a second end, wherein the shaft is configured to rotate within a guide wire cable, a cleaning tool which is connected to the shaft at the first end of the shaft, a drive unit coupled to the second end of the shaft via a gear, and wherein the drive unit, the gear, control electronics and at least one battery are located within the coil carriage.

Abstract: The present invention concerns an arrangement for cleaning ducts and chimneys, such as air conditioning ducts. The arrangement comprises a guide wire cable having a cleaning end and a feed end, a brush or some other tool being connected to the cleaning end of the guide wire cable, and a drive unit connected to the feed end of the guide wire cable, the arrangement further comprising transmission means for moving the brush by means of the drive unit. According to the invention the drive unit comprises a hydraulic pump, the transmission means are provided by hydraulic pipes arranged inside the guide wire cable, and the primary drive unit for the brush being a hydraulic motor connected to the cleaning end of the guide wire cable.