A liquid soap, as defined by 21 C. The ventilation assembly includes a vent structure having a mounting portion securing the vent structure to the building over the opening. In particular the system is self-adapting to adjust the torque moment depending upon the motion, the extent of inclination, and the surface topography. The programmable element is capable of comparing the external reference signal with the rotational speed of the rotor and, consequently, controls the rotor circuitry based upon the comparison of the external reference signal and the rotational speed of the rotor. The inventive device is characterized by having at least one flow guiding means for guiding the waste water inside the tank in an essentially meandering manner, and by having at least one heating means inside the tank for regulating a predetermined temperature. The method includes processing the IP multicast packet using the bridging functionality and the routing functionality implemented by each of the MLAG peers to process the IP multicast packets.