Abstract: The present invention relates in part to a cyclonic separator type central vacuum cleaner assembly comprising four mutually detachable sub-assemblies, including:(a) a first sub-assembly comprising a vacuum motor/exhaust housing having at one end thereof an opening through which air is drawn into the housing by the operation of the vacuum motor;(b) a second, mid-section, sub-assembly comprising a housing which is adapted to be secured to means for supporting the vacuum cleaner assembly as installed, and a vacuum cleaner inlet adapted to be secured to a system of dust collecting ductwork;(c) a third sub-assembly comprising a dust collecting housing for receiving and holding dust released from a cyclonic airflow during the operation of the vacuum cleaner assembly; and,(d) a fourth sub-assembly comprising a base plate adapted to be secured in removably fixed relation between said first sub-assembly and the second sub-assembly and having an aperture therein for permitting the flow of air between the first and seco