Abstract: An apparatus for collection and removal of gases emitted by an aluminum reduction cell is formed within an anode superstructure having two sidewalls spaced from each other. At least one gas transmitting channel having varying cross-section extends along the superstructure toward an end thereof associated with a gas treatment system. A plurality of gas input sections are provided within the superstructure and formed by a pair of spaced from each other members extending transversely to said sidewalls. At least one nozzle is formed at an interface between the gas transmitting channel and the respected gas input section. The ratio of cross-section area of the nozzle at an outlet thereof to a cross-section area of the gas transmitting channel and the output of the nozzle decreases in the direction of the end of the gas transmitting channel associated with the gas treatment system.