An aluminium production electrolytic cell (4) comprises a bath (8) with bath contents (8a), at least one cathode electrode (10) in contact with said contents (8a), at least one anode electrode (6) in contact with said contents (8a), and a hood (16), defining interior area (16a), covering at least a portion of said bath (8). The electrolytic cell (4) is equipped for vent gases to be drawn from said interior area (16a). The electrolytic cell (4) also comprises at least one heat exchanger (52) for cooling at least a portion of the vent gases drawn from interior area (16a), prior to circulation thereof to interior area (16a).