Ventilation systems and methods are provided. A method for operating a ventilation system includes receiving a fan speed of a first fan of a range appliance, the first fan operable to flow air through a first conduit of an air curtain assembly of the range appliance, the first conduit defined in a cabinet of the range appliance. The method further includes determining a corresponding fan speed for a second fan, the second fan operable to flow air through a second conduit of a vent appliance. The method further includes outputting the corresponding fan speed to the second fan. The corresponding fan speed for the second fan is correlated with the fan speed of the first fan such that a volumetric flow rate through the second conduit is greater than or equal to a volumetric flow rate through the first conduit.