A fan assembly (202) for generating an air flow within a room includes an impeller (22) and a motor (26) for driving the impeller to draw an air flow into the fan assembly, and a casing having an interior passage (202) with a scroll section having a cross-sectional area that decreases from a scroll inlet section (234) to a scroll outlet section (236). The scroll inlet section has an inlet port (238) for receiving the air flow and the scroll outlet section (236) has an outlet port (240) for returning a first portion of the air flow to the scroll inlet section (234). The scroll section includes an air outlet for emitting a second portion of the air flow from the casing. The casing defines a bore (222)through which air from outside the fan assembly is drawn by the air emitted from the air outlet (208).