<p>A floor tool for a surface treating appliance includes a main body having a suction opening, and a conduit connected to the main body for conveying an air flow from the main body to an air outlet. To reduce turbulence generated during the passage of an air flow along the flow path, a plurality of apertures is formed in at least one of the main body and the conduit. The apertures are open to the atmosphere to introduce air into a flow path extending from the suction opening to the air outlet, thereby disrupting the growth of the boundary layer in the air flow flowing along the flow path and inhibiting the transition to turbulent air flow within the boundary layer.</p>
