A turbo brush for cleaning a surface comprises a housing having an upper surface, a lower surface, a front end and a rear end, the lower end having a dirty air inlet. A primary air flow path extends from the dirty air inlet to a dirty air outlet. A rotary brush is associated with the dirty air inlet and extends transverse to a forward direction of movement of the turbo brush. A drive mechanism comprises an air driven turbine, a drive gear drivingly connected to the rotary brush and a worm gear directly drivingly connecting the air driven turbine and the drive gear.