Abstract: A surface treatment apparatus may include a surface cleaning head having an agitator, an agitator motor configured to cause the agitator to rotate, a suction motor configured to cause debris to be drawn from a surface to be treated, a debris sensor configured to generate a signal indicative of an amount of debris in a dirty air path, a user interface (UI), and a controller. The controller can be configured to receive the signal indicative of the amount of the debris in the dirty air path, adjust a rotation speed of at least one of the suction motor or the agitator motor, and adjust the UI based on the rotation speed of at least one of the suction motor or the agitator motor.

Abstract: An agitator for a vacuum cleaner includes an agitator body and a resiliently deformable flap. The resiliently deformable flap includes a front face, a rear face, and one or more protrusions extending outwardly from the front face. An agitator for a vacuum cleaner includes an agitator body and a bristle strip and/or a plurality of tufts arranged in one or more rows along the agitator body. The bristle strip and/or a plurality of tufts includes a first bristle group including a plurality of nylon bristles and at least a second bristle group including a plurality of para-aramid bristles.