Abstract: An air diffuser (10) is provided which includes a casing (12), a trim element (14) that is attachable to the casing (12) in a spaced configuration and a bracket (58) for attaching the trim element (14) to the casing (12). The bracket (58) includes first attachment formations (66) that are attachable to complemental formations (74) on the trim element (14) in a locking manner, and second attachment formations (68) that are attachable to complemental formations on the casing (12) in a releasably clipping manner. The diffuser (10) includes a control element (16) disposed between the casing (12) and the trim element (14) and a mechanism (38) for moving the control element (16) relative to the casing (12) and the trim element (14), wherein the mechanism (38) is fixedly attached to the trim element (14), between the trim element (14) and the control element (16).