Abstract: Wake-up apparatus includes an elongated hose having a funnel member at one end for coupling to the output side of a room air conditioner and a horizontally elongated rectangular outlet on the other end for placement on a mattress for directing air therealong. A rotatable damper vane mounted in the hose is controlled by a motor energized via an electric timer for driving the vane to an open position at a predetermined time for causing a blast of cold air along the mattress.