An air-conditioning unit for air-conditioning an air flow may include a multipart housing including a first housing part and a second housing part arranged on top of the first housing part. The housing may further include an air-conditioning segment and a blower segment defining an axis of rotation. The blower segment may have a blower for driving the air flow. A suction chamber and a pressure chamber may be disposed in the blower segment, and the suction chamber and the pressure chamber may be open with respect to one another via a connecting opening. The blower may have an impeller arranged in the connecting opening. The impeller may include a suction side facing towards the suction chamber and a pressure side facing towards the pressure chamber. The housing may further include a connecting duct for fluidically connecting the blower segment to the air-conditioning segment.