The present invention relates to a CPAP system for delivery of a flow of breathable gas at a continuously positive pressure in a range of about 2-30 cmH2O to a patient for treatment of sleep disordered breathing, the CPAP system comprising a patient interface including a sealing arrangement adapted to form a seal with a patient's nose and/or mouth, and a PAP device including a casing adapted to fit on top of a patient's head in use, the casing including a wall structure defining a casing interior, and a blower structured to generate the flow of breathable gas at the continuously positive pressure in the range of about 2-30 cmH2O, the blower including a housing and an outlet tube extending outwardly from the housing, the outlet tube structured to direct the flow of breathable gas exiting the blower, wherein the blower and outlet tube thereof is enclosed within the wall structure of the casing, wherein the outlet tube of the PAP device is in fluid communication with the patient interface, and the outlet tube of the PAP device is angled and/or curved along its length towards a lower wall of the wall structure of the casing so that the outlet tube is adapted to direct the flow of breathable gas towards the patient interface and the patient's nose and/or mouth.
