A system and method for delaying the start of the continuous positive air pressure therein making it easier for a user to fall asleep. The system delivers pressurized gas to the airway of a patient. The system has a gas flow generator for providing a flow of gas and a mask for delivery of gas flow to an airway of a patient. The mask has an exhaust port being continuously open and having suitable flow resistance for maintaining a pressure in the cavity. The mask has a breathing port adaptable to open when there is no flow of pressurized air for allowing free breathing by the user. A hose extends between the gas flow generator and the mask for providing a flow of gas. The system has a mechanism for turning the flow of gas on at a time distinct from turning on the apparatus.
