A ventilator system includes a mask to be placed over a wearers face. The mask has a shell. The ventilator shell further includes a cushion provided to the shell to sealingly connect the mask to the wearers face and thereby form a chamber between the shell and the wearers face. The ventilator system also includes an inlet port in the shell and an air flow generator. The inlet port is configured to receive a flow of breathable gas. The air flow generator is mounted on the mask and is capable of creating a pressure of about 2-40 cm H2O in the chamber.
