Although ResMed masks are designed to be compatible with most ResMed devices, you should check the compatibility of your specific mask to determine the correct mask setting for your device.Here is a list of recommended compatible masks:Full face masks:+ AirFit F30i+ AirFit F30+ AirFit F20+ AirTouch F20Nose masks:+ AirFit N30i+ AirFit N30+ AirFit N20+ AirTouch N20Nasal cushion masks:+ AirFit P30i+ AirFit P10Visit the latest list of compatible masks here.