The S9 Autoset combines an intelligent algorithm with Easy-Breathe expiratory pressure relief (EPR) to dynamically adjust pressure for maximum comfort. The Intelligent algorithm maintains the ideal pressure for you  - automatically adjusting throughout the night to delivery optimal therapy. 

•     The S9 Autoset also features another innovation that is exclusive to ResMed. When used with the H5i humidifier, Climate Control technology provides the precise temperature and humidification for optimal comfort. It has a clever sensor that monitors air close to the mask. As the condition changes, climate Control automatically adjusts, maintaining absolute comfort.
•    Featuring Central Sleep Apnea detection, it can differentiate between Obstructive Sleep Apneas and Central Sleep Apneas and responds appropriately. The central apnea is noted and included in your sleep report for follow -up with your doctor to monitor your ongoing treatment. You are thus assured that you are always receiving appropriate therapy and pressure.
•     ResMed's new Easy-Breathe motor is uniquely designed to achieve better synchrony between you and the device but keeps very quiet about this. in fact it's so quiet, it can barely be heard.