Enhanced AutoSet - All Auto-CPAP (APAP) systems adjust your overall therapy levels to ensure you're receiving the optimal pressure for successful sleep therapy. The S9 AutoSet combines an intelligent algorithm with Easy-Breathe expiratory pressure relief (EPR™) to dynamically adjust pressure for maximum comfort. It continually monitors breathing, adapting breath by breath, to deliver the lowest therapeutic pressure, improving comfort and sleep. In addition the S9’s enhanced AutoSet algorithm takes this a step further, differentiating between obstructive (OSA) and central sleep apneas (CSA) and responding appropriately to each. So whether you're experiencing OSA or CSA you can be confident that you're always receiving optimal therapy at the lowest, most comfortable pressures.

Quietly Capable Easy-Breathe Motor - APAP systems create two types of noise: radiated noise in the room, and conducted noise through the tube. The S9's Easy-Breathe motor with axial air-flow produces less "turbulence" lowering average radiated sound levels to just 24dBA. In addition ResMed has reduced conducted noise levels through the breathing tube by 78%. When fully operational the S9 series is no louder than normal breathing!

Easy-Breathe EPR - ResMed has updated the clinically proven Easy-Breathe EPR waveform. Breath by breath, Easy-Breathe EPR reduces the work of breathing during exhalation providing a gentler pressure that naturally adapts to your breathing cycle throughout the night.

Choose Your Tubing: ClimateLine Heated vs SlimLine Ultra Light - An often overlooked but vitally important element in sleep therapy is the tubing! Tubing designs have remained relatively unchanged for 20-years until now. With the S9 ResMed introduces two great tubing options. SLIMLINE tubing is the lightest, slimmest and most flexible CPAP/BiLevel tube on the market. 40% lighter than traditional tubing, SlimLine tubing eliminates drag on your mask and weight on your bed helping to improve overall mask fit and sleep comfort. SlimLine tubing also features a new smart-fit cuff design that makes it easier to attach and remove the tubing from your machine and mask.

If you choose the H5i Heated Humidifier with your S9 system then you can select CLIMATELINE heated tubing for truly exceptional comfort. The ClimateLine tube features a temperature sensor at the mask end of the tube. You set your preferred humidity and optimum temperature levels and the S9 Climate Control system adjusts your therapy to suit. Because the system measures temperature at the mask, the temperature you feel will remain at your preferred setting, regardless of changes in ambient temperature or humidity. ClimateLine heated tubing offers increased flexibility, more sleeping comfort, less mask drag and prevents rainout without reducing humidity.

Enhanced H5i Humidifier (Optional) - A great sleep therapy system deserves a great humidifier. The H5i Humidifier with Climate Control is just that. The H5i heated humidifier offers relief from dryness and congestion and integrates seamlessly with the S9. Intuitive and easy to use, the S9 automatically detects when the H5i is connected. Using the S9's settings screen you can adjust humidity levels at any time during therapy. The H5i features an adaptive Climate Control system intelligently adjusts to your environmental conditions and delivers optimal temperature and humidity right to the mask. It protects you from rainout without compromising humidity and provides the most comfortable therapy possible.

Mask-Fit Made Easy - The S9's Mask-Fit feature is simple and effective. It offers three settings: Nasal, Pillow and Full Face. With the touch of a button you select your mask style and then the Mask-Fit system will run a quick diagnostic to ensure your mask is sealing properly. If your mask needs adjustment the system will alert you so that you can correct any fitting problems you may have prior to starting therapy.

Data Rich - The S9 allows you to view a snapshot of your sleep therapy directly on the device. Designed to provide daily feedback and encouragement, the Sleep Quality Indicator identifies usage, leak and AHI information. In addition the Sleep Report offers compliance and therapy data for up to 365 days. Data available includes average usage, used hours, days used, run hours and pressure. The S9 also ships with an SD Card inserted in the device that can be used by your doctor to review more advanced information. The SD Card provides detailed graphical data and high resolution flow data. It stores 365 days of therapy and compliance data, 30 days of detailed data, and 7 days of high resolution flow data.