Cleanable and Dishwasher-Safe Replacement Humidifier Chamber (Water Tub) for ResMed AirSense 10-series PAP Devices compatible with all ResMed AirSense 10 and AirCurve 10 machines. An essential accessory for adding humidity to your PAP therapy. Place distilled water in the chamber and follow the water level marking labelled clearly on the front of the chamber.  This tub comes apart and can be cleaned by hand or by being placed in a dishwater with a mild cleaning agent.