Restore smooth and comfortable CPAP therapy with the ResMed HumidAir Humidifier Tub for S10 CPAP BIPAP.Designed for compatible ResMed Airstart 10, AirSense 10, Lumis 100, Lumis 150 and AirCurve 10 machines, this replacement water chamber helps maintain ideal humidification and better sleep comfort.Easy to install, durable, and perfect for replacing worn or leaking humidifier tubs.