The AirSense 11 water chamber, also known as the HumidAir water chamber, is a crucial component of the ResMed AirSense 11 CPAP machine, designed to add moisture to the air you breathe during therapy. It's a detachable, easy-to-fill, and clean tub that integrates seamlessly with the machine. The chamber holds up to 380 mL of water and is specifically designed for the AirSense 11 and AirCurve 11 devices