HumidAire Humidifier Tubs & Replacement Water Chambers

Dry mouth, a raw throat, or a stuffy nose after a night on CPAP usually points back to one part: the humidifier tub. Over months of nightly use, water chambers cloud, scale up with mineral deposits, and lose the tight seal that keeps therapy comfortable. Swapping in a fresh HumidAire tub restores clean, consistent humidification and protects the machine underneath it.

This collection carries genuine ResMed HumidAir replacement water chambers built for the AirSense and AirStart 10 platforms. The HumidAir Cleanable Tub (37479) fits the ResMed AirSense CPAP with a built-in HumidAir humidifier, with a clear body that lets you see the water line at a glance and a design made to be disassembled and washed. The ResMed HumidAire Humidifier Tub, 380 mL (37299) is sized for the AirStart 10 APAP, giving you a full night of moisture without frequent refills.

Most manufacturers recommend replacing a water chamber every six months, or sooner if you notice cracking, cloudiness, or hard-water buildup that daily washing no longer clears. Because these are OEM ResMed parts, they seat correctly and seal properly—no leaks, no rattles, no guessing whether an off-brand tub will actually fit your machine. Confirm your device model before ordering, since the AirSense and AirStart chambers are not interchangeable.

For daily upkeep and full-system replacements, browse related CPAP supplies and explore additional CPAP accessories to keep your therapy running the way it should.