ResMed HumidAir 11 Humidifier Tub (AirSense 11)

Over time, a humidifier tub can crack, cloud, or wear at the seal — and a worn seal is often the real reason a machine feels drier or noisier than it used to. This is ResMed's genuine replacement tub made specifically for the AirSense 11's built-in humidifier.

Note it's a different design from the tub used on the AirSense 10 or AirCurve 10 — the two aren't interchangeable. It holds 380 mL, sits directly into the humidifier bay, and is built from medical-grade plastic with a stainless-steel plate and silicone seal. Fill with distilled water only, and hand-wash weekly to keep it clear.

• Genuine HumidAir 11 water tub, made for the AirSense 11
• Not compatible with AirSense 10 / AirCurve 10 / S9
• 380 mL; medical-grade plastic, stainless-steel plate, silicone seal