Standard Water Chamber for AirSense™ 11 Humidair™ Heated Humidifier

This Standard Water Chamber is a direct replacement for the ResMed AirSense 11 AutoSet CPAP with HumidAir Heated Humidifier. It's an easily removable chamber built for heated humidification, designed to be quick to fill, clean, and maintain as part of consistent, comfortable therapy.

Is This the Right Water Chamber for You?

This is the correct replacement part if your AirSense 11 uses the HumidAir Heated Humidifier and you're comfortable hand-washing your chamber weekly. If you'd rather run your water chamber through the dishwasher instead, see the Cleanable Water Chamber for AirSense 11 instead — it's a separate, dishwasher-safe version built for the same machine. If you're actually on an AirSense 10 rather than an 11, you'll want the AirSense 10 Standard Water Chamber instead, since the two aren't interchangeable.

Key Features at a Glance

• Direct replacement chamber for the AirSense 11 HumidAir Heated Humidifier
• Easily removable for filling and cleaning
• 380 mL maximum water capacity
• Made with silicone, stainless steel, and injection-molded plastic
• 90-day warranty against manufacturer defects
• Hand-wash only — not dishwasher safe

What to Know Before You Buy

• For optimal humidification and device longevity, use distilled water only
• Avoid oils, perfumes, or other additives, which can reduce humidification and cause early deterioration
• If your AirSense 11 supports it, you can set up replacement reminders through the machine's built-in Humidifier Set function
• Made with top-quality materials and components, backed by a 90-day warranty against manufacturer defects

Standard vs. Cleanable: Which Chamber Do You Need?

ResMed sells two versions of this chamber for the AirSense 11, and it's worth confirming which one you want before ordering. This Standard chamber is designed for handwashing only and should not go in the dishwasher. The separate Cleanable chamber is built to be dishwasher-safe and can be disassembled for a more thorough clean. Both fit the same AirSense 11 HumidAir system — the choice comes down to whether you'd rather hand-wash weekly or run it through the dishwasher. See the Cleanable Water Chamber for AirSense 11 if that's your preference.

Materials & Build

This chamber is built from silicone, stainless steel, and injection-molded plastic. It has a maximum water capacity of 380 mL. To prevent water from entering your mask and tubing, use the device on a level surface positioned lower than your head's elevation during therapy.

Cleaning & Care

1. Wipe the chamber daily with a clean, disposable cloth and let it dry away from direct sunlight.
2. Wash weekly by hand with warm water and a mild detergent, or a solution of 1 part white vinegar to 9 parts room-temperature water.
3. Rinse thoroughly and air dry completely before reinstalling, away from direct sunlight or heat.
4. Use distilled water only — tap water's dissolved minerals can cause residue buildup and premature deterioration.
5. Avoid oils and perfumes as additives; they can reduce humidification and accelerate wear on the chamber.

Replacement Guidance

Replace this chamber approximately every 6 months, or immediately at the first signs of cracks, leakage, discoloration, or other degradation. Each chamber includes a 90-day warranty against manufacturer defects. If your AirSense 11 is set up with the Humidifier Set function, you can use it to receive a recurring reminder to replace your chamber on schedule.

Specifications

Complete Your AirSense 11 Setup

If you'd rather not hand-wash weekly, compare the Cleanable Water Chamber for AirSense 11. Pair your chamber with the ClimateLineAir 11 Heated Tube for more consistent humidification, and check your AirSense 11 Disposable Filters while you're replacing parts. Running an AirSense 10 instead? See the AirSense 10 Standard Water Chamber or AirSense 10 Cleanable Water Chamber. See more from the brand on the ResMed brand page.

Frequently Asked Questions

Is this water chamber dishwasher safe?

No. This Standard chamber is designed for handwashing only. If you want a dishwasher-safe option, see the Cleanable Water Chamber for AirSense 11 instead.

What's the water capacity?

This chamber has a maximum capacity of 380 mL. That said, some users coming from the AirSense 10 report the AirSense 11 chamber running low before morning even at the same rated capacity — this is a commonly reported experience tied to the chamber's shape rather than a defect, so it's worth knowing going in if overnight capacity matters to you.

How often should I clean it?

Wipe it daily with a clean, disposable cloth, and wash it by hand weekly with warm water and mild detergent (or a diluted vinegar solution).

How often should I replace it?

Approximately every 6 months, or sooner if you notice cracks, leakage, or discoloration.

What's the difference between this and the Cleanable chamber?

Both fit the same AirSense 11 HumidAir system. This Standard chamber is hand-wash only, while the Cleanable Water Chamber is dishwasher-safe and can be disassembled for a more thorough clean.

Can I use tap water instead of distilled water?

It's not recommended. Tap water's dissolved minerals can build up as residue and lead to premature deterioration of the chamber. Use distilled water at room temperature for best results.

Does this fit my AirSense 10?

No. This chamber is built specifically for the AirSense 11 HumidAir system. If you have an AirSense 10, see the AirSense 10 Standard Water Chamber instead.

Do I need a prescription to buy this?

No. Replacement parts like this water chamber don't require a prescription. A prescription is only needed for CPAP masks and machines.