CPAP Water Chambers - ResMed AirSense 10 & 11 Humidifier

CPAP water chambers on this page are replacement humidifier tubs for the ResMed AirSense 11 and AirSense 10, along with side covers and the HumidX waterless cartridges for the AirMini. They ship without a prescription.

Replacing a CPAP humidifier water chamber

ResMed water chamber for the AirSense 11 humidifier

The water chamber is the tub that holds the water for the humidifier. Each machine generation has its own, and a chamber from one will not fit the other.

Water chamber prices

Part	Fits	Price
Water chamber	AirSense 11, AirCurve 11	$27.99
Water chamber	AirSense 10, AirCurve 10	$27.99
Side cover	AirSense 11, used in place of the chamber	$18.40
HumidX Standard	AirMini waterless humidification	$34
HumidX Plus	AirMini, for dry climates and flights	$37

Prices checked October 2026. The listings above show the current price and stock.

Looking after the chamber

Empty the chamber each morning and let it dry. Use distilled water, because tap water leaves mineral deposits. Replace the chamber every 6 months, or sooner if it is cloudy, cracked or pitted.

Using the machine without a humidifier

If you do not want humidification, fit the side cover in place of the water chamber. The AirMini has no chamber at all; it uses HumidX cartridges.

What you get with Order Your Supplies

Free shipping on US orders over $99.
No prescription needed for the parts and supplies on this page.
30-day returns on unused products in sealed original packaging.
Not sure a part fits your machine or mask? Call 307-423-0000.

Questions & answers

How often should I replace my CPAP water chamber?

Every 6 months. Replace it sooner if it has turned cloudy or has cracks or white mineral scale that will not wash off.

Does an AirSense 10 water chamber fit the AirSense 11?

No. The two machines use different chambers. Order the one that names your machine.

Can I use tap water in my CPAP humidifier?

Use distilled water. Tap water leaves mineral deposits that shorten the life of the chamber.

Can I run my CPAP without the water chamber?

Yes. On an AirSense 10 or AirSense 11, fit a side cover in place of the chamber and the machine runs without humidification.

Is HumidX a humidifier?

It is the waterless humidification for the AirMini: a small cartridge that returns the moisture from your breath. It works only with the AirMini.

Can I return a part if it is the wrong one?

Yes, within 30 days of delivery if it is unused and still in its sealed original packaging. Approved returns are refunded minus a 20% restocking fee, or you can take store credit. Email returns@orderyoursupplies.com to start a return.

Need help with a different question? Contact our team or call 307-423-0000.