ResMed AirSense 11 humidifier chamber, a transparent water reservoir with a max fill line, labeled for use with distilled water only.

ResMed AirSense 11 Water Chamber Replacement

Name: ResMed AirSense 11 Water Chamber Replacement
Brand: ResMed
SKU: HU-CH-RMD-S11
Price: 29.00 USD
Availability: InStock

(100 reviews)

$29.00 ~~$44.00~~

Free Shipping Over $50

Price Match Guarantee

Humidification should feel effortless. The ResMed AirSense 11 Water Chamber Replacement is the removable tub made for the AirSense 11 HumidAir system, helping you maintain consistent, comfortable moisture night after night without complicating your routine.

Designed to be easy to fill and hand‑clean, this durable chamber supports active heated humidification so your therapy stays steady and predictable. For a seamless fit with your setup, it’s purpose‑built for the AirSense 11 platform.

Consistent comfort: Supports steady humidification throughout the night.
Simple upkeep: Clear max fill line and removable design for quick care.
Durable build: Injection‑molded plastic, stainless steel, and silicone seal with a 90‑day warranty.
Made for AirSense 11: Fits the HumidAir system for a precise, secure fit.
Room to breathe: 380 mL maximum capacity for fewer refills.

Manufacturer Product Number: 39100

Standard Water Chamber for AirSense 11 Humidair Heated Humidifier

User Guide

Keep your AirSense 11 humidification consistent and hygienic

This chamber is specifically designed for the AirSense 11. Your machine can even help you stay on schedule with the Humidifier Set function that provides replacement reminders. Browse other compatible components on the curated AirSense 11 Replacement Parts page or learn more about the device itself on the AirSense 11 AutoSet CPAP Machine page.

For best results, use room‑temperature distilled water only and avoid additives like oils or perfumes, which can affect materials and humidification output. Wipe the tub daily and dry it out of direct sunlight; wash weekly with warm water and mild detergent. The standard chamber is not dishwasher safe—hand‑wash only.

Keep water below the marked max fill line.
Empty the tank before moving your device.
Rinse well and air‑dry fully between uses.

Place your machine on a level surface below head height to help prevent water from reaching the mask or tubing. Do not power on without the tank installed; if you’re not using water, keep the tank in place and set humidification to 0 to protect the motor and maintain proper airflow.

Avoid overfilling or tilting the device on its side.
Check for leaks or cracks and replace promptly if found.

AirSense 11 Disposable Filters for clean, optimized airflow.
ClimateLineAir Heated Tubing to help maintain comfortable humidity from machine to mask.
SlimLine Tubing as a lightweight, flexible hose option.

Product Model	Standard 11
Vendor Product Number	39100
Materials	Injection Molded Plastic (Acrylonitrile Butadiene Styrene), Stainless Steel, Silicone Seal
Tax Category	CPAP Replacement Supplies
Billing Code	A7046 (Humidifier Chamber)
Product Life	6 - 12 Months

4.8

Rated 4.8 out of 5 stars

Based on 100 reviews

Total 5 star reviews: 86 Total 4 star reviews: 9 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 3

95%would recommend this product

Customers Talked About

Write a Review (Opens in a new window)

100 reviews

Sort

JS
Justin S.
1 month ago
Rated 5 out of 5 stars
What can I say, it’s
What can I say, it’s the exact product shipped with the Airsense 11, at a good price!
Was this helpful?
GW
Greg W.
1 month ago
Rated 5 out of 5 stars
absolutely needed
absolutely needed
Was this helpful?
JC
Jonathan C.
1 month ago
Rated 5 out of 5 stars
Works well and fits perfectly
Works well and fits perfectly
Was this helpful?
KB
Kenneth B.
1 month ago
Rated 5 out of 5 stars
Works very well no leaks
Works very well no leaks
Was this helpful?
AO
Amanda O.
1 month ago
Rated 4 out of 5 stars
Even though this is the
Even though this is the water chamber recommended to go with ResMed AirSense 11, it is a little finicky to get it to seat in the housing correctly. Sometimes I get it on the first try; other times, it doesn't seal correctly and the fit leaves gaps where the air hisses out when trying to test it. I wish they could fix the tolerances on this so it wasn't an issue. Otherwise, it washes fairly well and it definitely lasts 6+ months.
Was this helpful?