ResMed HumidAir 11 Standard Water Tub

Quick answer: This is the genuine ResMed HumidAir 11 standard water tub for the AirSense 11 and AirCurve 11 (Air11 series) humidifier (part 39100). The tub holds the water that the device warms to humidify your therapy air, easing dryness in the nose, mouth, and throat. This is the standard tub. Important: the HumidAir 11 tub is specific to the Air11 series and is not interchangeable with the Air10 HumidAir tub. Device not included.

What’s included

• 1 × ResMed HumidAir 11 standard water tub (part 39100)

Device and humidifier housing not included.

About this part

Humidification makes CPAP far more comfortable for many people — it eases the dry nose, mouth, and throat that dry pressurized air can cause. The water tub is where that happens: it holds the water the device warms to add moisture to your therapy air.

This is the standard HumidAir 11 tub. ResMed offers the HumidAir 11 in two versions:

• the standard tub (this, 39100), and
• the cleanable tub (39101), designed to be disassembled for easier cleaning and to withstand more thorough washing/dishwasher cleaning per the instructions.

Both do the same humidifying job; the difference is cleaning and longevity. The tub is a wear item — mineral scale builds up over time, and seals and clarity degrade — so it’s replaced periodically.

Generation matters: the HumidAir 11 tub is designed for the Air11 series and is not interchangeable with the Air10 HumidAir tub (37479). Match the tub to your exact device.

Key features

• Genuine ResMed HumidAir 11 standard tub (39100) — for the Air11 series.
• Holds humidifier water — eases dryness in nose, mouth, and throat.
• Standard version — the everyday tub (a cleanable tub, 39101, is also available).
• Air11-specific — not interchangeable with the Air10 HumidAir tub (37479).
• Replaceable wear part — swap out as scale or wear develops.

Specifications

Standard or cleanable — which do I need?

Both are HumidAir 11 tubs for the Air11 series; the difference is cleaning:

• Standard tub (this, 39100) — the everyday tub.
• Cleanable tub (39101) — disassembles for more thorough cleaning and withstands more robust washing (per the instructions).

Either works with the device — choose based on your cleaning preference.

Care & replacement

Empty and rinse the tub daily, and clean it regularly per the ResMed instructions (use distilled water where possible to reduce mineral scale). Replace the tub if you see cracks, cloudiness, persistent scale that won’t clean off, or a seal that no longer seats properly. Using distilled water and regular cleaning extends its life.

Frequently asked questions

What does the water tub do?
It holds the water the device warms to humidify your therapy air, easing dryness in the nose, mouth, and throat.

Which devices does it fit?
The ResMed AirSense 11 and AirCurve 11 (Air11 series).

Will my Air10 HumidAir tub fit my Air11?
No — the HumidAir 11 tub is a different part and is not interchangeable with the Air10 HumidAir tub (37479). Match it to your device.

What’s the difference between the standard and cleanable tub?
The standard tub (39100) is the everyday version; the cleanable tub (39101) disassembles for more thorough cleaning and withstands more robust washing. Both humidify the same way.

When should I replace it?
If it’s cracked, cloudy, persistently scaled, or the seal no longer seats properly.

Do I need a prescription?
No — a replacement water tub does not require a prescription.

Can I get it delivered in Brooklyn or shipped nationwide?
Yes — Stark Medical Supplies offers local pickup and delivery in Brooklyn and across NYC, plus USPS shipping throughout the continental U.S.

Use with compatible ResMed Air11 equipment according to the device’s user guide. Use distilled water where possible, clean regularly, and replace if cracked, clouded, or no longer sealing.