ResMed H4i CPAP Humidifier Water Chamber
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ResMed H4i CPAP Humidifier Water Chamber

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  • Order ships next business day  
  • No Prescription Required
  • Download Insurance Claim Form

Best CPAP Machine's Humidifier

The H4i Water Chamber from ResMed is compatible with humidifiers for ResMed's S8 CPAP machines. If you want to get the most out of your H4i humidifier, you'll need the bigger and smoother Water Chamber.


The H4i water chamber is designed for ResMed S8 products and more specifically, the H4i humidifier. The water chamber will also work inside H3i humidifiers; the H3i is no longer manufactured.

Key Features

  • Detaches Easily
  • Bigger Water Chamber
  • Compatible with H4i Humidifier and S8 Machines

Reviewers Tip:

This is the water chamber ONLY. It does not come with a heated humidifier or any other ResMed accessories.

ResMed S8 Series II: Quiet Comfort


Can I wash this in a dishwasher?

No, the manufacturer advises against using it for this chamber. It might break.

How should I clean it?

At Respshop, we recommend cleaning your CPAP equipment with warm water, a non-abrasive soap, and a soft cloth. Distilled water works well but is not necessary.

Can I use this water chamber with my HumidAire 3i station?

Yes. The H4i chamber can be used with the HumidAire 3i. You'll need to replace the top cover and top seal of the 3i with the humidifier top cover and seal, your H4i water chamber, and this plug. Either the cleanable or traditional water tub will work on the HumidAire 3i. The HumidAire 3i water chamber will not work at the docking station.

The H3i lid and seal are not compatible with the H4i humidifier water chamber.

The H4i lid and seal (26953) are compatible with the H3i water chamber.


Available Accessories

Also, see these items:

Related Parts
Technical Data
Water Chamber Capacity
390 ml
30 days
Reviews (2)
teresa 05/08/2019
3 of 5 Stars!

hola me interesa la camara de agua h41 necesito 3 me podran ayudar estoy en puebla ciudad de mex

We are so sorry, this is an older item and we no longer sell it.

Lo sentimos mucho, este es un artà­culo más antiguo y ya no lo vendemos.

William G(Verified Purchase) 11/26/2017
5 of 5 Stars!

Like the new style with mechanical metal bottom versus the old one where eventually the glue would loosen after repeated cleanings in hot water. I bought this one to have on hand as a spare. Again great price and shipping using Resphshop.

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Q&As (2)
Have a question on this item? Ask here and we will answer it in 12-24 hours, usually in a few business hours! Questions and answers will appear here after we answer. You may also have email notifications.
Hi there, yes, this will work with the S8 Escape II.
si no entona en mi maquina kla puedo regresar
Hi there, unfortunately when I translated your message, I could not understand your question. Please give us a call, or message us in chat on our website so that we can help you 866-936-3754. Thank you.
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