Quick answer: This is the genuine ResMed standard water chamber for the HumidAire H4i heated humidifier (part 26952) — the water tub that sits in the front of the humidifier on ResMed S8-series CPAP/VPAP machines. This is the standard (hand-wash) version — the everyday replacement tub, at a lower cost than the cleanable model. It's washed by hand and typically replaced about every 6 months. Holds ~380 mL. This is the water chamber only — the flip-top lid/seal is not included. Humidifier and machine not included.
What's included
- 1 × H4i standard water chamber (tub, part 26952)
Not included: flip-top lid and seal (26953), humidifier, machine.
About this part
The HumidAire H4i heats water in this chamber to add moisture to your therapy air, easing dry nose, mouth, and throat. This is the standard water chamber — the routine replacement tub:
- Hand-wash tub — cleaned by hand (not designed to be taken apart or put in a dishwasher).
- Replaced about every 6 months — with use, tap-water minerals can leave the tub discolored, cloudy, cracked, or pitted, and worn plastic can trap bacteria — so it's replaced periodically like any humidifier tub.
- ~380 mL capacity — use distilled water at room temperature to reduce calcium/lime build-up, and change the water daily.
- Lower cost — the economical everyday option (the cleanable chamber costs more but disassembles and is dishwasher-safe).
Standard vs cleanable — choose the right tub:
- 26952 (this) — standard, hand-wash only, lower cost, replace ~every 6 months.
- 26958 — cleanable / dishwasher-safe, stainless steel + silicone, disassembles, multi-patient, longer-lasting.
Compatibility
For the HumidAire H4i humidifier on ResMed S8-series machines (CPAP/VPAP). It can also be used in an H3i humidifier only if that unit has the H4i flip-top lid (26953) fitted (the H3i and H4i chambers/lids differ — check the model sticker on the humidifier).
Note: H4i is an older-generation humidifier. The current AirSense 10 / AirSense 11 machines use different water chambers — this tub is not for those.
Key features
- Genuine ResMed H4i standard water chamber (26952).
- The economical, everyday replacement tub — hand-wash.
- Replace ~every 6 months — keeps humidification clean and effective.
- ~380 mL — use distilled water; change daily.
- For H4i on ResMed S8-series — tub only (lid 26953 separate).
- Lower-cost alternative to the cleanable chamber (26958).
Specifications
| Specification | Detail |
| Product type | Heated-humidifier water chamber (standard, hand-wash) |
| For humidifier | ResMed HumidAire H4i |
| Compatible machines | ResMed S8 series (CPAP/VPAP); H3i only with H4i lid (26953) |
| Capacity | ~380 mL |
| Materials | Injection-moulded plastic, aluminium, thermoplastic elastomer |
| Cleaning | Hand-wash only (not dishwasher-safe; does not disassemble) |
| Replacement | Approximately every 6 months |
| Water | Distilled water; change daily |
| Included | Water chamber (tub) only |
| Not included | Flip-top lid + seal (26953), humidifier, machine |
| Versions | 26952 standard (this) · 26958 cleanable (dishwasher-safe) |
| HCPCS | A7046 |
| Prescription | Not required |
| ResMed reference / SKU | 26952 |
| Brand | ResMed |
Frequently asked questions
What's included? The standard water chamber (tub) only. The flip-top lid and seal (26953), the humidifier, and the machine are separate.
How is it different from the cleanable chamber (26958)? This standard tub is hand-wash only and lower cost, typically replaced about every 6 months. The cleanable chamber disassembles, is dishwasher-safe, lasts longer, and is multi-patient approved (at a higher price).
Which machines does it work with? The HumidAire H4i humidifier on ResMed S8-series machines. It works in an H3i only if that unit has the H4i lid (26953). It's not for AirSense 10/11.
How often should I replace it? About every 6 months, or sooner if it looks discolored, cloudy, cracked, or pitted.
What water should I use? Distilled water at room temperature, to reduce mineral/lime build-up. Change the water daily.
Do I need a prescription? No — this replacement part does not require a prescription.
Can I get it delivered in Brooklyn or shipped nationwide? Yes — Task Supply Corp offers USPS shipping throughout the continental U.S., plus local pickup and delivery in Brooklyn and all five boroughs of New York City.
Use with a compatible ResMed H4i humidifier and S8-series device according to the H4i user guide. Use distilled water and empty the chamber before transport.