Description
Quick answer: This is the genuine ResMed 30W power supply unit (PSU) for the S9 series CPAP/BiLevel machines (part 36920) — a lightweight, compact, travel-friendly power supply. Important: the 30W PSU powers the S9 machine only — NOT the H5i heated humidifier or heated tubing. For a machine with humidifier, use the 90W PSU instead. It includes four international plug adapters (US/EUR/AUS/UK) and works on 100–240V worldwide — ideal for travel without a humidifier. No prescription required.
⚠️ Important — machine only, no humidifier
- The 30W PSU is designed to power the S9 CPAP/VPAP machine on its own. It does not support the H5i heated humidifier or heated tubing.
- Do not use it to power a machine + humidifier together — that can damage the machine or the power supply.
- If you use a humidifier, use the 90W PSU (36970). If you travel without the humidifier, the 30W is the lighter, smaller choice. (With a humidified machine, the heater plate and tubing must be turned off — passover mode only.)
What’s included
- 1 × ResMed S9 30W power supply unit (part 36920)
- 4 × international plug adapters (US, Europe, Australia, UK)
Machine not included.
About this part
ResMed’s S9 machines run on an external PSU. There are two versions — a 90W (supplied as standard, powers machine and humidifier) and this 30W (optional, machine only):
- Lightweight & compact — about 2.5″ shorter and roughly ¾ the weight of the 90W PSU; easy to pack.
- Travel-ready — universal 100–240V input with four plug adapters for worldwide use.
- Machine-only power — powers any S9 CPAP/VPAP unit without humidification.
- Great for travel — the go-to PSU when you leave the H5i humidifier at home.
Compatibility
Powers all ResMed S9-series CPAP/VPAP machines — without the H5i humidifier or heated tubing. Note: this is for the S9 generation; the S8, AirSense/AirCurve 10, and 11 use different power supplies.
Key features
- Genuine ResMed S9 30W PSU (36920) — lightweight, travel-friendly.
- ⚠️ Machine only — does NOT power the H5i humidifier or heated tubing.
- Smaller & lighter than the 90W PSU — great for travel.
- 4 international adapters + 100–240V — worldwide use.
- All S9 CPAP/VPAP machines (without humidification).
Specifications
| Specification | Detail |
|---|---|
| Product type | AC power supply unit (30W) |
| Compatible machines | All ResMed S9 CPAP/VPAP — machine only, no humidifier |
| Does NOT power | H5i heated humidifier, heated tubing (use 90W PSU 36970) |
| Input | 100–240V, 50–60Hz (universal) |
| Adapters | 4 international (US/EUR/AUS/UK) |
| Size/weight | ~2.5″ shorter, ~¾ weight of 90W PSU |
| Cord | AC power cord may be separate (confirm) |
| Not for | S8, AirSense/AirCurve 10 & 11 (different PSUs) |
| HCPCS | E1399 |
| Prescription | Not required |
| ResMed reference / SKU | 36920 |
| Brand | ResMed |
Frequently asked questions
Which machines does it power?
All ResMed S9 CPAP/VPAP machines — but only the machine, not the H5i humidifier or heated tubing.
Can I use it with my humidifier?
No — the 30W PSU does not support the H5i humidifier or heated tubing, and using it that way can damage the machine or PSU. Use the 90W PSU (36970) for a humidified setup.
Why choose the 30W over the 90W?
It’s smaller and lighter — ideal for travel when you’re not bringing the humidifier.
Can I use it internationally?
Yes — it’s rated 100–240V and includes four plug adapters (US/EUR/AUS/UK).
Does it fit my AirSense 10 or S8?
No — this is for the S9 series. Other generations use different power supplies.
Do I need a prescription?
No — a power supply 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 only the correct ResMed power supply for your setup. The 30W PSU powers the S9 machine only — do not use it to power a humidifier. Follow the S9 user guide.
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