Is this the right machine for you?
The Luna G3 Auto is an auto-adjusting CPAP (APAP) for obstructive sleep apnea. It finds the pressure you need breath by breath, inside the range your doctor sets.
Not sure which of the two you were prescribed? Read us the line on your prescription at (786) 755-8063 and we’ll tell you in a minute.
An auto-adjusting CPAP from React Health — a brand we are an authorized dealer for. Built-in heated humidifier with preheat, 26 dBA (quieter than a whisper), a cellular module so your doctor can follow your therapy remotely, and a screen you can actually read in the dark. $754, prescription required.
Luna G3 Auto or one of the other home machines?
| Luna G3 Auto | AirSense 10 AutoSet | DreamStation 2 Auto | |
|---|---|---|---|
| Price | $754 | $598 | $775 |
| Therapy | Auto-adjusting (APAP) | Auto-adjusting (APAP) | Auto-adjusting (APAP) |
| Noise | 26 dBA | 26.6 dBA | About the same |
| Humidifier | Built in, with preheat | Built in | Built in |
| Remote follow-up | Cellular, built in | Cellular, built in | Cell modem included |
| We are the authorized dealer | Yes | No — genuine unit | No — genuine unit |
All three treat the same thing. The Luna G3 is the one we are an authorized dealer for — warranty and parts come straight through us.
Luna G3 Auto — specs at a glance
What’s in the box
Everything you need to start therapy the night it arrives — except the mask, which is personal.
Luna G3 Auto unit
New in box, ready to run
Heated humidifier chamber
With preheat for warm, moist air
Air tubing
Standard hose, connects in seconds
Air filter
Installed and ready
Power supply
Plug in and go
Carrying case
For travel and storage
User manual + quick start guide
Setup takes a few minutes
Mask sold separately
Add one here and take 10% off it
Tested before it ships
Every unit is powered on, verified and cleaned at our Doral workshop before it’s packed.
A real person answers
(786) 755-8063. We speak English and Spanish, and we know the machine you bought.
Same-day dispatch
Orders confirmed before noon ship the same business day.
Frequently asked questions
What does “authorized dealer” actually get me?
It means American Oxygen buys the Luna G3 directly through React Health’s official channel. Your warranty is handled through us, parts are genuine, and if something fails we don’t have to send you elsewhere.
Is it automatic or a fixed pressure?
Automatic. It adjusts breath by breath inside the range your doctor prescribes. It can also be set to a single fixed pressure if your clinician prefers.
Do I need a prescription?
Yes — a CPAP is a prescription medical device. Have your prescription ready and follow the settings your doctor ordered. We help with setup, but the therapy is directed by your clinician.
Does it come with a mask?
No — masks are personal and sold separately. Add a compatible mask here and take 10% off that mask, or buy the machine on its own and pick a mask later.
Is it noisy? Will it bother my partner?
At 26 dBA it’s quieter than a whisper. The heated humidifier also makes the air gentler on your nose and throat, which is usually what wakes people up in the first weeks.
Can I travel with it?
It’s compact and comes with a case, so it travels fine by car. For flying every night we’d point you to a travel CPAP such as the Transcend Micro or the Luna TravelPAP — we carry both.
Ready to start with the Luna G3 Auto?
Add a mask at 10% off, or take the machine on its own. We set it to your prescription before it ships, and a real person picks up if you call.

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