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The Luna II Auto CPAP Machine with Humidifier, also known as the Luna G2, is one of 3B Medical's most popular auto-adjusting CPAP machines. One of its standout features lets you share sleep data with your doctor so you both know your sleep apnea therapy is on track. Rest easy knowing your treatment is being monitored and working the way it should.
The Luna II is a great fit if you are new to CPAP therapy, interested in app integration and data sharing, or looking for reliable auto-adjusting pressure at a more accessible price point. It is also a strong choice for anyone who deals with allergies, since the integrated humidification helps keep airways from drying out.
This optional feature sends your sleep therapy data to your healthcare provider over WiFi or cellular data, so your doctor always knows how your therapy is going. Once it is set up, you can turn this feature on or off anytime from the machine's display.
Your Luna II comes with its own personalized QR code that you can scan anytime to pull up your sleep data on your smartphone. Just download the free 3B/Luna QR app to get started.
The Luna II's integrated, dual-chamber heated humidifier makes it easy to get comfortable, consistent therapy every night. It helps relieve two of the most common CPAP complaints: dried-out airways and sinus congestion.
Luna's full-color LCD screen uses a simple single-dial menu, so checking your settings or your minute-to-minute sleep data at the top of the machine never feels complicated.
Most CPAP and APAP machines cap their ramp time at 45 minutes. The Luna II extends that to a full 60 minutes, giving you 15 extra minutes to comfortably drift off before your prescribed pressure kicks in.
Fewer trips to the doctor, fewer sleep studies, and fewer manual pressure changes. The Luna II measures your breathing every night and automatically adjusts to your ideal therapy pressure while you sleep.
Reslex technology eases pressure as you exhale, so breathing out against the airflow feels far more natural. It is one of the features users mention most often when describing how comfortable the Luna II feels compared to older machines.
Auto start means you never have to reach across the bed to turn your machine on. It begins therapy as soon as it detects breathing in the mask. The Luna II also listens for mask leaks and will sound an audible alert if one is detected. Both features can be switched on or off from the machine's display.
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Sound level |
28 dB |
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Weight |
4 lbs |
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Dimensions |
10.79" L x 7.24" W x 4.53" H |
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Warranty |
2 years |
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Humidification |
Integrated, dual-chamber, heated |
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Ramp time |
Up to 60 minutes |
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Pressure relief |
Reslex expiratory pressure relief |
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Data sharing |
WiFi/cellular to your doctor, plus personalized QR code |
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Auto start |
Yes |
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Mask leak alert |
Yes |
The Luna II Auto CPAP Machine with Humidifier comes with a 2 year warranty. Learn more by reading the user manual and quick guide.
The Luna II is 3B Medical's entry-level auto CPAP machine. If you would like more comfort features and a quieter motor, see the 3B Medical Luna G3 Auto Machine with Heated Humidifier, which adds a Pre-Heat humidifier function and standard heated tubing. For the newest model in the lineup, with a touchscreen display and a 5 year warranty, see the Luna G3X Auto CPAP with Humidifier.
Yes. CPAP and APAP machines are regulated medical devices in the United States, so a valid prescription from a licensed healthcare provider is required to complete your purchase.
Yes. 3B Medical rebranded as React Health, so you may see this same machine listed under either name. It is the same product either way.
The Luna II (also called the Luna G2) is 3B Medical's earlier-generation auto CPAP machine, while the Luna G3 is the newer model with a smaller footprint and additional features. Both include integrated heated humidification and Reslex expiratory pressure relief.
The Luna II can send your sleep therapy data to your doctor automatically over WiFi or cellular once this optional feature is set up. You can also scan your machine's personalized QR code with the free 3B/Luna QR app to view your own data anytime.
The Luna II Auto CPAP Machine with Humidifier includes a 2 year manufacturer's warranty.
I was nervous about using a CPAP, but the Luna II made it simple. It’s easy to use, comfortable, and the built-in humidifier keeps me from waking up dry. I also like that my doctor can check my sleep data. Great machine! I’m finally sleeping better!
