React Health Luna G3 Auto CPAP

The React Health Luna G3 Auto CPAP adjusts your pressure breath by breath through the night, and it can also run at one fixed pressure if that is what your prescription calls for. The heated humidifier is built into the machine rather than clipping on as a separate unit.

One knob does all the driving. Turning and pressing it beside the 3.5 inch color screen reaches every setting you are allowed to change, from ramp time to humidity level, and a home button underneath it steps you straight back out of anywhere you land.

Key Features:

• Auto or fixed: AutoCPAP moves your pressure with your breathing, and fixed CPAP holds one setting, both across 4 to 20 cm H2O.
• Easier exhale: Reslex lowers the pressure as you breathe out, at three strengths, or switches off entirely.
• Gentle start: Auto Ramp begins low and climbs to your prescribed pressure over anything up to sixty minutes.
• Humidity you set: The 360 mL chamber runs on Auto or on any of five levels, with a preheat before bed.
• One filter slot: The Luna G3 takes a black reusable filter or a white disposable one, never both at the same time.
• Data by camera: Ninety days of therapy data leave the machine as a QR code the free 3B Luna QR app reads.

The Luna G3 is ideal for patients who want auto-adjusting pressure, who sleep in a dry or cold bedroom, or who prefer a physical knob to a touchscreen. It suits anyone who would rather read their data off a phone camera than a paired account.

Note: Tubing is included as the plain six foot hose. The integrated heated tube, the SD card and the carry bag are separate purchases, and React Health does not build a battery pack or a DC cord for this machine.

📄 Download the Luna G3 User Guide

How the auto algorithm decides

SmartA is the part that does the deciding. It watches for respiratory events over a period and shifts three numbers in response, the minimum pressure, the smart pressure and the maximum, all inside the window your provider set. SmartC is its counterpart for a fixed prescription, moving the single treatment pressure over time rather than within the night.

The mask type setting feeds into that. You tell the machine on screen whether you are wearing a full face, a nasal or a pillow mask, and the algorithm accounts for the difference in how each style vents. Whatever it settles on, React Health holds the delivered figure to within half a centimeter of the target at a working pressure of 10.

The chamber, the transfer box, and where the moisture comes from

Air drawn in by the blower passes over the surface of the water on its way to the outlet, picking up vapor as it goes. React Health rates the output at no less than 15 mg of water per liter of air, and the level you pick on the knob decides how hard the heater plate beneath the tub works.

Between the blower and the chamber sits a small removable part React Health calls the transfer box. It is what routes air from the machine into the water, and it comes out separately from the chamber, which is why it has its own cleaning interval.

How the data gets out of the machine

The Luna G3 stores up to ninety calendar days internally, whether or not any wireless module is fitted. Ninety days does not fit in one QR code, so the machine presents up to three QR+ codes in sequence, each carrying roughly forty days, and the app flashes between them until it has read them all.

There are two other routes to the same figures. The device shows a set of iCode numbers a provider can enter directly, and it writes to an SD card if one is fitted. Cellular and Wi-Fi modules are optional and fitted at the point of supply, and React Health does not sell them separately afterwards.

Here's everything that comes in the box.

• Luna G3 Auto CPAP machine with heated humidifier
• Six foot standard tubing, 19 mm bore
• User manual and quick start guide
• Luna G3 water chamber
• Power supply and cord
• 90 degree tubing elbow
• Air filter