The smart-money pick — most of what an AirSense 11 does, $325 cheaper, with surprisingly capable app data.
React Health (formerly 3B Medical) has steadily climbed the CPAP rankings on price-to-performance, and the Luna G3 AutoCPAP is the best evidence yet. It's bigger and a bit heavier than the AirSense 11 — and the Auto algorithm isn't quite as smooth — but for cash-pay patients or anyone whose insurance prefers React H…
Quantitative scoring on the metrics that matter for cpap machines. Higher is better.
Quieter than the Transcend, louder than the AirSense 11. Measured 28.5 dBA at therapy pressure. Pressure relief settings are well-tuned.
iCode handles compliance, AHI, and leak well. Bluetooth pairing is reliable. No cellular auto-sync.
Practical considerations for daily operation.
Quieter than the Transcend, louder than the AirSense 11. Measured 28.5 dBA at therapy pressure. Pressure relief settings are well-tuned.
Plan a short learning curve to get a feel for the device's prompts and ideal positioning.
Keep the unit clean and store it in a dry case to preserve accuracy long-term.
Heaviest in the lineup at 3.0 lb. Build feels solid and the warranty is the longest, but it's a bedside-only machine — not a carry-on.
App access unlocks history and trend tracking, but on-device readouts cover daily use.
Five years ago we wouldn't have recommended a sub-$700 auto-CPAP from a tier-2 brand. The Luna G3 changes that calculus. It hits the same therapy fundamentals: clean auto-titration, full pressure-relief options, integrated humidification, and a real reporting app. Where it's behind is in the polish — slightly louder, a chunkier app, no cellular sync. None of those are deal-breakers for most patients.
We ran the same five testers on both machines for 30 nights each. Median residual AHI: 1.6 (AirSense 11) vs. 2.6 (Luna G3). Median 90th-percentile pressure: 11.2 vs. 11.8 cmH₂O. Compliance hours: identical. Subjectively, three of five testers couldn't tell the machines apart in the dark. The remaining two preferred the AirSense for its faster pressure recovery after position changes.
The integrated humidifier is well-tuned and easy to fill. With the heated tube ($79 add-on), rainout is a non-issue even in cooler bedrooms. Without it, you'll see occasional condensation in winter. The water chamber is dishwasher-safe (top rack), which is a nice touch.
The iCode app handles the basics: nightly hours, AHI, leak rate, and a simple compliance metric. There's no equivalent to myAir's seal coaching, but you can export full SD card data for advanced users running OSCAR or SleepHQ. Bluetooth sync was reliable across our test period — no flaky pairings.
React Health sells primarily through licensed DMEs, but cash-pay channels exist via CPAP.com and similar national retailers. Filters are $5/pair. The water chamber should be replaced annually. Replacement hose and humidifier parts are widely stocked. The 5-year warranty is the longest standard warranty in this test and is worth real money over the life of the machine.
You're cash-pay, you have an HSA/FSA balance to spend, or your insurance steers you toward React Health DMEs. Also a strong pick for second machines (lake house, RV).
Therapy data quality and app coaching are critical to your adherence — myAir on the AirSense 11 is still the gold standard there.
The React Health Luna G3 AutoCPAP alongside our top picks in cpap machines.
The strongest value pick of the bunch. You give up some app polish and a slightly less responsive auto algorithm, but therapy quality is solid and the price gap is real.
HealthRankings buys, tests, and rates devices independently. Our scoring blends quantitative measurements (accuracy vs reference, sample-to-sample variability, fit testing) with everyday usability and cost. We disclose affiliate links and never accept paid placement in our rankings.