Independent CPAP Comparison
The CPAP Machines Worth Buying, Compared.
React Health Luna G3 Auto
Home CPAP$1,129
Budget-conscious buyersUsers who want heated humidification includedClinics managing cost
Premium comfort at a budget price — the value king.
The Luna G3 delivers surprisingly premium features — heated humidifier, heated tubing, cellular data, and whisper-quiet operation — at $150-200 less than ResMed's flagships. Formerly 3B Medical, React Health has built a strong following with this no-compromise-on-comfort approach.
Common Questions
Is it quiet?
Extremely quiet at 26 dBA — the quietest machine on this list. Virtually inaudible.
Is it easy to use?
Simple dial + color LCD. Not a touchscreen, but intuitive. Preheat function is a nice touch.
Can I travel with it?
Not FAA-approved and at 3.75 lbs it's the heaviest here. Strictly a bedside machine.
How does it track my sleep?
Three data options: built-in cellular modem, WiFi, and QR code smartphone scan. Most connectivity in its class.
Is the humidifier good?
Excellent. Dual-chamber integrated heated humidifier with heated tubing included. Preheat mode warms it before bed.
What masks work?
Universal — works with all standard CPAP masks. No restrictions.
How much does it cost?
Around $839-$899 retail. Great value given the included heated humidifier and tubing.
Who is this NOT for?
Not for travelers (too heavy, no FAA). Not for tech enthusiasts wanting a slick touchscreen or modern app.
✦ Pros
- ✓Quietest machine at 26 dBA — near-silent
- ✓Heated humidifier AND heated tubing included in box
- ✓Preheat function warms humidifier before bedtime
- ✓Three data connectivity options (cellular, WiFi, QR)
- ✓Significantly cheaper than ResMed flagships
- ✓Audible leak detection alerts
✦ Cons
- ✗Heavier and bulkier than competitors (3.75 lbs)
- ✗Not FAA-approved — not for travel
- ✗No touchscreen — dial interface only
- ✗App/portal experience less polished than ResMed's myAir
- ✗Smaller brand ecosystem and community
Therapy modesAPAP, CPAP
Pressure range low (cmH₂O)4
Pressure range high (cmH₂O)20
Device typeAuto-CPAP
Display typeColor LCD (non-touch)
Control interfaceDial + buttons
Voltage100-240V, 50/60Hz (universal)
Power consumption (W)—
RegulatoryFDA Class II, CE marked
Auto adjusting✓ Yes
Epr levels3
Epr labelRESlex (Exhalation Pressure Relief)
Ramp modeAuto-Ramp
Ramp time range (min)0-45
Leak compensation✓ Yes
Central apnea detection✗ No
Cheyne stokes detection✗ No
Rera reporting✗ No
Auto altitude adjustment✗ No
Humidifier typeIntegrated heated (dual-chamber)
Heated tube compatible✓ Yes
Heated tube modelIncluded in box
Climate control auto✓ Yes
Humidity levels6 levels
Tube temperature range (°F)—
Waterless humidification✗ No
Filter typeStandard + PM2.5 fine particle filter
Mask compatibilityUniversal — all standard CPAP masks
Smart start stop✓ Yes
Weight (lbs)3.75
Weight (kg)1.7
Dimensions in10.4 x 5.7 x 4.5 (L x W x H)
Dimensions cm26.4 x 14.5 x 11.4
Faa approved✗ No
Travel friendly ratingLow — home-only design
Battery option✗ No
Battery model—
Battery life (hours)—
Dc power option✗ No
Dc converter model—
Bluetooth✗ No
Cellular✓ Yes
Wifi✓ Yes
Sd card✓ Yes
Usb✗ No
App nameLuna QR Mobile App
App platformsiOS, Android
Clinician portaliCodeConnect
Over the air updates✗ No
Data storage (days)365
Compliance data✓ Yes
Detailed event data✓ Yes
Mask fit check✗ No
Sleep onset detection✗ No
Positional therapy✗ No
For her mode✗ No
Preheat✓ Yes
Noise level (dBA)26
Noise measurement standardISO 17510-1:2007
Noise notesQuietest machine in its class
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