React Health
React Health Luna G3
$849
Best Cpap Machines · head-to-head
React Health Luna G3 vs Somnetics Transcend Micro Auto CPAP
A sourced, side-by-side comparison. Somnetics Transcend Micro Auto CPAP is cheaper at $769. Every spec and price links to its source.
Somnetics
Somnetics Transcend Micro Auto CPAP
$769Cheaper
Which is better: the React Health Luna G3 or Somnetics Transcend Micro Auto CPAP?
The Somnetics Transcend Micro Auto CPAP wins 1 of the 1 specs we compare head to head; the other wins 0. The Somnetics Transcend Micro Auto CPAP is the cheaper at $769. The Somnetics Transcend Micro Auto CPAP both leads on specs and costs less — the straightforward pick.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec |  React Health Luna G3 |  Somnetics Transcend Micro Auto CPAP |
|---|---|---|
| US price | $849 | $769 |
| Brand | React Health | Somnetics |
| Released | — | — |
| Pressure range cmh2o | 4–20 (0.5 cmH2O increments) | 4–20 |
| Machine type | APAP (Auto-CPAP), fixed CPAP mode available | APAP (Auto CPAP), switchable to fixed CPAP mode |
| Humidifier type | Integrated heated humidifier (360 mL max fill) with pre-heat function and heated tubing | Waterless AirMist HME (heat-and-moisture exchanger); no integrated water tank |
| Noise level (dB) | 28 | 27 |
| Weight (lb) | 3.75 | 0.48 |
| Data connectivity | Integrated cellular modem (React Health Luna QR app) | Bluetooth to the MySleepDash app (24hr/7-day/30-day/90-day compliance reports) |
| Ramp feature | Yes | Yes |
| Mask compatibility | — | Universal — works with any mask with a standard 22mm connection |
| Altitude adjustment | — | Yes |
Sources — React Health Luna G3: reacthealth.com (verified 2026-08-01). Somnetics Transcend Micro Auto CPAP: mytranscend.com (verified 2026-11-05).
What's the difference between the React Health Luna G3 and Somnetics Transcend Micro Auto CPAP?
Where the two actually differ on the specs we track (6 of 9). Matching specs are omitted.
- Pressure range cmh2o: React Health Luna G3 4–20 (0.5 cmH2O increments) vs Somnetics Transcend Micro Auto CPAP 4–20
- Machine type: React Health Luna G3 APAP (Auto-CPAP), fixed CPAP mode available vs Somnetics Transcend Micro Auto CPAP APAP (Auto CPAP), switchable to fixed CPAP mode
- Humidifier type: React Health Luna G3 Integrated heated humidifier (360 mL max fill) with pre-heat function and heated tubing vs Somnetics Transcend Micro Auto CPAP Waterless AirMist HME (heat-and-moisture exchanger); no integrated water tank
- Noise level (dB): React Health Luna G3 28 vs Somnetics Transcend Micro Auto CPAP 27
- Weight (lb): React Health Luna G3 3.75 vs Somnetics Transcend Micro Auto CPAP 0.48
- Data connectivity: React Health Luna G3 Integrated cellular modem (React Health Luna QR app) vs Somnetics Transcend Micro Auto CPAP Bluetooth to the MySleepDash app (24hr/7-day/30-day/90-day compliance reports)