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A woman in her fifties sitting on the edge of her bed in morning sun with a mug, her G3 X and mask on the nightstand beside her

Sleep better with CPAP that fits your life

Start with a home sleep test
  • React Health G3 X
  • A mask you choose
  • Support from Somni

Your CPAP, set up around you

Your treatment is more than a machine.

  • React Health G3 X

    Adjusts pressure through the night, within your prescription.2

    The React Health G3 X, a compact black CPAP device with a display, a control knob and a clear water chamber

  • Your mask

    The style and size you choose on your results call.

    React Health Rio II nasal pillow mask
  • Hands sliding the clear water chamber into the side of the G3 X on a nightstand

    Heated humidifier

    Built in, for warm, moist air.

  • Support from Somni

    Help getting started and staying with it, included with your CPAP. No separate support plan.

    How we support you

Find the mask that feels right

Choose the style and size with your Sleep Consultant. If it doesn’t fit, you switch.

  • Not sure which one?

    Your Sleep Consultant helps you choose on your results call.
    Questions now? Call us

  • Less on your face

    React Health Rio II nasal pillow mask

    Nasal pillows · React Health Rio II

    Rest at the nostrils, for the lightest feel.

  • Simple and secure

    React Health Viva nasal mask

    Nasal mask · React Health Viva

    A cushion over your nose that leaves your mouth free.

  • For mouth breathers

    React Health Siesta full face mask

    Full face mask · React Health Siesta

    Covers your nose and mouth.

A G3 X on a wooden nightstand beside a made bed in the first light of morning, its mask resting beside it

Designed to disappear into your night

Compact enough for a nightstand, and made to stay quiet while you sleep.

  • Eases you in

    Ramp can start the air at a lower pressure while you fall asleep.

  • Quiet beside the bed

    Rated 28 dB(A) at a pressure of 10 hPa.2

  • Air that feels better

    The built-in heated humidifier adds warmth and moisture.

From your sleep test to your first night

Four steps, one team, nothing to chase.

  1. A bed slept in but tidy, in early morning sun

    One night at home

    A home sleep test, in your own bed.

  2. A physician’s hands at a desk with a notebook and a laptop

    A physician reviews it

    A sleep physician interprets it and prescribes CPAP if it’s right for you.

  3. A woman setting her G3 X on her nightstand, its box open on the bed

    Your G3 X arrives

    Set to your prescription, with the mask you chose on your results call.

  4. A woman with a coffee outdoors in late-morning sun, smiling to herself

    We stay with you

    Support from Somni, included.

Healthcare works better when someone stays with you.

  • A man in his fifties reads a letter at a sunlit table, a mug beside him

    Answers should lead somewhere

    A diagnosis should come with a clear next step.

  • A woman in her fifties rests on a window seat in soft morning light, a cup in her hands

    Treatment should fit the person

    Mask fit, comfort and how you sleep all matter.

  • A woman laughs on a phone call at her kitchen counter in late-morning sun, a mug in her hand

    Support should continue after delivery

    Starting CPAP takes adjustment. We stay involved.

CPAP questions, answered

Still have a question? Call 786-578-0400, or see all questions.

  • It can take a few nights to get used to. Most of the comfort comes from the mask and the air: the G3 X can start at a lower pressure with Ramp while you fall asleep, and its heated humidifier adds warmth and moisture. If your mask leaks or presses, you switch to a different type or size.

  • CPAP only works while you're wearing it, so it's meant for every time you sleep. Your physician can tell you more about what's right for you.

  • Call us. Many people take a few nights to settle in, and a different mask style often helps. Ramp starts the air gently while you fall asleep, and any change to your settings is a physician's decision.

  • You switch to a different one. Your Sleep Consultant helps you choose the style and size on your results call, and if the fit isn't right once you've tried it, we exchange it for a different type or size.

  • React Health rates it at 28 dB(A) at a pressure of 10 hPa.

  • Your G3 X arrives set to the prescription a sleep physician writes after reading your study. In AutoCPAP mode it can adjust the pressure through the night, within the range your prescription sets. Any change to your settings is a physician's decision.

  • The G3 X weighs 1.7 kg and runs on 100–240 V power through its external adapter. React Health specifies use from sea level up to 2,300 m.

  • CPAP treats sleep apnea while you use it; it doesn't cure it. How long you need it is a question for your physician.

  • A sleep physician reads your study and recommends the treatment that fits you. If CPAP isn't working for you, call us: changes to your treatment are a physician's decision, and they may recommend another option.

  • Yes. If you already have a sleep apnea diagnosis or a CPAP prescription, you may not need a new test. Talk to us before you order one, and a Sleep Consultant will tell you what we need from you.

The same woman and her partner laughing together on their sunny terrace

Treatment starts with knowing what’s happening while you sleep

One night at home tells a sleep physician whether you have sleep apnea, and which treatment fits.

Start with a home sleep test
  1. Patil SP, et al. Treatment of adult obstructive sleep apnea with positive airway pressure: an American Academy of Sleep Medicine systematic review, meta-analysis, and GRADE assessment. J Clin Sleep Med. 2019;15(2):301–334. (opens in a new tab)
  2. React Health. G3 X APAP device: product page, user manual and sell sheet. (opens in a new tab)

Already diagnosed?

If you already have a sleep apnea diagnosis or a CPAP prescription, you may not need a new test. Talk to us before you order one, and a Sleep Consultant will tell you what we need from you.

Call us at 786-578-0400, or send us a message.

G3 X specifications

Therapy

Modes
CPAP and AutoCPAP
Pressure range
4–20 cmH₂OAdjustable in 0.5 cmH₂O steps
Auto range tuning
Smart ATunes the auto range from your recent nights. A clinician setting.
Prescription
Required

Comfort

Sound level
28 dB(A)Sound pressure at 10 hPa, uncertainty 2 dB(A); sound power 36 dB(A)
Humidifier
Integrated, heated: Off, Auto, 1–5
Water chamber
360 mL to the max fill line
Heated tubing
Supported: Off, 1–519 mm tubing, an accessory
Ramp
0–60 minutes, or Auto
Exhalation relief
Reslex Off, 1–3Enabled by your clinician
Auto On and Auto Off
Starts when you breathe into the maskWith Auto Off on, stops when you take the mask off
Mask fit test
Built in

Size and power

Dimensions (L × W × H)
265 × 145 × 114 mm10.4 × 5.7 × 4.5 in
Weight
1.7 kg (3.75 lb)
Display
3.5-inch LCD, control knob and home button
Power
100–240 V AC, 50/60 HzExternal power adapter
Operating altitude
Sea level to 2,300 m

Data

Connectivity
4G cellularUsage data to React Health Connect
Other data options
SD card, iCode and iCode QR+
Reminders
Filter, tube and maskEvery 30, 60, 90, 180 or 365 days, or off

Warranty and care

Warranty
5 years on the deviceLimited warranty; accessories 3 months
Replace tubing and water chamber
About every 6 months

Specifications are React Health’s, from the G3 X product page, user manual and sell sheet. Some settings are enabled by your clinician. Specifications may change.

How we know

What the evidence review found

Compared with no treatment, CPAP reduced sleepiness, blood pressure and motor vehicle accidents, and improved sleep-related quality of life in adults with sleep apnea. Starting CPAP at home worked as well as starting it in a sleep lab, and education, troubleshooting and remote monitoring helped people keep using it.

Patil SP, et al. J Clin Sleep Med. 2019. doi:10.5664/jcsm.7638

What the guideline recommends

  • StrongCPAP for adults with sleep apnea who are excessively sleepy.
  • StrongEducation when CPAP starts.
  • ConditionalCPAP for adults whose sleep affects their quality of life.
  • ConditionalCPAP for adults who also have high blood pressure.
  • ConditionalTroubleshooting help and remote monitoring early on.

Patil SP, et al. J Clin Sleep Med. 2019. doi:10.5664/jcsm.7640

These guidelines are written for clinicians. They describe the evidence, not a promise of results for any one person, and they do not endorse Somni.