NOW AVAILABLE AT CPAP.COM

The CPAP you’ve

been searching for.

The G3 X delivers high-performance therapy, foam-free construction, and a 5-year warranty—all at a price that lets you breathe.

Get Special Launch Offer
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The G3 X delivers better nights,

because you've lost enough sleep already.

Built to last

With the 5-year warranty to prove it.

Custom pressure response

Adapts to you with every breath.

Unique honeycomb design

Keeps it foam-free and worry-free.

React Health G3 X Auto CPAP machine, black finish with digital display and transparent water chamber.
Text graphic stating compatibility with any mask for the React Health G3 X CPAP machine.
React Health G3 X Auto CPAP Machine, black compact unit with digital display and water chamber.
Man sleeping with React Health G3 X auto CPAP machine on a nightstand next to the bed.
React Health G3 X Auto CPAP machine detail showing the built-in humidifier and internal components.
React Health G3 X Auto CPAP Machine close-up showing the digital display screen and control dial.
React Health G3 X Auto CPAP machine with gray carrying case, water chamber, tubing, and power adapter.
React Health G3 X Auto CPAP machine on a wooden nightstand next to a bed and small potted plant.
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React Health

G3 X Auto CPAP Machine

Free shipping

5 Year Warranty

Price Match Guarantee

Meet the new G3 X APAP from React Health. With first-of-its-kind foam-free engineering, a 5-year warranty, and smart pressure response that adapts to your breathing in real time, every detail is designed to give you peace of mind—even the price.

Whether you’re upgrading from an older machine or just starting CPAP, the G3 X will have you sleeping comfortably and in control from the very first breath.

Choose the bundle that matches your sleep style

React Health G3 X with Nova Micro Mask Bundle

React Health G3 X with Nova Micro Mask Bundle

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React Health G3 X with Nova Nasal Mask Bundle

React Health G3 X with Nova Nasal Mask Bundle

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React Health G3 X with DreamWear Mask Bundle

React Health G3 X with DreamWear Mask Bundle

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Foam-free. Finally.

Traditional CPAP machines use foam for sound-dampening, but foam can degrade over time.

G3 X was built completely foam-free, using a unique honeycomb design to keep things whisper-quiet.

Meaning your airway stays completely clear, for cleaner air and safer sleep year after year.

The

cpap.com

Difference

Over 2.3 million people trust us with their therapy. Our CPAP Guides are real experts with real answers—here to help you adjust, troubleshoot, and sleep comfortably with support that lasts.

Free shipping on all machine orders

60-Night Machine & Mask Guarantee

Award-winning CPAP guides

Over 25 Years of Personalized Care

Price-Match Guarantee

Commitment to Quality

Real People, Real Results

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“Couldn’t ask for more. It’s very quiet and doesn’t need adjusting due to its auto pressure feature. Mine is just set from 4-20 and it runs between 7. 5-8. 5 every night. Comes with a travel bag. The cord is nice and long. I’ve had it a year and only good things to say.”

Johnathan P.

cpap.com customer

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“Best apap/cpap unit out there, hands down!! I’ve used the two other brands and this unit is by far the quietest, most feature packed, innovative. Glad I did not buy the overadvertised and over sold competitor model for $400 more!”

Allan K.

cpap.com customer

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"Quiet, starts up quickly, humidifier tank is easy to fill. And, unlike the high-priced competitor it replaced, it does NOT smell strongly of hot electronics or scorched plastic. The lower price point is a plus."

Christopher B.

cpap.com customer

The right accessories make everything more comfortable

React Health heated CPAP hose, white corrugated tubing coiled with electrical connector

Best seller

Heated Hose for React Health G3 X

$44.00

Add to cart

cpaphero CPAP cleaning brush kit with white wire brushes and clear plastic mask components

Best seller

CPAP Mask and Tube Cleaning Brush Kit

$9.99

Add to cart

Medistrom AirMini Universal Hose Adapter, gray plastic connector attached to a white CPAP device.

Best seller

AirMini Universal Hose Adapter

$19.99

Add to cart

Purdoux CPAP Soap

Best seller

Purdoux CPAP Mask & Hose Soap

$5.99

Add to cart

ResMed AirFit F20 full face CPAP mask with grey headgear and clear silicone cushion.

Best seller

AirFit F20 Full Face Mask

$155.00

Add to cart

Transcend Micro 510 travel CPAP machines in pink, navy blue, charcoal grey, and white.

Best seller

Transcend Micro 510 Travel CPAP Machine

$829.00

Add to cart

ResMed AirFit N20 nasal mask with gray headgear and clear nasal cushion, angled view.

Best seller

AirFit N20 Nasal Mask

$105.00

Add to cart

AirMini with AirFit P10 Nasal Pillow Mask Bundle

Best seller

AirMini with AirFit P10 Nasal Pillow Mask Bundle

$1,084.00

Add to cart

ResMed AirFit F40 Full Face CPAP Mask with Headgear - CPAP.com

Best seller

ResMed AirFit F40 Full Face CPAP Mask with Headgear

$155.00

Add to cart

See more products

FAQs about the React Health

G3 X Auto CPAP Machine

Yes. The G3 X has a built-in humidifier to help with nasal dryness and general irritation. It holds up to 360 mL of distilled water and features 5 humidity levels to help you find your sweet spot. A heated breathing tube is also available as an optional accessory to reduce condensation.
Yes, the G3 X works with any CPAP mask using the standard 22mm connection, regardless of brand. For optimal performance, REACT HEALTH recommends using masks from their approved selection or those prescribed by your physician.
Important notes:
  • All standard CPAP masks will connect and function
  • React Health recommended masks are optimized for device performance and therapy effectiveness
  • Your prescribing physician may have specific mask recommendations based on your therapy needs
  • Masks should comply with ISO 17510:2015 for verified safety and performance
While React Health approved masks offer the best-verified performance, we encourage you to explore different options to find your perfect fit. With our 60-night risk-free trial, you can discover which mask gives you the most comfortable, restful sleep.
The sound pressure level does not exceed 28 dB, meaning it’s quieter than a whisper. Most people won’t notice the sound, especially once they’re used to it.
Yes. Like all CPAP machines, the G3 X requires a prescription. It's a medical device, and U.S. federal law requires it to be sold on the order of a physician. If you have a diagnosis and a prescription in hand, you're ready to go. If not, don’t worry—we can help.
An LCD screen, a single knob, and two buttons handle everything you need. Auto On means the device starts simply by breathing into your mask—no buttons to fumble with in the dark. The Ramp feature eases you in by starting at a lower pressure and gradually building to your prescribed level, so falling asleep feels natural.
Not every night of sleep is the same, and the G3 X knows that. In AutoCPAP mode, it tracks apnea and snoring events in real time and adjusts your pressure automatically—never dropping below what your doctor prescribed. The optional SmartA feature goes a step further, allowing your clinician to enable gradual adjustments to your baseline settings based on how you actually breathe.
For years, many CPAP machines used polyurethane foam inside the device to reduce noise. Over time, that foam can break down from heat, humidity, and cleaning products, releasing particles into the airpath. The G3 X is the first-of-its-kind standard-size PAP to be engineering completely foam-free, removing the risk entirely.
The G3 X comes with the reassurance of a 5-year warranty on the main device (more than double the standard 2 years). If there’s a defect in how it’s made, REACT HEALTH will repair or replace it. Accidents and misuse fall outside of the warranty, and accessories are covered for 3 months.
As always, cpap.com lets you try any CPAP machine for 60 nights, risk-free. If the G3 X is not the right fit, return it for a full refund or store credit.

Everything you wanted and more. For less.

The new G3 X is the Auto CPAP you’ve been waiting for. High-quality. Foam-free. Connected care. Backed by an unheard of 5-year warranty.

Get special launch offer
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