AirSense 11 vs React Health G3 X: Compared

The React Health G3 X (formerly 3B Medical) and the ResMed AirSense 11 both treat obstructive sleep apnea with the same class of therapy: auto-adjusting pressure between 4 and 20 cm H2O, a heated humidifier, and heated tubing in the box. The real choice is what wraps around that therapy. The G3 X is foam-free, costs $873, and carries a 5-year warranty. The AirSense 11 is $1,004, lighter and quieter, and pairs with the most polished app and coaching ecosystem in CPAP. Which one wins comes down to what you value.

One naming clarification before diving in: React Health G3 X, Luna G3 X, and G3X refer to the exact same machine, the G4600 model. It's the newer foam-free successor to the older React Health Luna G3, which is a different, earlier device. This comparison is about the new G3 X against the AirSense 11. If you were actually looking for the older Luna G3, our Luna G3 Certified Pre-Owned is the budget pick to consider instead.

CPAP is one of the most common treatments for obstructive sleep apnea [8], and auto-adjusting delivery, like both of these machines use, is a guideline-backed therapy for adult OSA [6]. Both machines run that same class of treatment, so the real decision here isn't about which one clears your apnea better. It's about the experience, price, and build wrapped around that therapy.

Our CPAP expert Gabriel put the G3 X through a full hands-on review:

"It comes with a 5-year warranty on the device, more than double the usual 2-year standard in this category."

— Gabriel, CPAP Expert, Sleeplay

Watch the full breakdown below:

AirSense 11 vs React Health G3 X at a Glance

Every spec below comes straight from the manufacturers: React Health for the G3 X [1] and ResMed for the AirSense 11 [4]. Where the two machines match, the row says so plainly.

Price at Sleeplay

$1,004

$873

Warranty

2 years

5 years

Sound-Abatement Foam

Standard foam build; ResMed not part of the Philips recall

Foam-free (first standard-size foam-free PAP in the U.S.)

Therapy Modes

AutoSet, AutoSet for Her, fixed CPAP

AutoCPAP (Smart A) and fixed CPAP (SmartC)

Pressure Range

4 to 20 cm H2O

4 to 20 cm H2O (0.5 increments)

Exhale Relief

EPR, off or levels 1 to 3

Reslex, clinician-enabled, levels 1 to 3

Ramp

AutoRamp with sleep onset detection

Auto or 0 to 60 minutes

Humidifier

Integrated HumidAir 11, about 380 ml

Integrated heated, about 360 ml, included

Heated Tubing

ClimateLineAir 11 (sold separately)

Integrated heated tubing (included in box)

Display / Controls

Color touchscreen

3.5 inch color LCD with control knob

Weight

About 2.5 lb (1,130 g)

About 3.75 lb (1.7 kg)

Noise

About 27 dBA

About 28 dBA

Connectivity

Bluetooth + cellular

Built-in 4G cellular, QR code, SD card

Patient App

myAir

React Health patient app (via React Health Connect)

Clinician Platform

AirView

React Health Connect

Guided Setup / Coaching

Personal Therapy Assistant, Care Check-In, Test Drive

None (clinician can message via the app)

Altitude

Up to about 9,870 ft

Up to about 7,545 ft (2,300 m)

Air Travel

FAA compliant

Meets FAA requirements (RTCA DO-160), per React Health

Prescription / FSA-HSA

Rx required, FSA/HSA eligible

The two machines are therapeutic equals. The G3 X wins on price, warranty, a foam-free build, and included heated tubing. The AirSense 11 wins on weight, quietness, the app ecosystem, and built-in coaching.

Same Therapy, Different Machine: What Both Do Identically

Whichever machine you choose, the CPAP therapy you get is the same class of treatment. Neither one is a downgrade in effectiveness.

Both are auto-adjusting (APAP) machines that also run fixed CPAP. Both cover the same 4 to 20 cm H2O pressure range. Both offer exhale relief, EPR on the AirSense 11 and Reslex on the G3 X, along with a ramp feature and an integrated heated humidifier. Both require a prescription and are FSA- and HSA-eligible.

Auto-titrating CPAP devices are an established, AASM-endorsed therapy for treating adult OSA [7], so both auto algorithms here deliver legitimate, guideline-grade treatment. If you're new to this category, our guide to what an auto CPAP machine is and our breakdown of APAP vs CPAP both explain how auto-adjusting therapy actually works.

Because the therapy is equivalent, the rest of this comparison focuses on build, price, comfort, and software. Not about which machine treats your apnea better.

The Foam-Free Difference (and the Philips Recall Context)

The G3 X's headline feature is that it has no sound-abatement foam. That claim needs honest context.

In 2021, the FDA announced a recall of certain Philips Respironics CPAP and BiPAP machines because their sound-abatement foam could degrade over time [5]. For the full story, our Philips Respironics Recall article covers what happened and who it affected.

As per React Health, the G3 X is the first standard-size foam-free PAP sold in the U.S., built without any internal sound-abatement foam [2]. That's a real differentiator for buyers still wary after the recall.

Now, here's the fairness line, stated plainly. Because the G3 X is the first foam-free standard-size PAP [2], the AirSense 11, like other standard machines, uses sound-abatement foam. But the 2021 recall named only Philips Respironics devices [5], so the AirSense 11, made by ResMed, was not included. The foam-free build is a peace-of-mind differentiator for the G3 X. It isn't a safety strike against ResMed.

"If you remember the 2021 Philips foam recall, or you have ever just never trusted what is quietly breaking down inside your device, this next machine was built with you in mind."

— Gabriel, CPAP Expert, Sleeplay

That concern traces back to the Philips devices named in the 2021 recall, not the ResMed AirSense 11 compared here, which was never part of it [5].

Price and Warranty: The Value Story

At Sleeplay, the AirSense 11 is $1,004, and the G3 X is $873, a $131 difference. On paper, that makes the G3 X the strongest cost-to-coverage case in the standard CPAP category.

The G3 X carries a 5-year limited manufacturer warranty, more than double the category-standard 2 years [1]. Both prices include the heated humidifier. The G3 X also includes heated tubing in the box, while the AirSense 11's heated tube, the ClimateLineAir 11, is sold separately. That's a real cost difference worth factoring in beyond the sticker price.

Both machines are ready to order today. Shop the React Health G3 X or the ResMed AirSense 11, both prescription-required and FSA/HSA eligible. If your prescription has lapsed, our online Rx renewal service can get you a current one without a trip to the doctor's office.

If you want the G3 platform at the lowest possible cost, the older Luna G3 Certified Pre-Owned is the value pick below both of these new machines.

Screen, Controls, Size, and Noise

Day-to-day, these two machines feel different in your hands. The AirSense 11 is smaller, lighter, and quieter, with a touchscreen. The G3 X is a bit larger and heavier, with a classic LCD-and-knob interface some users actually prefer in the dark.

The AirSense 11 uses a color touchscreen, while the G3 X uses a 3.5-inch color LCD with a control knob and a home button. Neither is wrong here. It's touch-modern versus tactile-in-the-dark, and plenty of users strongly prefer either.

Size and weight follow a similar pattern. The AirSense 11 weighs about 2.5 lb, while the G3 X weighs about 3.75 lb. The AirSense 11 is the more compact of the two nightstand machines.

On noise level, both offer quiet operation: about 27 dBA for the AirSense 11 and about 28 dBA for the G3 X, per each manufacturer. That difference is unlikely to be noticeable to a sleeper or bed partner. For more on this category's quietest options, our roundup of the 7 quietest CPAP machines covers where both of these land.

"as you can see this is touch screen, the AirSense 10 was not, it had knobs all over the place"

— James Curles, Sleep Coach, Sleeplay

Our reviewer found the G3 X's controls simple, just a knob and a home button, and the machine straightforward to run without needing an app at all.

App and Data: myAir vs React Health Connect

This is where the AirSense 11 pulls ahead. Its myAir app is the most polished patient experience in CPAP, built around a nightly score and ongoing coaching. The G3 X reports through React Health Connect over built-in cellular instead, which is reliable but noticeably less consumer-friendly.

The AirSense 11 pairs with the myAir app over Bluetooth for nightly scoring and coaching, plus the clinician-facing AirView platform your provider uses to check in remotely. To understand what your myAir score means, the Reading Your ResMed myAir Score guide walks you through how to read it.

The G3 X uses a built-in 4G cellular modem, QR-code scanning, and an SD card, reporting through React Health Connect and its own patient app. Your care team can message you directly through that app, which covers the compliance basics well. The trade-off is a less rich consumer experience than myAir offers.

The honest verdict here: if app polish and self-tracking matter to you, the AirSense 11 wins clearly. But if you just want reliable compliance reporting to your provider without fiddling with an app, the G3 X's cellular approach gets the job done.

Auto-Adjusting Performance: AutoSet vs SmartA

Both machines adjust pressure automatically through the night, and both do it to a legitimate clinical standard. ResMed's AutoSet is the long-established name here, while React Health's Smart A is newer to the field.

Auto-titrating PAP therapy is guideline-endorsed for adult OSA [7], so both algorithms are treating apnea to the same accepted standard. That's the baseline before comparing performance data.

In a React Health bench-test study, the G3 X's Smart A algorithm tied for the best obstructive-event correction rate among the six devices tested [3]. But to be honest: that's a manufacturer-commissioned bench study, not an independent clinical trial, and ResMed's AutoSet still carries the longer real-world and clinical track record.

The practical takeaway is that both machines' auto algorithms deliver effective therapy. The AirSense 11 wins on track record, while the G3 X shows it can hold its own in the bench data. For a deeper look at how the G3 X performs day-to-day, our full React Health G3 X review covers it in more detail.

Man wearing a nasal CPAP mask while using the React Health G3 X Auto-CPAP machine

Masks, Tubing, and Supplies

Both machines use standard mask connections, so your mask choice stays wide open no matter which one you pick. The tubing and water chambers are where things get machine-specific.

Both use the standard 22 mm connection and work with essentially any current CPAP mask, whether nasal, nasal pillow, or full face. You can browse CPAP masks to see the full range, or start with a bundle: the G3 X ships in its own mask bundle, and the AirSense 11 has a matching bundle option too.

Tubing works differently between the two. The G3 X includes integrated heated tubing right in the box, while the AirSense 11's heated tube is a separate purchase. Both machines also accept standard non-heated tubing.

Water chambers are machine-specific and not interchangeable: about 360 ml on the G3 X versus about 380 ml on the AirSense 11.

If you want to browse further, the React Health collection covers the G3 X's full lineup, our auto-adjusting CPAP machines collection covers both categories, and the full CPAP machine catalog has everything else.

Which One Should You Buy?

Choose by what you value, not by which brand is louder in the market.

Buy the React Health G3 X if: you want a foam-free machine for peace of mind after the Philips recall, you want the longest warranty in the category (5 years), you want heated tubing included in the box, or you want strong auto-adjusting therapy for $131 less.

Buy the ResMed AirSense 11 if: You want the most polished app and coaching experience available, with myAir, Personal Therapy Assistant, and Care Check-In all built in, plus the lightest and quietest machine here, the built-in AutoSet for Her mode, and the reassurance of the category's most established brand and resale value.

Either way, both machines treat your apnea to the same standard. There's no wrong therapy choice here, only a different experience wrapped around it.

For more options, our best CPAP machines of 2026 roundup and our guide on how to buy a CPAP machine can help you compare beyond just these two.

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FAQs

Which is better, the ResMed AirSense 11 or the React Health G3 X?

Neither machine is better at treating sleep apnea. Both are auto-adjusting devices with the same 4 to 20 cm H2O pressure range. The AirSense 11 leads on app experience, weight, and quietness. The G3 X leads on price, a 5-year warranty, and a foam-free build. The better choice depends on what matters most to you.

Is the React Health G3 X really foam-free?

Yes. Per React Health, the G3 X is the first standard-size PAP device sold in the United States built without internal sound-abatement foam. That foam type was at the center of the 2021 Philips Respironics recall, making the foam-free design a meaningful differentiator for buyers who have concerns following that recall.

Is the AirSense 11 affected by the Philips foam recall?

No. The 2021 recall named only Philips Respironics devices. The AirSense 11 is made by ResMed and was not included in the recall. Like most standard CPAP machines, it uses sound-abatement foam internally, but it was not recalled and is not affected by any related action.

How much cheaper is the G3 X than the AirSense 11?

The G3 X is priced at $873 and the AirSense 11 at $1,004, a difference of $131. The G3 X also includes heated tubing in the box, while the AirSense 11 heated tube is sold as a separate accessory, which widens the effective price gap further.

Do the AirSense 11 and React Health G3 X use the same masks?

Yes. Both machines use the standard 22 mm connection and are compatible with virtually any current CPAP mask, including nasal, nasal pillow, and full face styles. Your mask choice does not need to change when switching between these two machines.

Which machine is quieter, the AirSense 11 or the G3 X?

Both machines are very quiet and very close in measured noise: approximately 27 dBA for the AirSense 11 and approximately 28 dBA for the G3 X, per the respective manufacturers. The difference is small enough that most sleepers and bed partners would not notice it.

Does the React Health G3 X work with an app like myAir?

The G3 X transmits therapy data through React Health Connect via built-in cellular, and includes a patient app with QR-code-based setup. It reliably meets compliance reporting needs, though the overall app experience is less consumer-polished than the AirSense 11 myAir app, which offers a nightly score and guided coaching.

Is the React Health G3 X the same as the Luna G3?

No. The G3 X is React Health's newer foam-free CPAP machine, model number G4600. The Luna G3 is an older device that does not share the foam-free build. The names "Luna G3 X" and "React Health G3 X" are often used interchangeably for the newer machine, but the plain "Luna G3" refers to the older model, which is available as a certified pre-owned option.

The Bottom Line

Same therapy, two philosophies. The React Health G3 X is the foam-free value play: lower price, longer warranty, heated tubing included. The ResMed AirSense 11 is the polished flagship: lighter, quieter, and wrapped in the best app and coaching in CPAP. Pick the one whose strengths match your priorities.

Ready to decide? Shop the React Health G3 X or the ResMed AirSense 11, or browse the full range of auto-adjusting CPAP machines to compare more options on Sleeplay.

Sources

React Health. "G3 X APAP Device." Official product and specifications page. https://www.reacthealth.com/product/g3x-apap-device
React Health. "Foam Free." Official page. https://www.reacthealth.com/foamfree
React Health. "G3 X Bench Test Study Summary." Manufacturer-commissioned bench study. https://www.reacthealth.com/uploads/userfiles/files/documents/MI_MK_0411_Rev_A_G3_X_Bench_Test_Study_Summary.pdf
ResMed. "AirSense 10 vs AirSense 11 Guide." Official ResMed guidance. https://www.resmed.co.in/blogs/airsense-10-vs-airsense-11-guide
U.S. Food and Drug Administration. "Certain Philips Respironics Ventilators, BiPAP, and CPAP Machines Recalled." https://www.fda.gov/medical-devices/safety-communications/certain-philips-respironics-ventilators-bipap-and-cpap-machines-recalled-due-potential-health-risks
Patil SP, et al. "Treatment of Adult Obstructive Sleep Apnea With Positive Airway Pressure: An AASM Systematic Review, Meta-Analysis, and GRADE Assessment." J Clin Sleep Med, 2019. https://pubmed.ncbi.nlm.nih.gov/30736888/
Morgenthaler TI, et al. "Practice parameters for the use of auto-titrating continuous positive airway pressure devices for titrating pressures and treating adult patients with obstructive sleep apnea syndrome." Sleep, 2008. https://pubmed.ncbi.nlm.nih.gov/18220088/
Cleveland Clinic. "CPAP Machine." https://my.clevelandclinic.org/health/treatments/22043-cpap-machine

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Oluwaseun Adeola

Sleep Health Writer

Oluwaseun Adeola is a sleep health writer at Sleeplay, focused on CPAP therapy and sleep apnea solutions. He reviews machines, masks, and travel gear, turning complex details into clear, practical guidance. His work helps readers choose with confidence, improve comfort, and ultimately sleep better and live better.

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Lilly Perez, RRT

Certified Respiratory Therapist

Certified Respiratory Therapist with 18+ years of experience in respiratory care, specializing in sleep apnea education and patient-centered therapy. Extensive background working with Durable Medical Equipment (DME) providers and clinical teams to support patients with the setup and use of CPAP, BiPAP, and other positive airway pressure (PAP) devices.For over a decade, I’ve conducted high-volume in-home and virtual consultations, educating patients on the causes and impact of sleep apnea, available treatment options, and the clinical benefits of consistent therapy use. My focus is on improving patient understanding, driving adherence, and helping individuals achieve better long-term sleep and respiratory health.

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