Every CPAP product page lists the same comfort features: a heated humidifier, a ramp, exhalation relief, and auto-adjusting air pressure. But only one of them has trial evidence showing that people use their machine more when they have it. The rest are real comforts on the first nights that fade or vary by person. This guide breaks down which features matter for your situation, which are nice to have, and which you can skip without losing anything.
Heated humidification is the feature with the strongest evidence. In a controlled study, people used CPAP about 35 minutes more per night with heated humidity than without it [5]. Auto-adjusting pressure adds roughly 13 minutes of nightly use [1]. Ramp and exhalation relief help you settle in, but pooled trials show no lasting change in how much people use their machine [7].
If you're choosing your first machine, or deciding whether an upgrade is worth it, use the situation table in section 6 and the spec table in section 8. If you already own a machine and want to adjust these settings, our CPAP pressure settings guide explains what you can change yourself and what your provider sets. For the wider buying checklist, covering noise, size, cost, warranty, and data, our how to choose a CPAP machine guide has that covered. We won't repeat it here.
At a Glance
- Must-have: Heated humidification (more nightly use in a controlled trial; recommended by the AASM practice parameters).
- Worth having: Auto-adjusting pressure if your doctor allows it (about 13 more minutes of use per night; not for people with heart failure, COPD, central apnea, or hypoventilation).
- Nice to have: Ramp and exhalation relief (EPR). Real comfort while you adapt; no lasting effect on use in pooled trials.
- Skip unless you want it: App data, automatic tube temperature, auto start. Convenience, not therapy.
Which CPAP Features Actually Matter?
Three questions sort every comfort feature: does it change how much you use the machine, does it change how you feel on night one, and does it change your therapy numbers? Only heated humidification and auto-adjusting pressure move the first one in trials. None of the four changes the third. All four can change the first nights.
Tier 1, changes nightly use: heated humidification. In a crossover study of 38 patients, CPAP use with heated humidity was 5.52 hours per night versus 4.93 without humidity, and dry mouth, throat, and nose were reported less often [5]. AASM practice parameters recommend heated humidification to improve CPAP utilization [6], and the 2019 AASM guideline notes that heated humidification reduces some PAP-related side effects [3].
Tier 2, modest gain in use, no change in outcomes: auto-adjusting pressure. Auto-CPAP probably increases machine usage by about 13 minutes per night, while sleepiness scores don't improve in a clinically meaningful way and AHI is slightly lower with fixed CPAP [1]. An earlier review found 11 more minutes per night and called the clinical importance unclear [2].
Tier 3, comfort now, no lasting effect on use: ramp and exhalation relief. A meta-analysis of seven trials (514 patients) found flexible pressure delivery didn't improve compliance over standard CPAP (0.16 hours, p = .21) and improved no secondary outcome [7]. We found no adherence trial for ramp in the sources we checked; it's a comfort setting that manufacturers and the Mayo Clinic describe for the first minutes of the night [10].
| Feature | Changes nightly use? | Changes therapy numbers? | Comfort on night one? | Verdict | Source |
|---|---|---|---|---|---|
| Heated humidification | Yes: +35 min per night in a crossover trial | No | Yes: fewer dry mouth, nose and throat complaints | Must-have | Massie 1999; Kushida 2006 |
| Auto-adjusting pressure (APAP) | Modest: about +13 min per night | No; AHI slightly lower with fixed CPAP | Often, at lower average pressure | Worth having if your doctor allows it | Cochrane 2019; Patil 2019 |
| Exhalation relief (EPR, Reslex, AirRelief) | No, pooled trials | No | Yes: less dry mouth on night one, gone by week 7 | Nice to have | Bakker 2011; Nilius 2006 |
| Ramp / AutoRamp | No trial found | No | Yes: lower start pressure while you fall asleep | Nice to have; try it, then turn it off | Mayo Clinic; AirSense 11 user guide |
Do You Need a Heated Humidifier?
Yes for most people, and it's the one comfort feature backed by usage data. Heated humidification warms and moistens the air so the nose and throat don't dry out, and in a controlled study, people used their CPAP about 35 minutes more per night with it than without it. If you live in a humid climate, breathe through your nose and never wake up dry, you may be fine on a low setting or none.
Who needs it: Anyone with a dry nose, dry mouth, or sore throat on CPAP, including those using a nasal pillow; mouth breathers (pair a full-face mask or nasal pillow mask with humidification; see our guide to CPAP masks for mouth breathers); dry climates and winter heating; higher pressures. Mayo Clinic lists a heated humidifier that attaches to the machine, and a heated tube, as the fix for a dry or stuffy nose [10].
Who can skip or lower it: Humid climates and people who never wake dry (turn it down or use auto mode); travelers who prefer a waterless heat-moisture exchanger, HumidX on the AirMini or AirMist HME on the Transcend Micro 510, over carrying distilled water.
In a crossover study of 38 patients with obstructive sleep apnea, CPAP use averaged 5.52 hours per night with heated humidity versus 4.93 hours without humidity, and dry mouth, throat, and nose were reported less often [5]. AASM practice parameters recommend heated humidification and a systematic educational program to improve CPAP utilization [6].
AirSense 11: Climate Control Auto or Manual, Humidity Level Off or 1 to 8, tube temperature automatic only with the ClimateLineAir 11 heated tube [11].
Luna G3: humidifier Off, Auto, or 1 to 5 with a preheat function [15].
G3 X: Off, 1 to 5 or Auto, preheat, heated tube [16].
AirMini: waterless HumidX and HumidX Plus cartridges, replaced within 30 days [13].
Transcend Micro 510: AirMist HME waterless humidification that recycles the moisture from your own breath [17].
You can browse heated humidifiers that attach to the machine in our CPAP Humidifiers collection, and pair them with the ClimateLineAir 11 heated tube. For rainout, condensation, and seasonal settings, our CPAP in summer guide covers rainout in full. For the complete rundown of humidifier types and cleaning, our CPAP humidifier guide is the deeper resource, and if dry mouth is your main complaint, our CPAP dry mouth guide walks through the causes.
"Now, humidification warms and moisturizes CPAP airflow so your airway stays comfortable and open."
"Now, if you live in a dry climate, you need heated humidity plus heated tubing. If you live in a place with a humid climate, lower humidity usually works, or even auto mode."
— Lilly Perez, Respiratory Therapist, Sleeplay
Does Ramp Time Matter?
Ramp matters in your first weeks, especially if the full pressure feels too much to fall asleep with. After that, most people turn it down or off. Ramp starts CPAP therapy at a low pressure and climbs to your prescribed pressure over a set number of minutes, and no adherence trial in the sources we checked shows it changes how much people use CPAP over time.
Who benefits: New users still adapting; people with a high prescribed pressure; anyone who wakes up during the night and needs to fall back asleep (an auto ramp restarts at the low pressure when it senses you're awake). The Mayo Clinic describes ramp as a setting for people bothered by forced air or claustrophobia [10].
Who can skip it: People on auto-adjusting machines whose minimum pressure is already low, and anyone who wakes when the ramp ends. Our ramp guide covers that exact problem. Once you're used to therapy, a long ramp only delays effective treatment.
AirSense 11: Ramp Time Off, 5 to 45 minutes in 5-minute steps, or Auto (AutoRamp), defined as the period during which the pressure increases from a low start pressure to the prescribed treatment pressure [11].
AirSense 10: AutoRamp delivers a low air pressure to help you fall asleep, then steadily increases to your prescribed level [14].
AirCurve 11 VAuto: Ramp Time Off or 5 to 45 minutes [12].
Luna G3 and G3 X: ramp 0 to 60 minutes [15] [16].
AirMini: Ramp Time enabled by default, changed in the AirMini app [13].
Transcend Micro 510: GentleRise ramp [17].
For what ramp does, the common problems like waking when the target pressure arrives and restarting the ramp, and how to set it, our ramp guide covers it in full. For what your prescribed pressure actually means, our CPAP pressure settings guide breaks it down.
Is EPR (Exhalation Relief) Worth It?
Worth trying, not worth paying extra for. Exhalation relief drops the pressure slightly each time you breathe out (ResMed calls it EPR, React Health calls it Reslex, Transcend calls it AirRelief). Trials show it makes the first night more comfortable, with less dry mouth, but pooled data show no lasting gain in how much people use their machine or in their results.
A meta-analysis of seven trials with 514 patients found that flexible pressure delivery didn't improve compliance compared with standard CPAP (0.16 hours, p = .21) or any secondary outcome [7]. In a crossover study, pressure-relief CPAP and constant CPAP were comparable in treating apnea; patients had less dry mouth on the first night, and the difference was gone after seven weeks [8]. One earlier study found more use in the flexible-pressure group over three months but no consistent improvement in clinical outcomes [9].
Who benefits: People who feel they're fighting the air on exhale, those on higher pressures, and those in the first weeks of therapy. It's a setting, not a purchase: every machine in the table below includes some form of it.
Who can skip it: People whose pressure already feels easy; anyone whose provider has set it off, because it lowers the exhale pressure (on the AirSense 11, EPR reduces pressure during expiration by 1, 2, or 3 cmH2O and never below 4.0 cmH2O [11]).
AirSense 11: EPR Off, Level 1 = 1.0, Level 2 = 2.0, Level 3 = 3.0 cmH2O [11].
Luna G3 and G3 X: Reslex Off or 1 to 3; the higher the number, the more pressure the device reduces [15] [16].
AirMini: Pressure Relief enabled by default, changed in the app [13].
Transcend Micro 510: AirRelief exhalation pressure relief [17].
AirCurve 11 VAuto is a bilevel machine: it uses a separate lower exhalation pressure (pressure support 0 to 10 cmH2O) instead of EPR [12].
For what EPR is and how it differs from bilevel, our guide to what EPR feels like covers it (ResMed calls it EPR). For signs that pressure feels too high and what to do about it, our guide on whether your CPAP pressure is too high is the place to look if you're fighting the air. When exhale relief isn't enough, and a doctor moves someone to BiPAP, our CPAP vs BiPAP comparison explains why.
Do You Need Auto-Adjusting Pressure?
Most people without other lung or heart conditions do well on either, and auto-adjusting pressure buys a modest amount of extra use: about 13 minutes more per night in the Cochrane review. It doesn't improve results. If you have heart failure, COPD, central sleep apnea, or hypoventilation, the AASM doesn't recommend auto-adjusting CPAP devices at all, and your doctor will prescribe fixed pressure set in a lab.
"Auto-CPAP probably increases machine usage by about 13 minutes per night. The effects on daytime sleepiness scores with auto-CPAP are not clinically meaningful. AHI values are slightly lower with fixed CPAP" [1]. The AASM guideline found that auto-adjusting or bilevel PAP did not result in clinically significant differences in patient outcomes compared with standard CPAP [3]. The AASM practice parameters for auto-titrating devices state they're not recommended for patients with congestive heart failure, significant lung disease such as COPD, conditions that cause nocturnal desaturation other than OSA, non-snorers, or central sleep apnea [4].
Who benefits: People whose pressure needs change with position, weight, or alcohol; people who feel a fixed pressure is too high on light-sleep nights; anyone whose prescription came from a home sleep test rather than an in-lab titration. Auto machines can also run a fixed CPAP mode, so an AutoSet isn't a one-way choice: the AirSense 11 AutoSet offers AutoSet, AutoSet for Her and "fixed" CPAP modes [11].
Who should not use it: The groups above. If your diagnosis includes heart failure, COPD, central apneas, or hypoventilation, auto-adjusting isn't for you, and your sleep physician will set a fixed pressure.
Every machine in section 8 is an auto-adjusting model that can also run fixed pressure; our Auto Adjusting CPAP Machines collection lists them well. For how the algorithm decides your pressure, our guide on whether auto-adjusting pressure is right for you walks through it, and our APAP vs CPAP comparison covers fixed pressure as the alternative. For the CPAP, APAP, BiPAP, and travel categories, our types of CPAP machines guide is the place to start if lung or heart conditions are part of the picture.
Which Features Matter for Your Situation?
Match the feature to the problem you actually have, not to the longest spec sheet. The table below is the short version; each row links to the guide that goes deeper.
| Your situation | Prioritize | Can skip | Go deeper |
|---|---|---|---|
| First machine, still adapting | Heated humidifier; ramp on for the first weeks; EPR on to try | App data, auto tube temperature | First 30 days on CPAP |
| Dry mouth or dry nose or skin irritation | Heated humidifier plus heated tube; check mask fit first | Ramp | CPAP dry mouth |
| Mouth breather | Full face mask plus heated humidification; chin strap if advised | EPR is optional | CPAP masks for mouth breathers |
| Dry climate or winter heating | Heated humidifier with a heated tube, higher levels | Waterless HME at home | CPAP in summer: humidity and rainout |
| High prescribed pressure | Ramp or AutoRamp; EPR; ask about bilevel if exhaling still feels hard | Nothing else changes the pressure itself | CPAP vs BiPAP |
| Frequent traveler | Waterless humidification (HumidX, AirMist HME), lightweight, FAA-approved machine | Water humidifier on the road | Best travel CPAP machines |
| Light sleeper or bed partner sensitive to noise | Quiet machine (27 dBA class), heated tube to avoid water noise | Ramp after the first weeks | Quietest CPAP machines |
| Wants to track therapy or share data with a provider | App and cellular reporting (myAir, React Health app) | Not a therapy feature; skip if you never look | Best CPAP machines of 2026 |
For frequent travelers, an FAA-approved machine and a light build matter as much as the humidification type; our AirMini vs Transcend Micro comparison weighs both, and our Travel CPAP Machines collection covers the lightweight lineup. For high prescribed pressure, our Bilevels and BiPAP Machines collection is worth a look if exhaling still feels hard even with EPR turned up.
The 27 dBA figure in that table is the AirSense 11's sound pressure level, measured with the HumidAir 11 humidifier chamber per ISO 80601-2-70 [11], not a blanket claim for every machine we carry.
Features That Do Not Change Outcomes (and Ones You Can Skip)
None of the four comfort features change your apnea numbers, and two of them don't change how much you use the machine either. That's not a reason to avoid them. It's a reason to stop paying for them as if they were therapy.
Exhalation relief: No compliance or outcome gain in pooled trials [7].
Auto-adjusting or bilevel pressure shows no clinically significant difference in outcomes versus standard CPAP in the AASM review [3]. The gain is minutes of use, not results.
Automatic tube temperature, auto start and stop (SmartStart and SmartStop on ResMed, Auto On on React Health), and app reporting are convenience features the manufacturers describe with no outcome claims [11] [16].
What changes outcomes is wearing the machine every night: the AASM review found PAP reduces disease severity, sleepiness, blood pressure, and motor vehicle accidents compared with no treatment [3].
Pick the features that make you want to put the mask and headgear on. Then judge the machine by whether you did. Newer models like the AirSense 11 add more convenience than therapy over the AirSense 10, and our AirSense 11 vs AirSense 10 comparison breaks down exactly what changed.
How the Machines We Sell Compare on These Features
Every machine below is an auto-adjusting model with some form of ramp and exhalation relief, so the real differences are the humidifier type, the heated tube, and the travel trade-offs. Specs come from the manufacturers' user guides and product pages; every cell below is verified and sourced.
| Machine | Ramp | Exhalation relief | Humidifier | Heated tube | Source |
|---|---|---|---|---|---|
| ResMed AirSense 11 AutoSet | Off, 5 to 45 min, or Auto | EPR Off, 1, 2, 3 cmH2O | Integrated HumidAir 11, Climate Control, level Off or 1 to 8 | ClimateLineAir 11, automatic temperature | AirSense 11 user guide |
| React Health Luna G3 | 0 to 60 min | Reslex Off, 1 to 3 | Integrated heated, Off, Auto or 1 to 5, preheat | Optional heated tubing | Luna G3 manual |
| React Health G3 X | 0 to 60 min | Reslex Off, 1 to 3 | Integrated heated, Off, 1 to 5 or Auto, preheat | Heated breathing tube | G3 X manual |
| ResMed AirMini | Enabled by default, set in app | Pressure Relief, set in app | Waterless HumidX or HumidX Plus, replace within 30 days | None | AirMini user guide |
| Transcend Micro 510 | GentleRise ramp | AirRelief | Waterless AirMist HME | None | Transcend Micro 510 product page |
| ResMed AirCurve 11 VAuto | Off or 5 to 45 min | Bilevel pressure support 0 to 10 cmH2O instead of EPR | Integrated HumidAir 11, Climate Control, level Off or 1 to 8 | ClimateLineAir 11 | AirCurve 11 user guide |
One more thing worth mentioning, even though it's not in the table above: the ResMed AirSense 10 AutoSet is the previous-generation auto-adjusting machine with an integrated humidifier, AutoRamp, three therapy modes (AutoSet, AutoSet for Her and CPAP) and the ClimateLineAir heated tube as an option [14]. ResMed simply publishes fewer details on its current product page, which is why it's mentioned here rather than in the main table.
Sound, where the manufacturer actually publishes it, is worth knowing: the AirSense 11 runs at 27 dBA with the HumidAir tub and the AirCurve 11 at 26 dBA [11] [12], the AirMini at 30 dBA [13], and the Transcend Micro 510 at 27 dBA [17]. The React Health guides don't list a dBA figure in the text we could read, so the Luna G3 and G3 X get no sound claim here.
For a home machine with the fullest comfort set, the AirSense 11 and the G3 X are the two with automatic humidity and heated tubing out of the box; our React Health G3 X review covers that model in full. For value with the same core features, look at the Luna G3. For travel, it comes down to waterless humidification on the AirMini versus the Transcend Micro 510, and our guide on what's new with the Transcend Micro 510 is worth reading before you decide. You can compare all of them side by side in our CPAP machines collection.
The Bottom Line
Buy the heated humidifier. Take auto-adjusting pressure if your doctor allows it. Try ramp and exhalation relief, then turn them down as you adapt. Everything else is convenience, and convenience is fine as long as you know that's what you're paying for.
Not sure which machine fits those priorities? Take our CPAP combo quiz, or browse every CPAP machine we carry. Every one of them requires a prescription, and here's how to get one if you don't have it yet. For the full step-by-step purchase path, covering prescription, insurance and where to buy, our how to buy a CPAP machine guide walks through it. Looking to save on CPAP supplies and accessories? Our CPAP bundles collection ships the machine with a mask, tube, and filters together, and FSA/HSA-eligible machines let you pay with pre-tax dollars.
New machines come with a 2-Year Warranty (3 years on the Transcend Micro 510), a 60-Night Guarantee, and a Price Match Guarantee, and you can split the cost with Dream Now, Pay Later.
FAQ
Which CPAP feature matters most for a first-time user?
Heated humidification. It is the only comfort feature tied to more nightly use in a controlled clinical trial, adding approximately 35 minutes of use per night. The American Academy of Sleep Medicine practice parameters specifically recommend heated humidification to improve CPAP utilization. While ramp helps during the first few minutes of therapy, humidification benefits your comfort every night.
Is auto-adjusting CPAP better than fixed pressure?
Not in clinical outcomes. Auto-CPAP adds approximately 13 minutes of use per night, but improvements in sleepiness are not clinically meaningful, and AHI is slightly lower with fixed CPAP according to Cochrane 2019 research. Auto-adjusting is not recommended for patients with heart failure, COPD, central apnea, or hypoventilation.
Do I need a heated humidifier for CPAP?
Most people do. In a crossover trial, CPAP use increased from 4.93 to 5.52 hours per night with heated humidity, and patients reported fewer complaints of dry mouth and dry nose. You can skip or reduce heated humidification only if you live in a humid climate and consistently wake without dryness.
Do I need to use ramp every night?
No. Ramp is a comfort setting that starts at a lower pressure while you fall asleep, but no clinical trial shows it changes long-term CPAP use. Use it while you are adapting to therapy or if you wake frequently during the early night, then reduce it once full pressure feels normal to you.
What does EPR do, and do I need it?
EPR, or Expiratory Pressure Relief, lowers the delivered pressure by 1 to 3 centimeters of water during exhalation. One study found it reduced dry mouth on the first night, but a meta-analysis of seven trials found no improvement in compliance or clinical outcomes. Try it and keep it only if you notice a comfort improvement.
Is Climate Control worth paying more for?
It is a convenience feature, not a therapeutic one. Climate Control automatically maintains consistent humidity and tube temperature to prevent rainout and dryness without manual adjustment. It requires a heated tube to function. No clinical outcome study exists for this feature, so purchase it only if you prefer fewer settings to manage.
Which CPAP machine is easiest to get used to?
One with heated humidification, a ramp function, and adjustable exhalation relief, combined with auto-adjusting pressure if your doctor permits it. New users notice these comfort features most, not the brand. Every machine in standard comparison tables includes all three of these essential comfort options.
Which comfort features matter most for travel?
Waterless humidification and low weight are the priorities for travel. Heat and moisture exchangers such as HumidX on the AirMini and HME models on portable machines recycle moisture from your exhaled breath, so you can skip distilled water and still avoid dryness during travel.
Can I skip comfort features and use a basic fixed-pressure CPAP?
Yes. Fixed pressure treats sleep apnea just as effectively as auto-adjusting pressure, which only adds minutes of nightly use. Patients with heart failure, COPD, central apnea, or hypoventilation should use a fixed-pressure device set by their physician rather than an auto-adjusting machine.
References
- Kennedy B, Lasserson TJ, Wozniak DR, Smith I. "Pressure modification or humidification for improving usage of continuous positive airway pressure machines in adults with obstructive sleep apnoea." Cochrane Database of Systematic Reviews. 2019;12:CD003531. PMID 31792939. https://pubmed.ncbi.nlm.nih.gov/31792939/
- Ip S, D'Ambrosio C, Patel K, et al. "Auto-titrating versus fixed continuous positive airway pressure for the treatment of obstructive sleep apnea: a systematic review with meta-analyses." Systematic Reviews. 2012;1:20. PMID 22587875. https://pubmed.ncbi.nlm.nih.gov/22587875/
- Patil SP, Ayappa IA, Caples SM, 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." Journal of Clinical Sleep Medicine. 2019;15(2):301-334. PMID 30736888. https://pubmed.ncbi.nlm.nih.gov/30736888/
- Morgenthaler TI, Aurora RN, Brown T, et al. "Practice parameters for the use of autotitrating continuous positive airway pressure devices for titrating pressures and treating adult patients with obstructive sleep apnea syndrome." Sleep. 2008;31(1):141-147. PMID 18220088. https://pubmed.ncbi.nlm.nih.gov/18220088/
- Massie CA, Hart RW, Peralez K, Richards GN. "Effects of humidification on nasal symptoms and compliance in sleep apnea patients using continuous positive airway pressure." Chest. 1999;116(2):403-408. PMID 10453869. https://pubmed.ncbi.nlm.nih.gov/10453869/
- Kushida CA, Littner MR, Hirshkowitz M, et al. "Practice parameters for the use of continuous and bilevel positive airway pressure devices to treat adult patients with sleep-related breathing disorders." Sleep. 2006;29(3):375-380. PMID 16553024. https://pubmed.ncbi.nlm.nih.gov/16553024/
- Bakker JP, Marshall NS. "Flexible pressure delivery modification of continuous positive airway pressure for obstructive sleep apnea does not improve compliance with therapy: systematic review and meta-analysis." Chest. 2011;139(6):1322-1330. PMID 21193533. https://pubmed.ncbi.nlm.nih.gov/21193533/
- Nilius G, Happel A, Domanski U, Ruhle KH. "Pressure-relief continuous positive airway pressure vs constant continuous positive airway pressure: a comparison of efficacy and compliance." Chest. 2006;130(4):1018-1024. PMID 17035433. https://pubmed.ncbi.nlm.nih.gov/17035433/
- Aloia MS, Stanchina M, Arnedt JT, Malhotra A, Millman RP. "Treatment adherence and outcomes in flexible vs standard continuous positive airway pressure therapy." Chest. 2005;127(6):2085-2093. PMID 15947324. https://pubmed.ncbi.nlm.nih.gov/15947324/
- Mayo Clinic. "CPAP machines: Tips for avoiding 10 common problems." https://www.mayoclinic.org/diseases-conditions/obstructive-sleep-apnea/in-depth/cpap/art-20044164
- ResMed. AirSense 11 User Guide (Americas). https://document.resmed.com/documents/products/machine/airsense-11/user-guide/airsense11_user-guide_amer_mul.pdf
- ResMed. AirCurve 11 User Guide (Americas). https://document.resmed.com/documents/products/machine/aircurve-11/user-guide/398195_aircurve-11_user-guide_amer_multi.pdf
- ResMed. AirMini User Guide (EN-UK). https://shop.resmed.com/medias/sys_master/root/hba/h5d/8825148964894/38122-ResMed-AirMini-User-Guide-EN-UK.pdf
- ResMed. "AirSense 10 AutoSet Machine with ClimateLineAir Heated Tubing" (product page). https://eshop.resmed.com/products/airsense-10-autoset-machine
- React Health. Luna G3 Auto CPAP User Manual. https://www.reacthealth.com/uploads/userfiles/files/documents/RH_User%20Manual_%20Auto%20CPAP_V2_1(1).pdf
- React Health. G3 X APAP User Manual. https://www.reacthealth.com/uploads/userfiles/files/documents/G3%20X%20APAP%20manual%20V1_0.pdf
- Transcend (Somnetics). "Transcend Micro 510 Auto CPAP" (product page). https://mytranscend.com/product/transcend-micro-510-auto-cpap/
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