Every guide on CPAP Community, grouped by where you are in treatment. Each one is written by our editorial team and cites its clinical sources in the text, so you can check any claim against the original. We sell no CPAP equipment and none of this is medical advice.
Start here
- What does CPAP stand for? Meaning and how it works — what the acronym means and how the therapy works, in the plainest terms.
- What does a CPAP machine do? — the mechanics: what the motor, hose, humidifier and mask each do.
CPAP Machines
How the devices work, how the types differ, and what to check before you buy or upgrade.
- CPAP machines: types, features and care explained — the full overview: how they work, features, cleaning and replacement.
- Types of CPAP machines: CPAP vs APAP vs BiPAP compared — fixed CPAP, auto-adjusting APAP, bilevel BiPAP and travel units compared.
- What does a CPAP machine do? — what the therapy actually does to your airway.
- CPAP machines for sale: the 2026 buying guide — prices, retailers, insurance vs cash, warranties and red flags.
CPAP Masks
The part of the system most people struggle with, and the one that decides whether therapy sticks.
- Types of CPAP masks: nasal, full face and pillow masks compared — nasal, nasal pillow, nasal cradle, full-face and hybrid masks, by sleep position, breathing style and pressure.
Getting Started With CPAP
Sleep studies, AHI results, prescriptions, FDA rules and insurance — what happens between diagnosis and your first night on therapy.
- What does CPAP stand for? Meaning and how it works — the terminology, before anything else.
- Can I buy a CPAP machine without a prescription? — why CPAP is a prescription device, and how to get a prescription.
- Sleep studies and your AHI result, explained — what the test measures and what the number decides.
Living With CPAP
Adherence, side effects, naps, cleaning and the long-term health picture.
- Is it bad to use CPAP all the time? — whether continuous use is safe, and which side effects are normal.
- CPAP machine benefits: what improves, and how soon — what improves, how soon, and how much use it takes.
How we source these guides
Clinical statements are traced to primary sources — the NHLBI, the FDA, CMS, the AASM and NIH / NCBI StatPearls — and cited in the text. Read more about how we work, or see our medical disclaimer.
Every guide, newest first
This list updates itself as new guides are published.
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Sleep studies and your AHI result, explained
What a sleep study measures, how apneas and hypopneas are counted, why two labs can report different numbers for the same night, and what your AHI decides next.
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What does CPAP stand for? Meaning and how it works
CPAP stands for continuous positive airway pressure. What each word actually means, how the pressure holds your airway open overnight, and who the therapy is prescribed for.
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CPAP machines: types, features and care explained
The full picture on CPAP devices: how they work, CPAP vs APAP vs BiPAP, humidifiers and ramp features, cleaning schedules, and when a machine needs replacing.
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Types of CPAP machines: CPAP vs APAP vs BiPAP compared
Fixed CPAP, auto-adjusting APAP, bilevel BiPAP and travel units compared — what each does, who it suits, and why your sleep study rather than your preference decides.
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Can I buy a CPAP machine without a prescription?
No, not legitimately in the US: CPAP is a prescription device. What the federal rule actually says, how to get a prescription, and the legal alternatives if therapy is the barrier.
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Types of CPAP masks: nasal, full face and pillow masks compared
Nasal, nasal pillow, nasal cradle, full-face and hybrid masks compared — and how to narrow the field by sleep position, breathing style, pressure level and face shape.
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Is it bad to use CPAP all the time?
No — CPAP is meant for every sleep, naps included, and dependency is a myth. Why continuous use is safe, which side effects are normal, and when to call your clinic.
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CPAP machines for sale: the 2026 buying guide
Prescription rules, realistic price ranges, insurance versus paying cash, how to judge a retailer, warranties, recall traceability and the red flags worth walking away from.
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CPAP machine benefits: what improves, and how soon
Better sleep and less snoring come first; blood pressure, stroke risk and cognitive benefits build over months. What improves, how soon, and how much nightly use it takes.
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What does a CPAP machine do?
A CPAP machine filters room air, pressurises it and pushes it through a mask to splint your airway open. The mechanics, the parts, typical pressures and what to expect.