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What Are the Different Types of CPAP Machines?

Lauren Fountain

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Lauren Fountain, Certified Sleep Coach

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Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder. People with OSA experience frequent breathing disruptions while sleeping. This often leads to daytime sleepiness and other symptoms associated with poor sleep quality, like trouble concentrating and irritability.

Continuous positive airway pressure (CPAP) therapy is the standard treatment for sleepers diagnosed with OSA. However, a one-size-fits-all approach doesn’t work for everyone. Some people with OSA may find traditional CPAP machines uncomfortable or may need a more customized approach.

Different types of CPAP machines can address the unique needs of individual sleepers. We’ll discuss the types of CPAP machines, how they work, and who may benefit from using them.


CPAP Machine Types

Positive airway pressure (PAP) is a noninvasive mechanical ventilation therapy. A PAP machine delivers pressurized air to open the airways of sleepers with OSA or other breathing conditions.

PAP setups usually consist of a mask, a hose, and a small tabletop unit that plugs into a wall outlet. The mask creates a seal over your nose and mouth or just your nose. The hose connects the mask to the PAP machine, which pressurizes and pumps air to the mask.

PAP machines measure pressure in centimeters of water (cm H2O). Therapeutic pressure settings usually range from 4 to 20 cm H2O, with 10 cm H2O being an average CPAP pressure setting for people diagnosed with OSA. However, different types of machine vary in their pressure levels, pressure adjustments, and size.

While CPAP is sometimes used as a catchall term, there are several types of PAP machines:

  • CPAP machines: Continuous positive airway pressure is the most common type of PAP therapy. CPAP machines provide constant pressure to keep your upper airway open as you sleep.
  • APAP machines: Automatic positive airway pressure (APAP) machines can raise or lower the pressure based on your breathing patterns. This is often more comfortable for sleepers whose pressure needs change between sleep positions or sleep cycle stages, or those who have trouble tolerating CPAP therapy.
  • BiPAP machines: Bilevel positive airway pressure (BiPAP) machines have two pressure settings, switching between a higher pressure as you inhale and a lower pressure as you exhale. BiPAP machines often have a wider pressure range, reaching up to 25 cm H2O.
  • Travel CPAP machines: Travel CPAP machines work like traditional CPAP machines but have a more portable design. These devices are usually small and lightweight. Some models are also FAA-approved and can be used in flight, though specific policies may vary by airline.

Key Differences Between PAP Machines

The biggest difference between PAP machines is their pressure settings. CPAP and travel CPAP machines administer a steady level of pressure. APAP machines automatically adjust their pressure output based on your breathing, and BiPAP machines have different settings for inhalation and exhalation.

Breakdown of PAP Machine Types

Design Features Benefits Cost
CPAP CPAP machines are designed to deliver a constant level of pressure to the airways while you sleep. CPAP can be an effective treatment for people experiencing OSA. With a simple design, CPAP machines are also the most affordable type of PAP machine. CPAP machines generally cost between $250 and $1,000. Traditional CPAP machines are usually the least expensive type of PAP device. However, models with more features tend to be more expensive.
APAP APAP machines are more advanced than traditional CPAP devices. As you sleep, the machine can increase pressure when it senses a respiratory event. Breathing pressurized air can be uncomfortable if you’re not used to it. APAP machines adjust the pressure based on your breathing, which is often more comfortable for sleepers who have trouble exhaling with CPAP machines. APAP machines typically range from $450 to $1,800. They’re usually more expensive than traditional CPAP machines because they must detect and change pressure in response to the sleeper’s breathing.
BiPAP A BiPAP machine can sense when you inhale and exhale to administer higher-pressure air as you breathe in. BiPAP machines can usually reach higher pressures than CPAP or APAP machines. This type of PAP device may also be useful for sleepers with more complex or severe breathing issues. Because this is the most advanced type of PAP machine, it’s also the most expensive. BiPAP devices usually cost $1,000 to $6,000.
Travel CPAP Travel CPAP machines have the same therapeutic benefits as regular CPAP devices. However, they’re designed to be portable for easy travel use. This style of CPAP device allows travelers to keep up with their PAP therapy while on the road. Travel CPAP devices typically cost $450 to $1,200. The price is usually a bit higher than a traditional CPAP machine due to their extra features and compact designs.

Which Type of PAP Machine Is Best for You?

An at-home sleep apnea test or a physician can help determine whether PAP therapy is right for you and decide which type of machine best suits your needs and condition. While CPAP therapy is often the first-line treatment for obstructive sleep apnea, APAP and BiPAP are frequently useful for those who have problems with traditional CPAP machines.

CPAP Machines

CPAP machines are the simplest, most affordable, and most widely available option for sleepers experiencing OSA symptoms. If you’re on a budget or looking for the biggest selection of models and features, a traditional CPAP machine may be the best choice. Additionally, CPAP therapy is typically the first line of treatment for OSA. If you’re newly diagnosed, chances are your doctor is going to start you off with a CPAP machine and see how you respond.

APAP Machines

APAP machines are useful for those who have trouble sleeping with the constant pressure of a CPAP machine. They can also be effective for sleepers who experience regular changes in their breathing patterns, like allergy sufferers or those who change positions frequently.

BiPAP Machines

BiPAP machines provide a more specialized form of PAP therapy. A doctor usually only prescribes BiPAP treatment for people with OSA if they don’t respond to traditional CPAP therapy. BiPAP can also be effective for sleepers with other breathing-related conditions, such as central sleep apnea.

Travel CPAP Machines

A travel CPAP machine is a convenient solution for people with OSA who occasionally sleep away from home. Travel CPAP devices are small, lightweight, and easy to pack. While you may be able to take a traditional CPAP machine on your travels, their bulkier designs may be cumbersome.

Do You Need a Prescription for a CPAP Machine?

All PAP machines require a prescription from a physician. The Food and Drug Administration regulates them as Class II medical devices. Consulting with a licensed medical professional is essential to ensuring that the therapy is safe and effective. Your doctor may also order an overnight titration study to determine the best pressure setting for you.

Will Medicare or Health Insurance Pay for a CPAP Machine?

Medicare and health insurance plans usually cover part of the cost of a CPAP machine. How much your plan covers may depend on the severity of your symptoms.

Medicare may cover a three-month trial period of CPAP therapy for people diagnosed with OSA. After the trial, Medicare may continue coverage if you meet certain requirements and your doctor determines that CPAP treatment improves your symptoms. In addition to contributing to the cost of machine rental after you meet your Plan B deductible, Medicare also covers part of the cost for other CPAP supplies, like masks and tubing.

Other health insurance plans vary in their coverage and authorization requirements. Many cover a portion of the cost of a CPAP machine. Some providers consider your apnea-hypopnea index (AHI), a measure of OSA severity, when deciding the amount of coverage.

If you pay out of pocket for your CPAP equipment, you’ll need to submit a claim for reimbursement. Verify that your insurance covers out-of-pocket expenses before making a purchase. After your purchase, keep your receipt, complete the appropriate claims form, and submit the required documentation to your insurance company.

Frequently Asked Questions

How do you buy a CPAP machine?

To purchase a CPAP machine, get a prescription from your doctor and order the device through your insurance company, the manufacturer, or a medical equipment supplier.

While going through your insurance provider when buying a CPAP machine can simplify coverage, the insurance company may stipulate that you use a certain brand, which can limit your options. Also bear in mind that some insurance providers require that you rent a CPAP machine for a period of time before it is yours to keep.

Ordering directly from the CPAP manufacturer or through a third-party retailer gives you the most options. You can browse multiple brands and models with different features to make sure you find the best CPAP machine for your needs. However, buying direct generally requires paying out of pocket and submitting a reimbursement claim to your insurance company. In this scenario, you will still be subject to the terms and conditions of your insurance plan.

Do APAP and BiPAP machines require a titration study?

BiPAP machines usually require a titration study, but APAP machines may not. Overnight titration studies help your doctor determine the right level of pressure for your device by observing how much pressurized air is required to keep your airways open.

BiPAP machines use two different pressure settings, so a titration study is critical for determining what settings relieve your sleep apnea symptoms without disturbing your sleep. APAP machines can automatically adjust their pressure to the sleeper’s needs, so they may not require a titration study.

If you are still not sure how to get started, you can consider conducting an at-home sleep study and sharing your results with a healthcare professional.

Are CPAP accessories interchangeable between machine types?

Most CPAP accessories are interchangeable between different machine types and models, but it’s important to double-check compatibility.

The majority of CPAP masks are universally compatible, so they can work with almost any CPAP, APAP, or BiPAP machine. That said, there are a few exceptions. A few CPAP models only work with certain types of masks.

Standard 19-millimeter tubing is compatible with nearly all PAP masks and machine varieties. However, certain models can only be used with a slim 15-millimeter hose.

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About Our Editorial Team

Lauren Fountain

Certified Sleep Coach

Lauren is a Certified Sleep Science Coach with extensive experience researching and testing a wide variety of sleep products.


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