Comparing APAP vs CPAP: Which Is the Right Choice for You? - The Sleep Institute

Comparing APAP vs CPAP: Which Is the Right Choice for You?

Cartoon image of cpap and apap sleep apnea machines

If you're struggling with sleep apnea, choosing between APAP vs CPAP can be overwhelming.

Comparing APAP vs CPAP: Which Is the Right Choice for You?

If you suffer from sleep apnea, chances are you've heard about two popular treatment options: CPAP and APAP. But what are they, and how do they work? In this article, we'll explore the differences between APAP and CPAP machines, the benefits and potential drawbacks of each, and help you make an informed decision about which one is the right choice for you.

Understanding APAP and CPAP

CPAP (Continuous Positive Airway Pressure) and APAP (Automatic Positive Airway Pressure) machines are both designed to treat sleep apnea by providing a steady stream of pressurized air. However, their mechanisms and modes of operation differ. 

What is CPAP?

CPAP machines are the more traditional option, delivering a continuous stream of air at a set pressure level. This can be uncomfortable for some users, especially those who breathe out against the incoming air (known as exhalation resistance). 

What is APAP?

APAP machines, on the other hand, are equipped with algorithms that adjust the pressure level automatically based on your breathing patterns throughout the night. This allows for a more personalized, comfortable experience, which makes them a popular choice for those who find CPAP more difficult to tolerate.

Man sleeping on bed with cpap sleep apnea machine

How CPAP and APAP Machines Work

Both CPAP and APAP machines are used to treat sleep apnea, a condition where a person’s breathing is interrupted during sleep. Learn more about it HERE. These machines operate by delivering pressurized air through a mask worn over the nose and/or mouth. This helps keep the airway open and prevent apnea episodes from occurring. 

The Mechanism of CPAP Machines

CPAP machines force air into the airway at a constant pressure level, regardless of changes in breathing patterns or sleep position. This constant pressure helps to keep the airway open and prevent apnea episodes. CPAP machines include a motor, a humidifier, and tubing that connect the mask to the machine. The humidifier adds moisture to the air, which can help prevent dry mouth and nasal passages. CPAP machines are often prescribed for people with severe sleep apnea.

It is important to note that CPAP machines can take some getting used to. The constant pressure of the air can be uncomfortable at first, and it may take some time to find the right mask and pressure settings. However, with patience and persistence, most people are able to adjust to using a CPAP machine and experience significant improvements in their sleep quality and overall health. 

Happy Customer Review For The Sleep Institute

The Mechanism of APAP Machines

APAP machines, on the other hand, adjust the pressure level automatically based on feedback from sensors inside the machine that monitor your breathing patterns. These devices tend to be more complex than CPAP machines. They include a microprocessor, an algorithm, and sensors that track your breathing. APAP machines are often prescribed for people with mild to moderate sleep apnea.

One of the advantages of APAP machines is that they can adjust to changes in your sleep position and breathing patterns throughout the night. This can help to ensure that you are receiving the optimal level of pressure to keep your airway open and prevent apnea episodes. Additionally, APAP machines can be more comfortable to use than CPAP machines, as the pressure is not constant.

It is important to note that both CPAP and APAP machines require a prescription from a doctor, and that they should only be used under the guidance of a healthcare professional. Additionally, it is important to keep your machine clean and well-maintained to ensure that it is functioning properly and providing you with the best possible treatment for your sleep apnea.

Woman giving thumbs up while wearing cpap sleep apnea machine

Benefits of CPAP Therapy

Despite the discomfort some users may experience, CPAP machines remain the gold standard in sleep apnea treatment for a reason. Here are some of the benefits of using CPAP therapy:

Improved Sleep Quality

With CPAP therapy, you'll be breathing normally throughout the night, which promotes a deeper level of sleep and helps you feel more rested in the morning.

Furthermore, improved sleep quality can have a positive impact on your overall health and well-being. Studies have shown that getting enough high-quality sleep can boost your immune system, improve your mood, and even help you maintain a healthy weight.

Reduced Sleep Apnea Symptoms

By keeping your airway open, CPAP therapy can minimize or eliminate the symptoms of sleep apnea, including snoring, gasping for air, and interrupted sleep.

Not only can these symptoms be disruptive to your own sleep, but they can also impact the sleep of your partner or other household members. By effectively treating sleep apnea with CPAP therapy, you can improve the quality of life for everyone in your home.

Long-term Health Benefits

Sleep apnea is associated with a host of long-term health problems, including heart disease, stroke, and diabetes. By effectively treating sleep apnea with CPAP therapy, you may be able to mitigate or prevent these negative outcomes.

In addition to reducing your risk of serious health problems, CPAP therapy can also help you feel more alert and focused during the day. This can improve your productivity at work or school, and make it easier to enjoy your favorite activities and hobbies.

Man sleeping in bed while wearing sleep apnea mask and cpap

Benefits of APAP Therapy

While CPAP therapy is effective, it's not for everyone. Patients who struggle to tolerate CPAP may benefit from switching to an APAP machine. Here are some of the benefits of APAP therapy:

Personalized Pressure Adjustments

By automatically adjusting the pressure level based on your breathing patterns, APAP machines provide a more tailored experience than CPAP. This can increase comfort and reduce the likelihood of side effects.

Moreover, the personalized pressure adjustments offered by APAP machines can be particularly beneficial for individuals with complex sleep apnea syndrome, a condition that involves both obstructive and central sleep apnea. The ability of APAP machines to detect and respond to the varying breathing patterns associated with this condition can improve treatment outcomes and enhance overall sleep quality.

Greater Comfort and Ease of Use

The ability to customize pressure levels also means that APAP machines tend to be more comfortable for users. Additionally, APAP machines are often smaller and quieter than traditional CPAP machines, making them a more attractive option for bedroom use.

Furthermore, APAP machines typically come with a range of features designed to enhance user comfort. For example, many APAP machines now have heated humidifiers that can help prevent dry mouth and throat irritation, while also promoting more restful sleep. Other features, such as ramp-up settings that gradually increase pressure levels over time, can also help users adjust to therapy more easily.

Enhanced Treatment Efficacy

With an APAP machine, you can be confident that you're receiving the optimal level of pressure to treat your sleep apnea. This can lead to greater efficacy compared to CPAP therapy, especially among users who struggle with keeping a consistent pressure level.

Moreover, the ability of APAP machines to automatically adjust pressure levels in response to changes in breathing patterns can help ensure that users receive effective treatment even as their sleep apnea symptoms evolve over time. This can be particularly important for individuals with progressive conditions or those undergoing significant lifestyle changes that may impact their sleep.

Woman trying to figure out cpap machine and sleep apnea mask

Potential Drawbacks of CPAP and APAP

No medical treatment is perfect, and both CPAP and APAP therapy come with their own set of potential drawbacks. Here are some of the issues to consider:

Common Side Effects of CPAP

For some users, CPAP therapy can cause side effects such as dry mouth, nasal congestion, and irritated skin from the mask. Additionally, the constant pressure can be difficult to tolerate, especially for new users.

However, it's important to note that these side effects are usually temporary and can often be managed with adjustments to the mask or machine settings. For example, using a humidifier with the CPAP machine can help alleviate dry mouth and nasal congestion.

It's also worth noting that the benefits of CPAP therapy, such as improved sleep quality and reduced risk of serious health conditions like heart disease and stroke, often outweigh the temporary discomfort of side effects.

Common Side Effects of APAP

While APAP machines tend to be more comfortable and customizable than CPAP machines, they too can cause side effects. These include discomfort from the mask, air pressure changes that may wake you up, and even machine malfunction.

However, like with CPAP therapy, these side effects can often be managed with adjustments to the machine settings or mask. For example, using a mask with a different size or style may alleviate discomfort, while adjusting the pressure settings can prevent air pressure changes from waking you up.

It's also important to note that APAP machines can provide more accurate and effective treatment than CPAP machines, as they can automatically adjust the air pressure based on your breathing patterns throughout the night.

Cost and Insurance Considerations

CPAP and APAP machines aren't cheap - depending on the model and features, you can expect to pay anywhere from a few hundred to a few thousand dollars. Additionally, insurance coverage can vary, so be sure to check your policy before making a purchase.

However, it's important to consider the long-term cost savings that can come with effective treatment. By improving your sleep quality and reducing your risk of serious health conditions, you may be able to save money on medical bills and improve your overall quality of life.

Many insurance policies do cover the cost of CPAP and APAP machines, as well as replacement parts and supplies like masks and filters. Some policies may even cover the cost of a sleep study to diagnose sleep apnea.

Be sure to talk to your healthcare provider and insurance company to fully understand your coverage options and any out-of-pocket costs you may incur.


Choosing between CPAP and APAP therapy is a personal decision that depends on your individual needs and preferences. While CPAP remains the gold standard in sleep apnea treatment, APAP machines have gained popularity in recent years due to their enhanced comfort and customization. Ultimately, the right choice for you will depend on factors such as your sleeping habits, budget, and tolerance for wearing a mask. Consult with your doctor or sleep specialist to determine which machine will best meet your needs, and rest easy knowing that you're taking an important step towards better health and quality of life.



I live in California and my CPAP machine arrived within a week’s time so USA buyers no worries. I am very happy with The Sleep Institute and my new machine. No complaints whatsoever

- Cyrus

Back to blog