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The Answer to a Good Night?s Sleep: ResMed S9 Autoset CPAP Machine Review

Do you randomly wake up at night, gasping for breath? Experience chronic tiredness throughout the day? Are you prone to morning headaches and restless sleep?

All these are symptoms of obstructive sleep apnea–a condition wherein your throat muscles block your airway when you sleep, causing you to breathe intermittently.

It’s not easy living with sleep apnea. It can even contribute to the development of health problems, like hypertension, heart problems, and diabetes.

Fortunately, you can keep it at bay with Continuous Positive Airway Pressure (CPAP) therapy. It blows pressurized air into your airway, keeping your throat from collapsing and helping you breathe and sleep better every night. It even helps with snoring problems so you don’t have to worry about disrupting your partner’s sleep ever again!

But CPAP treatments are not as simple as popping a pill. You have to find the right CPAP machine to help you sleep well at night.

And one of those CPAP machines that garnered lots of rave reviews online is the ResMed S9 AutoSet CPAP Machine.

Let us look take a closer look at this crowd favorite in this review:

There is a good reason why the ResMed S9 is one of the most popular CPAP machines in the market. It is quiet, easy to use, and is highly recommended by doctors and patients alike.
The S9 AutoSet is the premium auto-adjusting device in ResMed’s S9 series. It features the Easy-Breathe technology, which allows you to breathe naturally while wearing your CPAP mask.

Backed by ResMed, one of the most trusted names in the industry, this CPAP machine also features a variety of accessories and attachments that can all help you breathe easier while you sleep.

Quick Summary

Dimensions: 5.5” x 5.5” X 3.4” (153mm x 140mm x 86mm) without humidifier; 11.0” x 5.5” X 3.4” (306mm x 140mm x 86mm) with humidifier
Weight: 1.8lb/0.81kg without a humidifier; 3.3lb/1.5kg with a humidifier
Pressure Range: 4 to 20 cm H20
Ramp Time: 0-20 minutes with 5-minute increments
Data Recording: Records and displays sleep data summary for 365 days; detailed data for 30 days

Key Features

The device offers a fully colored screen with user-friendly controls. It’s also easy to set up, as long as you follow the instructions in the manual.

Both the CPAP machine and its heated humidifier attachment are easily removable for cleaning and traveling.

he ResMed S9 AutoSet CPAP Machine has a Mask-Fit System that allows you to test the fit of the mask first. Because of this, it’s easy to check for leaks.

The H5i Heated cpap Humidifier uses intelligent humidity controlling technology to offer optimum relief from dryness and congestion.

But take note that this attachment is optional and can be purchased as an add-on to your CPAP machine.

The narrow SlimLine tubing helps eliminate drag on your mask, thus improving overall mask fit and sleep comfort.

The ResMed S9 AutoSet automatically adjusts the pressure to make sure that it only provides the exact amount of pressure required from breath to breath.

Thanks to this technology, you can naturally and effortlessly breathe through the mask as if you’re not using a CPAP or VPAP machine at all.

ResMed’s Smart-Start and Smart-Stop technologies allow you to start your machine automatically by breathing into the mask. Your CPAP treatment will also stop once the mask is removed.

No need for controls or switches that you might easily forget.

The ResMed S9 AutoSet provides a snapshot of your sleep therapy directly on the device. Some of the data recorded include average usage, hours used, days used, run hours, and pressure.

Pros and Cons


  • Intuitive design and user-friendly controls
  • Well-rated by both specialists and patients
  • Comfortable to use
  • With optional humidifier attachment
  • With optional heated tubing
  • Noiseless
  • AutoSet technology adjusts breath by breath, even as needs change
  • Clinically proven to increase comfort and compliance


  • Relatively expensive if paying straight out of the pocket

Actual Feedback from Users

“Air Sense 10 went berserk. Fortunately, I found that a new water tank solved that problem. However, in the meantime, this one saved my ability to get a good night’s sleep even after resting in a sort of retirement for some time while I figured out the need for replacing the humidifier and resolved the problem of getting it. Now I have both making my life more secure having this and the other to back each other up in case of problems. Lucky me!” – VERIFIED CPAP.COM CUSTOMER, TX – SEPTEMBER 21, 2018

“Just perfect for sleeping very well. The automatic function is very good, turns on with breathing and turns off when you remove the hose.” – VERIFIED CPAP.COM CUSTOMER, TX – APRIL 6, 2016

“I bought this to upgrade from the S8. It is much more silent, and the humidifier can be opened up and cleaned, unlike the older S8. Also, the EPR function is fantastic. I no longer have to use so much effort to exhale. Very pleased with my purchase.” – VERIFIED CPAP.COM CUSTOMER, TX – DECEMBER 13, 2016

“Since I usually travel for both quick business trips and vacation, I had to take the S9 with me and I am very pleased about how it travels well. I have been using the included carry case which makes it more convenient.” – VERIFIED CPAP.COM CUSTOMER, TX – MAY 3, 2017

“Honestly, this machine has exceeded my expectations on virtually every factor I can think of. Sure, cheaper would have been nicer, but I suspect I will be using this device over so much time that I think the extra cost is ultimately well spent.” – VERIFIED CPAP.COM CUSTOMER, TX – OCTOBER 21, 2016

“The configurable graphs and charts, especially the detailed second-by-second monitoring through the ReScan software were very empowering for me, and greatly reduces my need to talk to any doctor since I can see, in detail, how I am doing.” – VERIFIED CPAP.COM CUSTOMER, TX – MARCH 13, 2018

Conclusion and Recommendation

Recommended for:

  • People with sleep apnea
  • People who want a fully-automated CPAP machine
  • People who want to record and analyze their sleep data

Not Recommended for:

  • People looking for cheaper options

If you’re looking for a lightweight, quiet, comfortable, and easily adjustable CPAP machine, then the ResMed S9 is a superb option. With this machine, you can peacefully sleep your worries away.

It may be more expensive compared to other units, but its quality and tremendous value make up for it. If you’re willing to spend more for a device that proves to be more cost-efficient in the long run, then there should be no thinking twice about getting the ResMed S9 AutoSet CPAP Machine.

Meet The Author


“Written by a group of passionate advocates for health tech news and life science, this blog stems from personal experience and deep-rooted interest. Join us as we explore the intricacies of sleep, driven by knowledge and a mission to improve sleep wellness.”

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