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ResMed S8 AutoSet™ II CPAP Machine

SKU# 33129

For more information on ResMed S8 AutoSet™ II CPAP Machine see the description below.

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Whisper-quiet motor

Setting a new industry standard in quiet therapy and comfort, ResMed’s new sophisticated motor design delivers superior performance at a lower effort while cutting device noise significantly. By reducing noise, Easy-Breathe technology enables patients and their bed partners to sleep peacefully through the night. It also has a H4i™ Heated Humidifier.


  • Now available with the new H4i Heated Humidifier: Now with 30% more humidity, ResMed's latest technology ensures the H4i heated humidifier delivers the most humidity output of an integrated device. The H4i clicks easily into place and supports ResMed's full S8 platform---from entry-level CPAP to premium VPAP bilevels.
  • Easy-Breathe technology: Easy-Breathe technology combines new software, a quieter motor and improved EPR for maximum comfort and a quiet night’s sleep. With Easy-Breathe technology, EPR is integrated with AutoSet™ technology for pressure relief that continually adjusts to patients’ pressure needs, breath by breath.
  • Pressure relief for more natural breathing: Featuring ResMed’s improved EPR with Easy-Breathe technology, the S8 AutoSet II offers pressure relief delivered in a smooth waveform that mimics patient breathing. With a choice of three different EPR comfort levels, the S8 AutoSet II with Easy-Breathe technology allows customized comfort for breathing that feels natural.
  • Available Fully integrated humidification: Designed to provide heated humidification and form a seamlessly integrated unit when attached to the ResMed S8™ series. ResMed's H4i Heated Humidifier is designed to offer maximum relief from the symptoms of dryness and congestion associated with CPAP therapy without compromising therapy effectiveness or ease of use. Powered by ResMed’s S8 devices—no additional power cords or cables required.
  • DC Power (Cigarette Lighter Adapter): The Resmed S8 AutoSet II is equipped with a DC plug on the back of the unit. This allows the user to connect the CPAP to an external DC battery source. The ResMed DC-12 converter with the S8 AutoSet II CPAP can be powered by plugging into a cigarette lighter plug. This is ideal for traveling by car, boat, or recreational vehicle that is equipped with a cigarette lighter plug (see recomended items)


  • New whisper-quiet motor is 75% quieter than before
  • New Easy-Breathe technology
  • New & improved EPR with Easy-Breathe technology for enhanced patient breathing comfort
  • Usage-based compliance download for accurate patient monitoring
  • Data card –Standard feature included for easy two-way data transfer


This Package Incluldes:  S8 AutoSet II CPAP, Sleek Travel Bag, Filters (1 year supply), 6 Foot CPAP Tube, User Manual, Power Cord, 2 Year Manufacturer's Warranty, optional heated humidifier.

*Prescription is required with purchase. Please fax to 856-767-7151 or email to contact@thecpapshop.com. Please call to confirm.

©ResMed 2010 Used with Permission to all WebPages with ResMed pictures



RESMED Minimum Internet Retail Price & POLICIES FOR THIS PRODUCT - We are only authorized to sell and ship Resmed products to end-users residing in the United States. A prescription is required for the purchase of certain products on this site including masks, humidifiers, and machines. All services are provided solely by The CPAP Shop and independently of the manufacturer. These services include the advertisement, ordering, sale, delivery, instruction, and setup of the products.

Pressure Range: 4 to 20 cm H2O
Ramp Time : 0 to 20 min. (5-min. increments)
Starting Ramp Pressure: 4 to CPAP; patient-adjustable
Dimensions: 4.4” x 6.5” X 5.7” (112mm x 164mm x 145mm)
Weight: 3 lbs
Filters: Pollen
Device Set-up: LCD/keypad
Data Storage Capacity: Display: 365 days summary data and 5 nights detailed data (up to 500 events per session
Data Card: 180 days of summary data and 5 nights detailed data (up to 200 events per session)
Pressure Relief on Exhale: EPR and Easy-Breathe
Altitude Compensation: Automatic
Electrical Requirements: 100 – 240 V, 50/60 Hz; 110 V, 400 Hz; 2.5A <140 VA (110W)(maximum power consumption). Instantaneous peak power consumption <340VA
Humidification: Optional Integrated Heated Humidifier and Pass-over Humidifier
Warranty: 2 years
DC Power: Only use DC-12 Converter by ResMed for DC input or damage may occur

This machine comes with a 2 Year Manufacturer Warranty.  

 The CPAP Shop provides a hassle-free, no hidden catches or exceptions policy:  If there is a problem with your CPAP or BiPAP machine within the warranty period, contact us by phone, email, or chat. If the problem cannot be fixed, we will provide you with a pre-paid return label, returning the machine back to us.  On your behalf, we will then work directly with the manufacturer.   If the issue cannot be corrected, we will provide a new CPAP(similar make and model) with a new 2 year warranty including the set up and shipping, free of charge.  

The manufacturer warranty is voided by water damage, negligence or damages caused outside of the standard 2 year manufacturer warranty

  • Phone #866-414-9700
  • Fax# 856-767-7151
  • Email:  contact@thecpapshop.com

Customer Reviews

9 Item(s)

per page
"Works Great" - Review by Daggett
Works Great

I've had this for over three years with no issues. Yeah, you need to clean it weekly and replace hoses, filter, and mask perhaps yearly, but it works great. I've no design-related issues that others mention.

(Posted on 6/29/2014)

"S8 Auto plus humidifier" - Review by Matt
S8 Auto plus humidifier

I have been using this machine for near 6 months. It certainly is quiet, but has a high pitched whine in the background that may disturb some difficult-to-fall-asleep people.
I am in the medical field having had experience in high care environments -- thus I do not ever use the humidifier. I prefer to breathe the air with its normal qualities (that I would have been breathing anyway had I not used a CPAP) than some air going through a heated or not heated humidifier. Most of the bad lung infections in the high care were traced back to germ colonies that have established in the humidifiers -- an ideal medium. If you do HAVE to use a humidifier, clean, wash, and disinfect EVERY day. They also tend to accumulate some scale on the bottom, depending on the hardness of the water used, that needs to be removed regularly.
I also unplug my S8 Auto every morning -- I found that if I don't, the air supply for the first couple of minutes appear warm, and is irritating to me as it is a sudden change from what I have been breathing.
The machine is extremely well made (so are probably all of them) but maybe a little on the expensive side if compared to some other equivalent CPAP machines.
Also, you can set the pressure, etc. yourself -- to make it comfortable for your circumstances.
I do intend to use mine for a number of years . . .

(Posted on 4/9/2013)

"S8" - Review by Chip

Best machine Resmed has made. I have tried both the s8 and s9. I think the s8 is better hands down.

(Posted on 6/18/2012)

"Water Container Breaks in 6 weeks" - Review by AustinRuth
Water Container Breaks in 6 weeks

The humidifier unit is excellent,but the water container breaks in exactly 6 weeks, no matter how gently I treat it. The retaining ring on the bottom cracks. I have been forced to resort to glue to seal the tub together, as my insurance only pays for a new one every 6 months. This is a serious design flaw.

(Posted on 4/6/2012)

"S8 autoset" - Review by Jack L.
S8 autoset

I really like this machine a lot. Its small and lightweight and doesn't break. Although my friends prefer the new S9 Auto.with the heated tube, I still prefer my great S8 Auto. Just wish it was less expensive so I can buy another.

(Posted on 3/9/2012)

"ResMed S8 AutoSet ll with Heated Humidifier" - Review by Philip
ResMed S8 AutoSet ll with Heated Humidifier

I purchased this machine just over a year ago, the question and answers helped when I purchased it, they were very helpful. It it is great for when you need to travel as it is small and light weight and I also have a boat, so it fits nice in there. It is very quiet and compact, the service from this supplier has been extraordinary. I had a problem with it and they went over and above to fix my problem. a big thank you. I would refer them to anyone.


(Posted on 2/15/2012)

"S8 autoset" - Review by Ellen
S8 autoset

This machine is perfect for travel! Quiet, easy to operate, and works overseas. I took this unit on my long flight to Australia and used it on the plane. Hooked up my Resmed cpap to the DC converter, then to my cpap battery. Although I had no problems with the airline, I would suggest calling your airline first to make sure.

(Posted on 9/5/2011)

"S8 autoset II" - Review by Gerard
S8 autoset II

This little machine is great for travelers. The cpap and heated humidifier come apart with ease. The unit itself is incredibly quiet, with my average pressure at 10cmH2o. My wife and I can both get a good nights sleep again.

(Posted on 9/5/2011)

"S8 plus Humidifier" - Review by Leonard
S8 plus Humidifier

After a year I was so pleased that I purchased a second one which I use for travel. Great system,, great reporting and diagnostic capabilities.I shopped around and was hoping to find a better machine but this is the ultimate. I am considering the new slim model just released ResMed S9 Escape with EPR and H5i Heated Humidifier but not sure it is sufficiently different. Thank you Chris for professional advise, great service and prompt delivery.

(Posted on 9/5/2011)

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