Questions? 1-800-356-5221

Chat with a 5-star expert now!

Questions? 1-800-356-5221

Chat with a 5-star expert now!

  1. Home /
  2. CPAP Machines /
  3. Auto Adjusting CPAP /
  4. ResMed

S8 AutoSet™ II CPAP Machine

BY ResMed  |  Item #33129
(113) Read Reviews

This item has been discontinued by the manufacturer.

Check out the newer model

Prescription Required for Purchase

Need Replacement Parts or Accessories? Shop now

Get Your Sleep Back

Face Sleeping

Setup is easy & takes minutes

Truck Fast

Orders ship within hours (M-F)

Arrows Rotate

Resupply items set to autopilot

Item # 33129

Not currently in stock

Product image for S8 AutoSet™ II CPAP Machine
Product image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #1
Product image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #2
Product image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #3
Product image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #4
Product image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #5
Overview of CPAP Power Cords and Power Supplies
Overview of CPAP DC Cables and Batteries
Click image to expand
Product Thumbnail Image #1 Product Thumbnail Image #2 Product Thumbnail Image #3 Product Thumbnail Image #4 Product Thumbnail Image #5
1/5
Product Image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #1 Product Image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #2 Product Image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #3 Product Image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #4 Product Image for S8 AutoSet™ II CPAP Machine - Thumbnail Image #5
1/5

S8 AutoSet™ II CPAP Machine

Get a tube brush for just more when you add this item to your cart.

The S8 AutoSet II is one of the top models in ResMed's S8 series. Featuring optional fully integrated humidification, remote data downloading capabilities, clinically proven AutoSet algorithm, EPR and the added comfort of Easy-Breathe technology. The AutoSet II is a compact, all-in-one system, ideal for travel or at home. Use Version 3.5 or greater ResScan Software to check therapy effectiveness, compliance data, and periodic trends.

S8 AutoSet™ II CPAP Machine

Get a tube brush for just more when you add this item to your cart.

The S8 AutoSet II is one of the top models in ResMed's S8 series. Featuring optional fully integrated humidification, remote data downloading capabilities, clinically proven AutoSet algorithm, EPR and the added comfort of Easy-Breathe technology. The AutoSet II is a compact, all-in-one system, ideal for travel or at home. Use Version 3.5 or greater ResScan Software to check therapy effectiveness, compliance data, and periodic trends.

Learn More About Your New Machine

Designed to provide the most comfortable therapy available, the ResMed S8 AutoSet II is simple, quiet and easy to use. One-touch settings and simple set-up make this machine very attractive since the AutoSet algorithm works on a breath per breath basis and automatically adjusts to find the lowest required pressure needed, preventing most snoring and apnea events. Take advantage of EPR and the new Easy-Breathe technology which offers smoother, comfortable pressure by synchronizing with the CPAP user's normal breathing patterns, allowing for natural and stable breathing. Packed with features, ResMed was able to keep sound levels well below the industry norm, operating at 24 db(A).

ResMed has incorporated its expiratory pressure reduction system into the Auto Mode on this unit. A major feature missing from the first version. EPR decreases the pressure at the beginning of each breath and keeps the pressure low throughout the exhalation. The pressure is reduced by an exact pressure drop of: one, two or three centimeters of water pressure. EPR uses slower pressure changes, so there is little ventilatory effect. However, EPR does feel very much like a Bilevel to the patient.

EPR also has an Event Detection Circuit. When a sleep disordered breathing event is expected or has occurred, EPR stops until the event concludes and normal breathing resumes.

The S8 AutoSet II uses Easy-Breathe Technology along with EPR to make breathing more natural with smooth pressure waveforms, which imitates normal respiration and ultimately makes breathing more comfortable than traditional CPAP machines.

    Key Product Features

  • EPR with Easy-Breathe Technology
  • Whisper Quiet Operation (75% quieter)
  • Simple Menu
  • Optional Heated Humidifier
  • S8 Compact Design
  • Detailed Downloads with Use of Software
  • 12V DC Input
  • AutoSet Technology
  • Smooth Pressure Delivery

Word of Caution to RESmed S8 and S8 II Machine Users

YOU MUST USE the DC-12 Converter For S8 Machines when drawing power directly from a DC battery source (no inverter and no humidifier). Failure to do so can result in damage to your CPAP. ResMed S8 machines with a Humidaire heated humidifier (h3i and H4i) require a pure AC power source in order for the humidifier to work properly. The machine disables the humidifier when connected through DC Power. The machine and humidifier will both work properly only when connected to pure A/C power. You will need the DC to AC Pure Sine Wave Power Inverter to operate both.

Sound Level: 24 dB

Machine Dimensions: 4.4 in L x 6.5 in W x 5.7 in H

Machine Weight: 3

Machine Warranty: 2 Years

Default Machine Settings: 4-20cm H20

Humidification Available: Yes

Humidification Type: Integrated

Exhalation Relief: Yes

Ramp Mode: Yes

DC Capable: Yes

Battery Option: Yes

Auto Altitude Adjustment: Yes

Auto Start: Yes

Auto Stop: Yes

Good For: [object Object]

CPAP.com always offers these services

  • 24 hour access to our CPAPtalk.com Support Forum
  • Learning Center for information on sleep apnea and cpap equipment
  • Consumer Purchasing Trends Reports
  • Warranty Services for all items purchased through CPAP.com
  • Insurance Compliant Invoices
  • Free Prescription Request System

Manufacturer Note

  • Some product images supplied by ResMed © ResMed 2010 Used with Permission.
  • All services provided by CPAP.com, including advertisement, ordering, sale, delivery, instruction, and setup of the products are performed solely by CPAP.com and independently of the manufacturer.
  • A valid prescription is required for the purchase of this product.

User Manual:

The user manual included with this machine can be viewed and downloaded here: S8 AutoSet II.

Word of Caution to RESmed S8 and S8 II Machine Users

YOU MUST USE THE DC12 Converter for S8 Machines in conjunction with any battery source, when using an S8 or S8 II machine. Failure to do so can result in damage to your CPAP.

DC to AC Pure Sine Wave Power Inverter for Resmed S8 Machines

ResMed S8 machines are required to use a pure sine wave AC power source when connecting through an inverter; particularly, the ResMed S8 Compact is not DC compatible and must plug into a wall socket. The DC to AC Pure Sine Wave Power Inverter provides clean AC power to any CPAP. You will need this product to operate the S8 Compact or any other S8 machine using the standard AC plug.



Cool Down Feature

All S8 and S8 II CPAP Machines utilize a "Cool Down" feature that runs the CPAP Motor up to 1 hour after turning the machine off. The motor helps to cool off the humidifier plate. You may hear a "faint blowing sound" when you turn the machine off. However, you can unplug the power cord and allow the heater plate to cool without airflow.

SmartStart

SmartStart enables your device to start automatically by breathing into the mask. Leak alert indicates when a high mask leak is present. If you have enabled Leak Alert, the SmartStart feature automatically becomes disabled. You cannot have both features enabled.

H4i Humidifier

The S8 AutoSet II and Elite II are compatible with the Humidaire 3i and the Humidaire 4i, but the CPAP machines were manufactured BEFORE the H4i was manufactured. When setting either machine, please note that H3i will appear on the display.

Leak Alert

Leak alert indicates when a mask is leaking as a result from a poor seal, open mouth or the complete removal of a mask. The alert is audible as well as visible on the machine's LCD display. This is one of the loudest and audible alerts on the market!

Manufacturer Warranty
This machine comes with a 2 Year Manufacturer Warranty. CPAP.com will work with the manufacturer on your behalf if the machine needs repairs. Please follow these steps:

  • Contact us at cpap@cpap.com or 1-800-356-5221 to receive an RMA (Return Merchandise Authorization) Number before returning the equipment
  • Include a note with the machine describing the issue you are experiencing, along with your full contact information to include a return shipping address and the RMA number provided to you
  • Ship only the defective items to CPAP.com at 13235 N Promenade Blvd Stafford, TX 77477
  • Do not return accessory items such as the carry bag, hose or power cords
  • Email updates will be sent to keep you informed as the machine moves through the warranty process
  • CPAP.com will contact the manufacturer on your behalf and handle all shipping between us and the manufacturer
  • The repaired or replaced unit will be returned to you. Shipping charges may apply.

Please note: The manufacturer warranty is voided by water damage or misuse of the machine.

360

Universal Power

The S8 Series CPAP machines operate automatically between 110v and 240v AC. When traveling either inside or outside the USA, there are no switches to switch or fuses to change. The machine will automatically sense what voltage is needed and set itself to run on that power.

The user will need to adapt the plug that goes into the wall to fit the style of outlet socket that is being used. This is simply done with a Power Adapter Plug kit. This is the same type of plug adapter that would be used with a hair dryer or an electric shaver. World Traveler Power Adapter Plugs.

Battery Power for S8 AutoSet II

DC12 Converter for S8 Machines

ResMed S8 Series CPAP machines come 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. This cord is ideal for travel by recreational vehicle, boat, or any external DC batter that is equipped with a cigarette lighter plug.

CPAP.com Battery Kit for S8 Machines

The 2.5 lb CPAP.com Battery Pack is surprisingly small and lightweight. The lithium ion battery can be recharged at any discharge level without losing charge time due to battery memory loss. This battery has been approved by the United Nations and Department of Transportation as tested safe for travel. This battery kit comes with the CPAP.com battery and the DC12 Converter for S8 Machines, the cable needed to power most ResMed S8 CPAP machines.

Respironics Battery Kit for S8 Machines.

This portable battery pack is an external lead acid battery that is the ultimate in power, portability and convenience. This battery kit comes with the Respironics battery and the DC12 Converter for S8 Machines, the cable needed to power most ResMed S8 CPAP machines.

What does CPAP therapy do?
CPAP therapy provides a constant airflow which holds the airway open so that uninterrupted breathing is maintained during sleep. It is traditionally provided through a nasal mask that seals around the nose to maintain the pressure level.
Which CPAP masks work on which machines?

Any mask will work with any machine, with one important exception. The ResMed AirMini is only compatible with certain ResMed CPAP masks. Compatible masks for the AirMini are as follows:

  • ResMed AirFit™ N20 Nasal Mask
  • ResMed AirFit™ F20 Full Face
  • ResMed AirTouch™ F20 Full Face
  • ResMed AirFit™ P10 Nasal Pillow

When considering another CPAP, APAP or BiPAP machine from ResMed or any other manufacturer, mask compatibility extends to all brands. The AirMini uses non-standard tubing to connect the machine to the mask, and is the primary reason why other masks won't work with the AirMini. Despite this issue, many of our customers consider the AirMini to be an excellent machine.

How do I choose the machine that is right for me?
We provide our customers with many tools to make informed decisions about their machine purchases. Options include:
How can I compare different machines?
We work very hard to provide many different ways for our customers to compare products. Here are the machine product guides we have created and maintain:
  • CPAP Machine Comparison Guide. This guide stacks up every CPAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular CPAPs, or all CPAP machines we sell.

    Compare Most Popular CPAP Machines

    Compare All CPAP Machines

  • Auto Adjusting Machine (APAP) Comparison Guide. This guide stacks up every APAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular APAPs, or all APAP machines we sell.

    Compare Most Popular APAP Machines

    Compare All APAP Machines

  • BiPAP, VPAP and BiLevel Comparison Guide. This guide stacks up every BiPAP machine we sell, feature by feature. If you don't know the meaning of a feature, click the question mark for a definition. The links below will take you to the most popular BiPAPs, or all BiPAP machines we sell.

    Compare Most Popular BiPAP Machines

    Compare All BiPAP Machines
What comes with my machine?
Machines come with a six foot hose, power cord, at least one filter, and manuals. Most manufacturers include a carrying case which is designed specifically for their equipment. CPAP, APAP, and BiPAP machines do not come with a delivery system or mask. CPAP masks must be purchased separately.

To see the list of what specifically comes with each machine, you can Browse for a machine. Then on the product page, click the "Specs" tab to see a full list of what comes with the machine.

Do all CPAPs use filters?
Yes, all CPAPs use at least one filter that is usually a type of foam material and washable. Some CPAPs offer finer filtration with the addition of a disposable paper filter.

Cleaning and changing filters is the only maintenance required for a CPAP machine.

The filters are located at the back of the machine at the air intake.
Why might I prefer an APAP machine?
Some CPAP users find it more pleasant to breathe with an APAP than with CPAP. The pressure delivered by an APAP machine automatically changes as needed to deliver the minimal pressure required to maintain the airway. The pressure delivered by a CPAP machine is set to a single pressure, the highest necessary to keep the airway open as determined during the sleep study. This is the case even when the higher pressure is needed only a fraction of the time.
What does an APAP prescription need to say?
An APAP prescription must contain all of the following information:
  • One of the following words or phrases: "APAP", "AutoPAP", "AutoSet", "Auto CPAP", "Auto Adjusting CPAP", "Self Adjusting CPAP", "CPAP" or "Continuous Positive Airway Pressure" or similar term.
  • Your physician's contact information
  • Your physician's signature
  • The patient's full name

An APAP prescription may contain the following information:

  • Your pressure range (Optional, Not Required)
    • Example: 4-20 CM/H20
    • Example: 4-20
    • Example: 6-18 CM/H2O
    • Example: 6-18

CPAP prescriptions are accepted for Auto Adjusting (APAP) machines.

Here are some of our top selling APAP machines:

Transcend Auto miniCPAP™ Machine with EZEX
PR System One REMStar 60 Series Auto with Bluetooth
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
+ See More
What is exhalation relief?
Exhalation relief is a comfort feature which reduces the air flow at the time of exhalation, making the breathing process more natural.

The following are the different types of exhalation relief names by manufacturer.

  • Philips Respironics = C-Flex, C-Flex+, A-Flex and Bi-Flex
  • Resmed = EPR (Expiratory Pressure Relief)
  • 3B Medical = RESlex
  • Apex Medical = PVA (Pressure Variation Algorithm) Pressure Relief
  • Curative Medical = EUT (Expiratory Unloading Technology)
  • DeVilbiss = SmartFlex
  • Fisher & Paykel = SensAwake Technology
  • Human Design Medical = Z-Breathe
  • Somnetics = EZEX

Here are some machines with an exhalation relief feature:

Transcend Auto miniCPAP™ Machine with EZEX
PR System One REMStar 60 Series Auto with Bluetooth
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
+ See More
What maintenance is required on machines?
The only care a CPAP, APAP or BiPAP machine requires is to clean or change the filters at the air intake. This keeps the internal parts from accumulating dust. Fine paper filters should be changed out every 30 days, or when they appear soiled. Foam washable filters should be rinsed with clear running water once a week, allowed to air dry, and reinserted.

Here are some other suggested actions to care for your machine:
  • Keep the area around your machine clean by removing any dust from the area to improve the air quality delivered to your machine and to you.
  • Keep the air intake of the machine unblocked. Curtains, bedding, and papers can easily block the air intake of your machine, reducing the airflow.
  • If a humidifier is used with your therapy, do not pick up the machine with the humidifier attached. With most machines it is easy to spill water from the humidifier chamber into the machine causing damage. Manufacturer warranties are voided by water damage to the machine. To avoid this, remove the chamber from the humidifier and then remove the humidifier from the machine rather than transporting them together.
  • If a humidifier is used, empty the water from the chamber every morning. Accidents happen. If a family pet or family member moves the machine and humidifier with water in the chamber it is more likely that water could be spilled into your machine. Water damage to a machine voids the manufacturer warranty.

CPAP.com 100% Price Protection Guarantee

When you shop with us, we want you to be confident that you are receiving the best available price. If this items goes on sale or you spot an online or retail competitor with a lower price within seven days of your purchase, let us know, and we will credit you the difference.

"Super helpful, fast shipping, friendly assistance, great selection, I love this company."

- Verified Customer, 10/25/22

★★★★★

(113)  

Read Reviews

Compare Similar Products

Manufacturer
ResMed
ResMed
ResMed
Warranty
2 Years
2 Years
2 Years
Sound Level
24 dB
27 dBA
26.6 dBA
Quiet
-
Yes
Yes

Need a personal touch?

Icon for Chat with CPAP

Chat with CPAP

Questions about a product or an existing order? Start a chat and let us help you out.

Start a chat

Icon for Call us

Call us

M-F 8am-8pm
Sat 8am-5pm (CST)

1.800.356.5221

Customer Reviews

See what other customers are saying.

Overall Rating
★★★★★
5.0 113 Reviews
5  Stars 
108
4  Stars 
4
3  Stars 
0
2  Stars 
1
1  Stars 
0
Sort By
★★★★★

Great machine

Verified purchase | May. 27, 2018 | Verified CPAP.com Customer
Lots of great sleeps for years until the humidity chamber gave out recently and had to but a new machine. New machine rocks. Resmed 10
Was this helpful?
(0)
(0)
★★★★★

Verified purchase | May. 31, 2012 | Verified CPAP.com Customer
Good equipment, very quiet.
Was this helpful?
(0)
(0)
★★★★★

excellent machine

Verified purchase | May. 23, 2012 | Verified CPAP.com Customer
Excellent machine. Better than the S9 because it does not require the large and weighty power transformer which the S9 does.
Was this helpful?
(0)
(0)
★★★★★

S8 AutoSet™ II CPAP Machine

Verified purchase | May. 19, 2012 | Verified CPAP.com Customer
The best thing I have ever purchased for myself. It is excellent.
Was this helpful?
(0)
(0)
★★★★★

Verified purchase | May. 17, 2012 | Verified CPAP.com Customer
Product is compact and operates quietly. Power cord is separate which is an advantage over internally connected power cords that tend to fray at the machine entry point. After discussing options with your staff, this was an excellent choice and fits my needs perfectly.
Was this helpful?
(0)
(0)
★★★★★

Verified purchase | May. 09, 2012 | Verified CPAP.com Customer
I don't like the fact I have to unplug machine to turn it off completely. Does not have a switch in the back like my Resmed Autoset Spirit. Also do not like the small flimsy cord that plugs in the back of machine.
Was this helpful?
(0)
(0)

Customers Also Viewed

Product image for HumidAire H4i™ Heated Humidifier
★★★★★
$232.00

HumidAire H4i™ Heated Humidifier

Product image for AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
★★★★★
$1776.00

AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier

Product image for ResMed AirCurve 10 ASV Machine with Heated Humidifier
★★★★★
$2890.00

ResMed AirCurve 10 ASV Machine with Heated Humidifier

Product image for ResMed AirSense™ 10 AutoSet™ CPAP Machine With HumidAir (Card-to-Cloud Version)
★★★★★
$499.00 $1199.99

ResMed AirSense™ 10 AutoSet™ CPAP Machine With HumidAir (Card-to-Cloud Version)

Product image for ResMed AirSense™ 11 AutoSet™ CPAP Machine
★★★★★
$1004.00 $2253.00

ResMed AirSense™ 11 AutoSet™ CPAP Machine

Product image for ResMed Power Station II Battery Kit for AirStart™ 10, AirSense™ 10, and AirCurve™ 10 CPAP Machines
★★★★★
$719.65

ResMed Power Station II Battery Kit for AirStart™ 10, AirSense™ 10, and AirCurve™ 10 CPAP Machines