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Philips Respironics

M Series Pro C-Flex CPAP Machine

Name: M Series Pro C-Flex CPAP Machine
Brand: Philips Respironics
SKU: DS400S
Price: 375.00 USD
Availability: Discontinued
Rating: 4.5 (52 reviews)

BY Philips Respironics | Item #DS400S

(52) Read Reviews

This item has been discontinued by the manufacturer.

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

1051 Reviews

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Prescription Required for Purchase

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Item # DS400S

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M Series Machine - Filter View (Shown With Filter Installed)

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M Series Pro CPAP Machine

The M Series Pro is a small and feature packed CPAP that looks more like a stylish clock radio than a CPAP.

It easily packs away in your carry on luggage, and has an incredible number of high-tech features, including the patented C-Flex comfort feature, and powerful clinical data features, on board.

This model is no longer available. For a suitable alternative, we recommend the DreamStation 2 Machine. The DreamStation CPAP is a quiet, sleek, and modern CPAP device. The DreamStation family of machines are only 25.8 decibels and are considered among the quietest on the market.

Looking for an auto-adjusting machine? Consider the DreamStation 2 Auto with Heated Humidifier, which combines automatic pressure adjustments with the comfort of humidification all for one low price.

M Series Pro CPAP Machine

The M Series Pro is a small and feature packed CPAP that looks more like a stylish clock radio than a CPAP.

It easily packs away in your carry on luggage, and has an incredible number of high-tech features, including the patented C-Flex comfort feature, and powerful clinical data features, on board.

Learn More About Your New Machine

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:

Calling a CPAP Expert Toll Free. 800.356.5221.
Comparison Charts. These charts compare available machines, feature by feature. If you don't know the meaning of a feature, click on the question mark for a definition. Click on the image or name of the product for more detailed product information, pictures and resources.

Travel CPAP Comparison Chart

APAP Comparison Chart

BiPAP Comparison Chart
Browse Our Machine Product Categories. These categories show each machine our company offers, ranked by popularity. Popularity is determined by a mix of sales data and our in house opinion of the quality of the machine based on our experience and customer feedback. The best products float to the top of our categories.

CPAP Machine Category

APAP (Auto Adjusting) Machine Category

BiPAP (Two Pressure) Machine Category

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.

Are prescriptions required for mask, machine, humidifier, and EPAP purchases?

Yes. Federal law requires we have a valid prescription on file before we ship your mask, machine, humidifier, or EPAP therapy, including Provent and Bongo RX. You will also need a prescription to purchase the Nightbalance POSA device.

We provide many easy ways to get your prescription:

We can request your prescription for you! When you checkout, just let us know you would like us to request your prescription, or you can log into your account to have us request your prescription.
Fax your prescription to our toll-free fax number: 866.353.2727, or our international fax number: 713.541.7377
Email your prescription to cpap@cpap.com
Upload your prescription in your account, under the Prescriptions Section
Ask your doctor to fill out our prescription form. We have both a standard prescription form and an EPAP prescription form.

For more information on prescriptions, please see our Prescription Section of the Learning Center.

What is ramp?

The ramp button on a machine is a feature that allows for a gradual pressure build-up to your prescribed pressure. The feature is enjoyed by those with high pressures because it eases up to their pressure.

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 is C-Flex?

C-Flex is a pressure relief feature that makes breathing back against CPAP pressure easier to do by reducing the pressure at the beginning of exhalation and returning to therapeutic pressure just before inhalation. Independent studies conducted by leading universities indicate that patient comfort, and therefore, patient CPAP compliance, is higher with machines that use C-Flex. C-Flex is a technology invented by Respironics, is proprietary, and is not available on other brands of CPAP machines.

An example of a machine with C-Flex technology is the DreamStation CPAP Machine.

C-Flex Easy Breathing Technology Visual Graph

C-Flex Easy Breathing Technology Visual Graph

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

★★★★★

(52)

Read Reviews

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Philips Respironics

React Health

ResMed

2 Years

31-dB

26 dBA

26.6 dBA

Yes

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Customer Reviews

See what other customers are saying.

Overall Rating

★★★★★

4.5 52 Reviews

5 Stars

4 Stars

3 Stars

2 Stars

1 Stars

★★★★★

Outstanding machine

Verified purchase | Feb. 25, 2010 | Verified CPAP.com Customer

This machine replaces an older model (8yrs) and has shown to be a far superior product. I like the fact that it is in two pieces rather than one. This means that when I travel I can carry the lighter part with me in my carry on and pack the heavier power supply in the suit case. Also, the C-Flex feature makes this machine usuable all night (8hr) versus just a few hours a night without this feature. Without this feature the tendency is to not wear the mask all night. However, this C-Flex feature makes exhaling into the CPAP very easy and relaxing which allows me to wear it all night - and sleep! It is also proving to be a very quiet machine.

★★★★★

M Series Pro C-Flex CPAP Machine

Verified purchase | Jan. 25, 2010 | Verified CPAP.com Customer

The machine is nice and compact. Although quiet when you just plug the hole, it makes more noise when you actually use it with a humidifier - but not too bad. The unit is easy to operate and does the job with ease. The price is great from CPAP.com.

★★★★★

Easy to Use

Verified purchase | Jan. 17, 2010 | Verified CPAP.com Customer

Easy to set up and use. Push one button if you want to turn on and off. Fairly small footprint. Hose exits rear of unit which is nice. This is the 4th M Series Pro C-Flex I have owned. The first one lasted 18 months. Then in lieu of a new one under warranty the supplier (not CPAP.COM) sent me refurbished units. The first refurbished unit failed in 2 months and the second refurbished unit failed immediately. The supplier then sent a different brand but it didn't work here in the Colorado winter because the humidifier produces a warm mist that condenses too easily in the tubing when cold. That's why I went back to this unit. It produces more humidity at a lower temperature. I hope that this machine lasts.

★★★★★

A User Friendly Machine

Verified purchase | Dec. 19, 2009 | Verified CPAP.com Customer

I purchased this machine with humidifier. I'm replacing a M series plus machine with this model. This machine is software ready where my other model was not. I like the size and quietness of machine. Very easy to use this machine. I'm happy with purchase.

★★★★★

REM star PRO series M

Verified purchase | Sep. 26, 2009 | Verified CPAP.com Customer

The REMstar Pro series M CPAP machine works very well.The auto start feature works well unlike my previous machine. The smaller size is great for placement on a night stand and the adjustable humidifier is much nicer than having all or nothing for a choice. My only issue is that the blue lights for the control buttons give off more light at night than I care for. All things said I'm very happy with my purchase.

★★★★★

M series CPAP

Verified purchase | Sep. 02, 2009 | Verified CPAP.com Customer

Excellent Cust Svc assistance and very quick delivery on the product. Great job by the CPAP.com team

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M Series Pro C-Flex CPAP Machine

This item has been discontinued by the manufacturer.

Check out the newer model

Get Your Sleep Back

M Series Pro CPAP Machine

M Series Pro CPAP Machine

Learn More About Your New Machine

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