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PR System One 50 Series Heated Humidifier

BY Philips Respironics  |  Item #1056209
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Shown with Machine separated. (Sold separately or with purchase of Bundle)
Shown with Machine separated. (Sold separately or with purchase of Bundle)
Shown with Machine. (Sold separately or with purchase of Bundle)
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How to Clean and Maintain your CPAP Equipment
Rainout, Causes & Solutions
Differences Between 50 Series and 60 Series System One Machines
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PR System One Heated Humidifier

Rain-out and water damage are large contributors to machine failures. The PR System One 50 Series humidifier and water chamber are breakthroughs in delivering consistent humidity without compromising water management. System One and Dry Box Technology make it possible for the PR CPAP machines to be virtually spill-free. This humidifier can be tilted, shaken, or turned upside down without water leaking back into the device. This humidifier is only compatible with Respironics 50 Series machines.

PR System One Heated Humidifier

Rain-out and water damage are large contributors to machine failures. The PR System One 50 Series humidifier and water chamber are breakthroughs in delivering consistent humidity without compromising water management. System One and Dry Box Technology make it possible for the PR CPAP machines to be virtually spill-free. This humidifier can be tilted, shaken, or turned upside down without water leaking back into the device. This humidifier is only compatible with Respironics 50 Series machines.

Learn More About This Product

Dry Box

Several unique designs are incorporated into the humidifier to prevent water from exiting the chamber. To start, Dry Box acts as a reservoir for any water ingress between the machine and humidifier. Also, the air outlet port has been moved from the side of the humidifier onto the top. This centers the entire delivery; minimizing the total water displacement around the hole. The water chamber is outfitted with a one-way valve, between the machine and the humidifier. In the event that the unit is moved, water that manages to escape the chamber gets trapped within the Dry Box.

This product is the Heated Humidifier for the PR System One line of machines. The machines are sold separately. This heated humidifier is compatible with the following machines:

Please Note: This humidifier is not the heated tube humidifier for use with the System One 60 Series line of machines by Respironics. If the heated tube humidifier is needed, click here: PR System One 60 Series Heated Tube Humidifier. More information on how to identify the series of machine is available on the Important Tips tab of this page.

System One Humidity Control

System One Humidity Control Technology analyzes ambient temperature and patient airflow to reach relative humidity at the mask. This prevents rain-out from occurring inside the CPAP tube. System One is the first solution in the industry that accounts for room humidity. Sensors inside and outside the CPAP machine closely monitor changes in humidity and prevents condensation from forming inside the tube.

User Manual:

The user manual included with this humidifier can be viewed and downloaded here: System One Humidifier.

Humidifier Modes
PR System One Heated Humidifiers Version 1.22 or higher have two modes:

  • Classic
  • System One Humidification

NOTE: The version of software installed on a machine is displayed on the screen when the unit is plugged into an outlet. The Humidification settings are displayed only when a PR System One Heated Humidifier is attached to the machine.

Classic Mode
The CPAP user who wants to control the heat setting on the humidifier should select "Classic" mode settings C1,C2, C3, C4 or C5. The "C" in front of the humidification setting indicates "Classic". This allows you to set the level of humidification.

System One Humidification Mode
The CPAP User who wants to allow the technology of the System One Humidification to set the level of humidification delivered based on the humidity present in the room air should select "System One Humidification". The humidification setting will show 1 - 5 but WITHOUT a "C" preceding the number.

Heating Off
If set to zero "0", the humidifier will act as a Passover Humidifier.

Accessing Humidification Settings:

  1. Humidifier must be attached to the machine
  2. Access the Set Up menu
  3. Scroll down the menu offerings to locate: "System One Humidification"
  4. If set to "On", the technology will set the amount of humidification delivered to the system based on the setting of 1 -5 with 1 being the least and 5 being the most
  5. If set to "Off", the user controls the heat setting based on C1-C5 with C1 being the lowest heat and C5 being the highest heat.

Maximum Fill Level Tips

  • Do not fill the water tank above the maximum fill line. Damage to the humidifier or therapy device may occur. If the water tank is overfilled, water may leak out of the tank inlet (located on the back of the tank) when installing the tank lid.
  • Use only room temperature distilled water in the tank. Do not put any chemicals or additives into the water. Possible airway irritation or damage to the water tank may result.
  • Remove the tank, empty all water, and replace the empty tank before transporting the humidifier base.
  • Do not attempt to fill the water tank while it is inside the humidifier.
  • To avoid spilling, do not disconnect the humidifier from the therapy device with water in the tank. Remove the water tank from the humidifier before disconnecting the therapy device.
  • Do not turn the humidifier on without the water tank installed. The Humidifier number setting must remain on 0 if there is no water in the water tank.
  • The humidifier door must be set in the open position before removing the water tank. Do not remove the water tank without making sure that the humidifier door locks into the open position.
  • Do not move the humidifier while the water tank has water in it.

How to Tell the Difference Between a 60 Series and 50 Series Machine

  1. Color
    • PR System One REMStar 60 Series Machines and Heated Humidifiers are charcoal gray with metallic silver side and instrument panels.
    • Original 50 Series PR System One units are dark gray with ivory colored side and instrument panels.
  2. Branding
    • The PR System One REMStar 60 Series Machines have the words "System One" in raised or embossed letters stamped in silver on both the machine and humidifier.
    • Original 50 Series PR System One units do not have raised lettering, the branding information is painted onto the unit.
  3. Machine and Humidifier Connections
    • PR System One REMStar 60 Series Machines and Heated Humidifiers have a 6 pin connection between the machine and humidifier.
    • Original 50 Series PR System One Units have a 4 pin connection between the machine and humidifier
    • PR System One REMStar 60 Series Machines and Heated Humidifiers have a mechanical connection between the machine and humidifier
    • Original 50 Series PR System One Units have 2 tabs on the humidifier that fit into 2 slots on the machine.
  4. Model Number Reference
    • PR System One REMStar 60 Series Machines label identification example: the label on the bottom of the PR System One REMStar 60 Series Auto CPAP lists: "REMStar Auto"; "REF" of 560P; and Serial Number identified by "SN". The number 560 references the part number of the machine.
    • Original 50 Series PR System One Machines label identification on the bottom of other versions of System One machines lists: Machine name; "REF" that does not have the number "6" in the second position from the left; and Serial Number identified by "SN". For example the label on the bottom of a PR System One REMstar Auto CPAP Machine with A-Flex lists "REMStar Auto" and "REF" of 550P. The number 550 references the part number of the machine.

Philips Respironics Part Number
The part number of reference number used by PR for the PR System One Heated Humidifier is 1056209. The manufacturer lists an internal manufacturer number of "REF 1056215" on the bottom of the humidifier. That is for manufacturer use only. Per the manufacturer the part number for the PR System One Heated Humidifier is 1056209.

Manufacturer Warranty

This product comes with a 2 Year Manufacturer Warranty. CPAP.com will work with the manufacturer on your behalf if the product 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 product 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 10101 Stafford Centre Drive, Stafford, TX 77477
  • Do not return accessory items such as the carry bag, hose or power cords
  • Loaner Humidifiers are available for rental during the warranty process
  • Email updates will be sent to keep you informed as the product 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.

What are the benefits of using a humidifier?
Many CPAP users experience nasal congestion and dryness of the nose and throat during treatment. This can be especially problematic for new users who are adapting to treatment. Humidification adds moisture to the air helping to reduce the symptoms of dryness and congestion.

Nasal congestion also leads to mouth breathing, which perpetuates the problem of dryness. If this is an issue for you, try a heated humidifier.
What is a heated humidifier?
A heated humidifier uses heat to warm the water to add moisture to the airstream. The heat is adjustable for more or less moisture. A heated humidifier water chamber is much smaller than a passover humidifier water chamber.

In our experience, it is common for CPAP users to report that their therapy is greatly enhanced by the use of a heated humidifier.

There are three types of heated humidifiers:

What is a passover humidifier?
A passover humidifier uses a chamber of room temperature water with the CPAP to add moisture to the airflow and reduce irritation to the nasal passages.

Air flows from the CPAP through a short hose to the humidifier chamber where the air "passes over" the water to pick up whatever moisture it can. The air then flows into the six foot hose to the mask.

Passover humidifiers may provide sufficient moisture with CPAPs set at lower-end pressures. However, if the moisture is not sufficient there is no way to increase the amount of moisture added. The water is room temperature. In cold climates, the water temperature will drop causing the CPAP air to become very cold, and causing the amount of moisture to be reduced.
What is an integrated humidifier?
An integrated humidifier is used with a specific CPAP and fits directly onto the machine. For most heated humidifiers, this design eliminates the need for a second hose as well as a second power cord.

An advantage of an integrated humidifier is that it works very closely with the CPAP machine to deliver humidification. Also, an integrated humidifier is a compact unit that uses fewer parts to provide moisture to the user.

A disadvantage of the integrated humidifier is the user will receive less moisture when it is used with a passover humidifier. The smaller surface area effects the amount of moisture produced. Also, a integrated humidifier will only function with the CPAP for which it was designed.

You can see if your machine has an integrated humidifier option by reviewing our Compare Charts.

An example of an integrated humidifier is the PR System One Heated Humidifier as seen below attached to a machine in the PR System One line. PR System One Heated Humidifier

Here are some of the integrated humidifiers we carry:

DreamStation Heated Humidifier
Transcend Heated Humidifier
IntelliPAP 2 Heated Humidifier with Pulse Dose Humidification
PR System One 60 Series Heated Tube Humidifier with Heated Tube
What is a built in humidifier?
A "built in" humidifier is designed as a part of the CPAP machine and cannot be removed or separated from the CPAP machine. As with an integrated humidifier, the design eliminates the need for a second hose or power cord. The water chamber can be removed for cleaning or replacement purposes.

The advantage of a "built-in" humidifier is its compact shape, which operates on fewer parts. This integrated design helps to ensure optimum moisturized comfort and effectiveness when CPAP therapy and humidification are used together. Also, it allows an option for the humidification to be turned off while the CPAP is blowing.

A disadvantage is that a built in humidifier may produce less moisture if used as passover because the surface area is typically smaller. Also, since the humidifier is "built in" to the machine, detaching it is not an option. This can be an issue for frequent travelers. Lastly, if the machine or humidifier stops working, the entire unit must be sent in for repair or replacement, not just the component that failed.

An example of a machine with a built in humidifier is the ICON Auto CPAP Machine with Built In Heated Humidifier and SensAwake as seen below. ICON Auto CPAP Machine with Built In Heated Humidifier and SensAwake
Here are some other machines we carry with built-in humidifiers:

AirSense™ 10 CPAP Machine with HumidAir™ Heated Humidifier
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
+ See More
What is a stand alone humidifier?
A stand alone humidifier is a component that will work with any CPAP and does not attach directly to the machine. It has its own power cord and a short hose to connect it to the CPAP. Generally it will sit next to the CPAP machine and is slightly larger than an integrated humidifier.

The advantage of a stand alone humidifier is the fact that it may be used with any CPAP machine.

The main disadvantages are that the size is often larger than either a "built in" or integrated humidifier and that a short hose is needed to connect it to the CPAP machine.

An example of a stand alone humidifier is the Fisher & Paykel HC150 Heated Humidifier as seen below. HC150 Heated Humidifier
How do I care for my humidifier?

To care for your humidifier simply empty and clean the water tank each morning. Only distilled water should be used in the humidifier to avoid mineral deposit build up. S9 Dishwasher Safe Humidifier Chamber

Here are some items that can help with caring for your humidifier:


CleanSmart CPAP Disinfectant Spray

Control III Disinfectant CPAP Cleaning Solution - 16 oz Concentrate

Control III Disinfectant CPAP Cleaning Solution - Home Care Kit

Hurricane CPAP Equipment Dryer

What does a humidifier prescription need to say?
A humidifier prescription must contain all of the following information:
  • One of the following words or phrases: "CPAP Humidifier", "Humidifier", "HH", "CPAP Supplies", "CPAP Mask", "CPAP", "Continuous Positive Airway Pressure", "APAP", "AutoPAP", "AutoSet", "Auto CPAP", "Auto Adjusting CPAP", "Self Adjusting CPAP", "BiPAP", "BiLevel", "VPAP", "BiPAP Auto", "BiPAP ST", "Synchrony ST", "VPAP ST"
  • Your physician's contact information
  • Your physician's signature
  • The patient's full name

Here are some of our top selling humidifiers:

PR System One 60 Series Heated Tube Humidifier with Heated Tube
Transcend Heated Humidifier
XT Heated Humidifier
+ See More
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 rainout?
Rainout is the accumulation of water in a CPAP tube due to warm moist air cooling and condensing on its way from your CPAP machine to your CPAP mask.

The image below from Fisher & Paykel explains how rainout is formed. Warm, moist air leaves the heated humidifier and travels through the CPAP tube. As air flows through the tube, the temperature of the room causes the tube to cool. As the tube cools, the air inside releases its moisture, and creates condensation in the hose.

Solutions to rainout include:
  • Raise the temperature of your bedroom.
  • Keep your CPAP machine at the same level as your bed.
  • Insulate your tubing with a hose cover like Snugglehose.
  • Reduce the temperature setting on your heated humidifier.
  • Purchase a CPAP machine with a rainout reduction comfort feature.
  • Some machine systems offer a compatible heated CPAP hose which maintains the temperature from the machine all the way to the mask, reducing the occurrence of rainout. The list of available heated hoses can be found here: Hoses With Heating Coils.
  • If your machines uses a standard hose, consider the Hybernite Heated Rainout Control System.


Conventional Humidification

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- Verified Customer, 10/25/22

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Verified purchase | Mar. 31, 2018 | Verified CPAP.com Customer
Works great. Got here quick!
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Verified purchase | Mar. 01, 2018 | Verified CPAP.com Customer
Yes! Vary quick and professional service.Was sent next day delivery,vary happy customer. THANK YOU.
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★★★★★

Hard to know if it is working

Verified purchase | Jan. 17, 2018 | Verified CPAP.com Customer
I ordered this new humidifier to replace my old one that wasn't working. After replacement, the new one isn't working either. So, perhaps the main unit is not providing power to heat up the water in the humidifier. Ideas? Comments?
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Great service

Verified purchase | Feb. 15, 2017 | Verified CPAP.com Customer
Product was exactly as ordered and arrived in two days
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cpap humidifier

Verified purchase | Dec. 28, 2016 | Verified CPAP.com Customer
It was just what I ordered and arrived in a timely manner. Could not ask for anything else. Thank you!
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Verified purchase | Apr. 21, 2016 | Verified CPAP.com Customer
Works very well
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