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- Puritan Bennett
Sandman Duo ST BiLevel CPAP Machine with Built In Heated Humidifier
BY Puritan Bennett Item #M-114824-US
3 Reviews
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Check out the newer model here
PR System One REMstar BiPAP ST Machine Need replacement parts & accessories? Shop Now
Sandman Duo ST BiLevel CPAP Machine Overview
The Sandman Duo ST is lightweight, compact and user-friendly. The Duo ST BiLevel features an intelligent pressure stability and respiratory events detection system that reacts to an obstruction event. Also, the Sandman Series includes the humidifier technology called HumidControl. The built in humidifier actually measures the temperature outside the chamber and adjusts the heater plate to minimize condensation. At 2.64 pounds, take the Sandman Duo anywhere and feel confident you will receive effective therapy.
The Sandman Duo ST BiLevel machine is designed to provide accurate therapy pressure using an advanced Adaptive Pressure Stability system that helps in detecting respiratory events. The Duo ST is equipped with pressure and flow sensors that detect apneas, hypopneas, inspiratory flow limitations and snoring. Once an event occurs, the machine reacts using an enhanced algorithm that smoothly adjusts the pressure during events.
The Duo ST allows BiLevel users to set a backup frequency, I/E ratio and pressure rise time. Use the I/E ratio to set the time between inhalation and exhalation. As an alternative, set the Duo ST to CPAP mode and turn on Pressure Alter feature which allows users to adjust their pressure up or down 1cmH20 without going into Clinical Mode.
The Sandman Series uses Covidien's unique Adaptive Pressure Stability (APS) technology that limits the peak to peak variations of CPAP pressure when a user breathes. Adaptive Pressure Stability responds quickly and accurately to several common conditions that result in changes from your prescribed pressure down to each breath.
Common conditions affecting Pressure
Each patient is different and Covidien has created FlowSens technology that allows you to adjust the machine's sensitivity along with setting the rise time. Allowing you to adjust the Sandman Duo ST to match your apnea needs.
True Circuit Calibration helps the Sandman Duo ST compensate for pressure variances created when using different styles of masks and tubing. For instance, when using a Full Face Mask, a digital signal processor microcontroller helps to improve flow generation capabilities, delivering an accurate pressure at the mask.
The Sandman Duo ST records compliance data which allows a digital signal processor to work interactively with the user and provides accurate flow control. For advanced therapy effectiveness, use the Sandman Therapy Software to help visualize user sessions and take control of your sleep therapy.
The device is quiet, discreet and user-friendly. Small and light, traveling with the Sandman is convenient. Use either AC or DC power from an external battery source. If altitude is an issue, the Auto Altitude Compensation feature accounts for barometric changes. All Sandman CPAP units contain an advanced pressure transducer that compensates for altitudes up to 9,000 feet, which could effect your cpap as much as 3cmH2o of pressure.
Covidien also addresses the need for humidity, incorporating a built-in heated humidifier, together weighing only 2.75 pounds. The humidifier is located to the rear of the CPAP with a water chamber that is easy to clean. Using a new technology, HumidControl, the humidifier provides the best temperature according to the relative humidity outside the water chamber. This prevents water from collecting in the CPAP hose and keeps the humidification level constant throughout the night.
Features
The Duo ST allows BiLevel users to set a backup frequency, I/E ratio and pressure rise time. Use the I/E ratio to set the time between inhalation and exhalation. As an alternative, set the Duo ST to CPAP mode and turn on Pressure Alter feature which allows users to adjust their pressure up or down 1cmH20 without going into Clinical Mode.
The Sandman Series uses Covidien's unique Adaptive Pressure Stability (APS) technology that limits the peak to peak variations of CPAP pressure when a user breathes. Adaptive Pressure Stability responds quickly and accurately to several common conditions that result in changes from your prescribed pressure down to each breath.
Common conditions affecting Pressure
- Switching Masks
- Mask leaks
- Altitude
- Natural respiratory effort
- Barometric pressure
- Sleep stage
- Body position
Each patient is different and Covidien has created FlowSens technology that allows you to adjust the machine's sensitivity along with setting the rise time. Allowing you to adjust the Sandman Duo ST to match your apnea needs.
True Circuit Calibration helps the Sandman Duo ST compensate for pressure variances created when using different styles of masks and tubing. For instance, when using a Full Face Mask, a digital signal processor microcontroller helps to improve flow generation capabilities, delivering an accurate pressure at the mask.
The Sandman Duo ST records compliance data which allows a digital signal processor to work interactively with the user and provides accurate flow control. For advanced therapy effectiveness, use the Sandman Therapy Software to help visualize user sessions and take control of your sleep therapy.
The device is quiet, discreet and user-friendly. Small and light, traveling with the Sandman is convenient. Use either AC or DC power from an external battery source. If altitude is an issue, the Auto Altitude Compensation feature accounts for barometric changes. All Sandman CPAP units contain an advanced pressure transducer that compensates for altitudes up to 9,000 feet, which could effect your cpap as much as 3cmH2o of pressure.
Covidien also addresses the need for humidity, incorporating a built-in heated humidifier, together weighing only 2.75 pounds. The humidifier is located to the rear of the CPAP with a water chamber that is easy to clean. Using a new technology, HumidControl, the humidifier provides the best temperature according to the relative humidity outside the water chamber. This prevents water from collecting in the CPAP hose and keeps the humidification level constant throughout the night.
Features
- Adaptive Pressure Stability
- True Circuit Calibration
- Digital Signal Processor
- FlowSens Technology
- Spontaneous Timing
- Extensive Compliance Data
- AC or DC Power Compatible
- Leak Compensation
- Auto Altitude Adjust
- LCD back-lit Display
- Rear-routed tubing
- Built-In Humidifier
- HumidControl Technology
- Parts Replacement Reminders
- Memory Card and Optional Software
This Product Includes...
- Sandman Duo ST BiLevel
- Built In Heated Humidifier
- Carry Case
- 6 Foot Hose
- Manuals
- AC Power Cord
- 2 Reusable Foam Filters
- Memory Card
Machine Specifications
| Pressure Range | 3-25 cm H20 |
| Backup Frequency | increments of 1 from 4-25 bpm |
| I/E Ratio | increments of 1/.05 from 1/4-1/0.5 |
| Flow Output | 190 LPM @ 20cmH2o |
| Ramp Time | 0-45 mins in 5 min increments |
| Starting Ramp Pressure | From 3cm up to CPAP pressure, CPAP-user-adjustable |
| Dimensions | 4.7" H x 6.9"W x 7.5"D |
| Weight | 2.2 lbs CPAP 2.64 lbs with humidifier and CPAP |
| Altitude Compensation | Automatic - maximum height 9000 feet. |
| Electrical Requirements | 100 - 240 AC, 12volt DC |
| Power Consumption | 50W Max without Humidifier, 90W max with humidifier at max setting |
| Noise Level | 26 dB at 1 meter with ISO17510-1:2002: |
| Maximum Power Consumption | 50W without humidifier, 90W with humidifier at maximum setting |
Humidifier Specifications
| Operating Temperature | 41°F to 95°F (5°C to 35°C) |
| Storage Temperature | -4°F to 140°F (-20°C to 60°C) |
| Dimensions: | Built-In |
| Weight (with water tank empty): | Approximately 2.4 Ounces (< 1kg) |
| Water Capacity | 350ml at recommended water level |
| Type of Protection Against Electric Shock: | Class II Equipment |
| Degree of Protection Against Electric Shock: | Type BF Applied Part |
| Equipment Type: | IPX1: Drip Proof Equipment |
| EMC Operation: | Continuous |
| Electromagnetic Compatibility: | The device meets the requirements of EN 60601-1-2, 2nd edition. |
| Heater Settings | 1 to 10 adjustable |
| Humidity Range: | Up to 40 mg H2O/l |
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
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- Free Prescription Request System
User Manual:
The user manual included with this machine can be viewed and downloaded here: Sandman User Guide.
Manufacturer WarrantyThis 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.
Universal Power
This system operates 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.
Universal 12 Volt DC Power Cord
This machine 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. The IntelliPAP can be powered by plugging the 12volt DC Power Cord into a cigarette lighter plug. This is ideal for traveling by car, boat, or recreational vehicle that is equipped with a cigarette lighter plug.
CPAP.com Battery Kit with Universal 12 Volt DC Cable
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 12 Volt DC Power Cord.
Respironics Battery Kit with Universal 12 Volt DC Cable
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 12 Volt DC Power Cord (connects CPAP to cigarette lighter socket).
This system operates 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.
Universal 12 Volt DC Power Cord
This machine 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. The IntelliPAP can be powered by plugging the 12volt DC Power Cord into a cigarette lighter plug. This is ideal for traveling by car, boat, or recreational vehicle that is equipped with a cigarette lighter plug.
CPAP.com Battery Kit with Universal 12 Volt DC Cable
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 12 Volt DC Power Cord.
Respironics Battery Kit with Universal 12 Volt DC Cable
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 12 Volt DC Power Cord (connects CPAP to cigarette lighter socket).
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What is the difference BiPAP and BiPAP ST?
A BiPAP (also referred to as a BiLevel or VPAP) delivers two set pressures, a higher pressure for inhalation and a lower pressure for exhalation.
BiPAP and BiPAP ST machines are similar, as they are both designed to provide the same airway pressure. The difference between a BiPAP and a BiPAP ST is the Spontaneous Timed feature. The ST responds to the user when the minimum number of breaths per minute has not been met. This machine ensures all breaths occur by triggering the user to take another breath within the minute.
For example, a BiPAP might be set at the following:
A BiPAP ST might be set at the following:
BiPAP and BiPAP ST machines are similar, as they are both designed to provide the same airway pressure. The difference between a BiPAP and a BiPAP ST is the Spontaneous Timed feature. The ST responds to the user when the minimum number of breaths per minute has not been met. This machine ensures all breaths occur by triggering the user to take another breath within the minute.
For example, a BiPAP might be set at the following:
- Inhalation Pressure - 10
- Exhalation Pressure - 5
A BiPAP ST might be set at the following:
- Inhalation Pressure - 10
- Exhalation Pressure - 5
- 12 BPM (Breath Per Minute)
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.
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.
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.
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 does a BiPAP ST prescription need to say?
A BiPAP ST prescription must contain all of the following information:
- One of the following words or phrases: "BiPAP ST", "Synchrony ST", "VPAP ST"
- Your physician's contact information
- Your physician's signature
- The patient's full name
- A backup rate or BPM setting.
- Your inspiration pressure (Also called IPAP or breathing in pressure)
- Example: IPAP 13 CM/H20
- Example: IPAP 13
- Example: IPAP 4 CM/H20
- Example: IPAP 4
- Your expiration pressure (Also called EPAP or breathing out pressure)
- Example: EPAP 13 CM/H20
- Example: EPAP 13
- Example: EPAP 18 CM/H2O
- Example: EPAP 18
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.
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
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:
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.
How do I use a battery to operate my CPAP?
All machines can connect to DC power. Some machines are configured to operate on DC Power and have a DC power outlet. Other machines require AC power and will need an Inverter that turns DC power to AC power.
Having the proper equipment is the biggest key to successfully operating the machine from a battery. For example, if your machine does have a DC outlet and you want to run your machine from a marine battery, be sure to get the correct DC cable for the machine, as well as an adapter cable with alligator clips that fits over the cigarette lighter plug.
CPAP.com sells complete battery kits with everything you need for many machines including the correct cables for those machines and batteries. If you have questions about the specific power needs of your machine, review the 'Power' tab found on the machine's product page, or give us a call at 1-800-356-5221.
What are the CPAP, BiPAP, Sleep Apnea, and Oxygen related HCPCS, CPT or billing codes?
- A7034 is Nasal Mask
- A7034 is Nasal Pillow Mask
- A7030 is Full Face Mask
- A7027 is Hybrid Mask
- A7044 is Oral Interface Mask (Oracle)
- A7035 is Headgear for Mask - Any Style
- A7036 is Chinstrap - Any Style
- A7032 is Replacement Nasal Mask Cushion
- A7033 is Replacement Nasal pillows
- A7031 is Replacement Full Face Mask Cushion
- A7028 is Replacement Hybrid Mask Cushion
- A7029 is Replacement Hybrid Mask Nasal Pillow
- A7046 is Replacement Humidifier Chamber
- A7037 is Tubing / Hose - Long & Short Tubes
- A4604 is Heated Tubing
- A7038 is Disposable Filter (White / Paper)
- A7039 is Washable Filter (Gross Particle / Foam/ Black)
- E0601 NU is CPAP Purchase
- E0601 NU is APAP Purchase
- E0470 NU is BiPAP Purchase
- E0470 NU is BiPAP Auto Purchase
- E0471 NU is BiPAP ST Purchase
- E0471 NU is BiPAP Auto SV Purchase
- E0562 NU is Heated CPAP Humidifier
- E0561 NU is Passover or Cool CPAP Humidifier
- E0601 RR is CPAP Rental
- E0601 NU is APAP Rental
- E0470 RR is BiPAP Rental
- E0470 RR is BiPAP Auto Rental
- E0471 RR is BiPAP ST Rental
- E0471 RR is BiPAP Auto SV Rental
- E1356 is Oxygen Concentrator Battery
- E1357 is Oxygen Concentrator Battery Charger
- E1358 is Oxygen Concentrator DC Cable
- E1390 is Portable Oxygen Concentrator
E1399 is Miscellaneous and is used for other CPAP and Oxygen items.
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.
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:
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:
- Stand Alone Humidifiers
Stand Alone Humidifiers can be used with almost any machine as long as an integrated humidifier is not being used and the machine does NOT have a built in humidifier. The Fisher & Paykel HC150 Heated Humidifier With Hose, 2 Chambers and Stand is a stand alone heated humidifier that includes ambient tracking to keep the humidity consistent independent of room temperature.
- Integrated Humidifiers
Integrated Humidifiers connect directly to the machine the humidifier was made to be used with. This provides the convenience of being able to remove the humidifier from the machine for traveling or other purposes. Here are some of the integrated humidifiers we carry:
PR System One 60 Series Heated Tube Humidifier with Heated Tube
Transcend Heated Humidifier
XT Heated Humidifier
- Built In Humidifiers
Built In Humidifiers are permanently affixed to their machine and cannot be removed. The chamber can still be removed for cleaning, however the heating element is a part of the machine. The advantage of built in humidifiers is they generally take up less space than a machine with an integrated or stand alone humidifier. Here are some machines that have a built in humidifier:
AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
ICON Auto CPAP Machine with Built-In Heated Humidifier and ThermoSmart Heated Hose
iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
+ See More
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.
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
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.
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
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. 
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
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.
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.
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.
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
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.
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 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.
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.
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:
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.
Why do I need to use distilled water with in my humidifier chamber?
Use distilled water to help keep the humidifier chamber clean and mineral deposit free. Tap water should not be used as it will leave hard white mineral deposits in the chamber as the water evaporates, or it may lead to mold growth. Cases of lung disease have been connected to using contaminated well water in a CPAP humidifier.* Source
If distilled water is not available where you live, use bottled water. It will be important to clean the chamber each morning, do not leave standing water in the chamber between uses.
If distilled water is not available where you live, use bottled water. It will be important to clean the chamber each morning, do not leave standing water in the chamber between uses.
What does a humidifier prescription need to say?
A humidifier prescription must contain all of the following information:
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
- 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
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.
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.
What data capable machines are available?
- CPAP machines which record full data (such as AHI and leak info): AirSense™ 10 CPAP Machine with HumidAir™ Heated Humidifier
- AirSense™ 10 Elite CPAP Machine with HumidAir™ Heated Humidifier
- DreamStation Pro CPAP Machine
- ICON Premo CPAP Machine with Built-In Heated Humidifier and ThermoSmart
- IntelliPAP Standard Plus CPAP Machine with SmartFlex
- Luna CPAP Machine with Integrated H60 Heated Humidifier
- PR System One REMStar 60 Series Pro CPAP Machine with Bluetooth
- RESmart™ CPAP Machine with RESlex with Heated Humidifier
- Transcend miniCPAP™ Machine
- Transcend EZEX miniCPAP™ Machine
- Transcend II Travel CPAP Machine
- Z1 Travel CPAP Machine
AutoPAP ("Autotitrating CPAP" or "APAP") machines which record full data:
- AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
- AirSense™ 10 AutoSet For Her CPAP Machine with HumidAir™ Heated Humidifier
- Curasa Auto CPAP Machine with EUT
- DreamStation Auto CPAP Machine
- iCH Auto CPAP Machine with PVA and Built-In Heated Humidifier
- ICON Auto CPAP Machine with Built-In Heated Humidifier and SensAwake
- IntelliPAP AutoAdjust Travel CPAP Machine with SmartFlex
- IntelliPAP 2 AutoAdjust Auto CPAP Machine
- Luna Auto CPAP Machine with Integrated H60 Heated Humidifier
- PR System One REMStar 60 Series Auto with Bluetooth
- RESmart™ Auto CPAP Machine with RESlex with Heated Humidifier
- S9 AutoSet™ CPAP Machine
- S9 AutoSet™ CPAP Machine with H5i™ Heated Humidifier for Her
- Transcend Auto miniCPAP™ Machine with EZEX
- XT Auto CPAP Machine
- Z1 Auto Travel CPAP Machine
BiLevel ("BiPAP") machines which record full data:
- AirCurve™ 10 VAuto BiLevel Machine with HumidAir™ Heated Humidifier
- AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
- DreamStation BiPAP Pro Machine
- DreamStation BiPAP Auto Machine
- IntelliPAP AutoBiLevel Machine with SmartCode
- IntelliPAP BiLevel Machine with SmartCode
- PR System One REMStar 60 Series BiPAP Auto with Bluetooth
- RESmart BPAP 25A Auto Bi-Level Machine with RESlex and Heated Humidifier
- S9 VPAP™ Auto BiLevel Machine
- S9 VPAP™ S BiLevel Machine
- CPAP Machines that only record compliance data (hours used) are: Curasa CPAP Machine with EUT
- DreamStation CPAP Machine
- IntelliPAP Standard Travel CPAP Machine
- S9 Escape™ CPAP Machine with EPR™
- XT Fit CPAP Machine
What does a BiPAP prescription need to say?
A BiPAP prescription must contain all of the following information:
Here are some of our top selling BiPAP machines:
IntelliPAP BiLevel Machine with SmartCode
AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
DreamStation BiPAP Pro Machine
+ See More
- One of the following words or phrases: "BiPAP", "BiLevel", "VPAP"
- Your physician's contact information
- Your physician's signature
- The patient's full name
- Your inspiration pressure (Also called IPAP or breathing in pressure)
- Example: IPAP 13 CM/H20
- Example: IPAP 13
- Example: IPAP 4 CM/H20
- Example: IPAP 4
- Your expiration pressure (Also called EPAP or breathing out pressure)
- Example: EPAP 13 CM/H20
- Example: EPAP 13
- Example: EPAP 18 CM/H2O
- Example: EPAP 18
Here are some of our top selling BiPAP machines:
IntelliPAP BiLevel Machine with SmartCode
AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
DreamStation BiPAP Pro Machine
+ See More
View More +
Overall Rating 5.0
Great Machine, LOVE this humidifier!
Verified Customer9/26/2009
Verified Customer
Verified purchase
compact,quiet,easy to use
1 person found this helpful.
Verified Customer
Verified purchase
Great Machine, LOVE this humidifier!
I used another manufacturer’s Auto-titrating BiPAP for years to treat my complex apnea (both obstructive and central apnea). I had failed CPAP testing in the hospital sleep lab because I was unable to exhale against sufficient pressure to minimize my obstructive apneas, so we went to the auto-titrating BiPAP to resolve my apneas, and my min EP and max IP pressures were determined. Synchronization combined with auto-titration seemed to resolve my central apneas by forcing progressively harder puffs of air — the only drawback was in this process the machine would often “run away” and go all the way to the machines max pressure of 25 and stay there. As a result, I would wake with the mask blasting air everywhere and I not able to breathe against it. The only resolution was to turn the machine off and back on. I purchased the Sandman Duo ST machine because of the very small and light size of the machine, the description of the “adaptive algorithm” in the machine, and the synchronization feature. It would be much more convenient for travel, and seemed it would possibly resolve issues I had with my previous machine. First, this is NOT an auto-titrating machine, as I had believed from the description of the “adaptive algorithm. Thus, because my pressures were determined as min/max auto-titration, the settings in the Sandman when I received it were way off. Fixed EP/IP pressures were not determined during my sleep study. I could not breathe with these settings, and short of a new hospital sleep study, trial and error were necessary to find pressures that promote good sleep. Are they the “correct” pressures? Neither my doctor nor I can really tell given the limited data the software provides. That said, with this machine I am sleeping very well. I turn frequently during the night and my respiratory rate changes significantly with position and other factors. Though breathing is fully synchronized by the machine, the sensitivity is such that the second I “exhale against the inflow,” the machine switches to exhalation and resynchronizes. My partner reports that I do not snore and, more important, don’t seem to have uncorrected central apnea episodes. Bottom line is that once the pressures and other settings were determined, this very compact machine really does the job. Another real plus is that I have always had to use the humidifiers on previous machines only in pass-over mode. Even on a heat setting of 1, I experienced drown-out. With this machine, I am able to set humidification level where I need it, currently at 4, and experience no drown-out. The humidity sensor really works. Going from an auto-titrating machine with only min/max titrated pressures to a fixed-pressure BiPAP was quite difficult, and gave a bad first impression of the Sandman. Had I had a prescription with correct pressures for this type of BiPAP in the beginning, I would have immediately known this machine is a champion. With correct settings now in the Sandman, I have given up all thoughts of going back to my auto-titrating machine. more...
19 people found this helpful.
Verified Customer
Verified purchase
Excellent Machine
Received my Sandman Duo ST BiLevel CPAP Machine a few days ago. It was easy to setup and operate. The machine operates perfectly giving me a restful sleep for the first time in many years. I live overseas and the machine arrived 6-days after ordering. I was able to track the progress of the shipment via UPS and was able to call UPS for a last minute change of delivery as it was arriving on the weekend when my office was closed. It was rerouted to my home so I could use it immediately. Thanks all for the speedy order and delivery. more...
9 people found this helpful.
1 - 3 of 3 Reviews
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Basic Features
ManufacturerCovidienPhilips RespironicsResMedTypeBiPAP STBiPAPBiPAP AutoWarranty2 Years2 Years2 YearsSound Level26 dB25.8 dBA26.6 dBAQuietYesYesYesManuals IncludedPatient/ClinicianPatientPatient/Quick SetupDimensions
Travel SizedYesYesYesUnder 3 lbsYesYesYesMachine Weight2.75 lbs1.56 lbs2.75 lbsEntire Weight5.10 lbs4.37 lbs5.1 lbsEntire Size6.9" x 7.5" x 4.7"11.7" x 7.6" x 3.3"10.04" x 4.75" x 5.91"Entire Package Size11" x 5.5" x 13.8"15" x 8.5" x 5.5"13.24" x 10" x 5"Machine Size OnlyNA6.2" x 7.6" x 3.3"NAHumidifier Features
Heated HumidifierBuilt InDreamStation HumidifierHumidAirBuilt-In HumidifierYesNoYesHeated Humidifier TypeBuilt InIntegratedBuilt-InAmbient Rainout ReductionNoDreamStation Heated TubeAuto ClimateControlIntegrated Heated HoseNoYesClimateLineAirHumidifier Water Capacity325 mL380 mLPressure Features
Auto Pressure AdjustmentNoYesYesPressure Range4-25cm H2O4 - 25 cm H2O4-25 cm H2OEPAP Pressure Range3-25 cm H204 - 25 cm H2O3-25 cm H2OEasy BreathingNoBi-FlexEPR with Easy-BreatheRampYesYesYesCPAP ModeIPAP=EPAPYesYesLeak CompensationN/AYesYesMax Operating Altitude7,500 ft8,500 ftPower Features
Direct Battery OperationYesYesYesVoltage Range100-240V AC100 - 240 V AC100-240VOptional DC CableYesYesYesIntegrated BatteryNoNoNoSoftware Features
Advanced Software/DataMSD; OSMSD, OSYesData CardYesYesYesOptional SoftwareSandMan TherapyDreamMapperResScanAdditional Features
Auto Altitude AdjustmentAutoYesYesAuto ON/OFFNoYesYesMask Off AlertLCDNoNoSpontaneousYesNoYesTimedYesNoNoDesigned For HerNoNoNoBack Lit DisplayYesYesBacklight Shuts OffYesYes
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