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Top Reviews

"Have now been using the Oral CPAP Mask for the last 12 years with full satisfaction."

June 9, 2014

"Thus far, the mask has performed better than I expected. I'm sleeping well and wearing the mask much longer at night (6 to 7 hours) then I thought I could"

April 5, 2008

Product Overview

The Oracle HC452 Oral CPAP Mask is a unique mask which delivers CPAP therapy through the mouth only. It features diffused exhalation, an adjustment dial, and single strap headgear.

Manufactured by Fisher & Paykel.

Product Features

Fisher & Paykel Healthcare is the first company to develop an oral mask. The Oracle HC452 delivers air pressure only through a mouthpiece. The mask has been clinically proven to treat OSA and offers a viable alternative to a full face mask, with less structure against the face. This is the second generation of Oracle and builds on the original design.

Here is how it works:

The mouthpiece comes in two sizes and is placed behind the lips and in front of the teeth. An outside flap is then fitted into the mouthpiece and folded over the lips. This combination keeps the device stable in the mouth and has been redesigned without the inner flap of the earlier design, which rested on the tongue.

The features of the Oracle mask include:

  • Bias Diffuser. The Oracle mask has an exhalation vent design of a series of small holes and uses a filter to help reduce noise. The mask comes with five filters.

  • Rotating Adjustment Dial. This dial adjusts the space between the SnapFlap Cover and SoftSeal mouthpiece to increase comfort and stability and can be used after the mask has been fitted into the mouth. This is an upgrade to the earlier design of the Oracle.

  • Single Strap Easy-Release Headgear. One strap around the back of the head keeps the Oracle stable and a swivel in the front of the mask allows free rotation of the CPAP hose. The headgear is adjusted once, then easily removed with just a pull of the Easy-Release cord. No ongoing adjustments are needed. The headgear of the Oracle is latex free, as are all other headgear by Fisher & Paykel.

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    This Product Includes...

    • Mask
    • Headgear
    • Nose Plugs
    • Flexitube
    • Diffuser Filters - 5

    Product Specifications

    Flexi-tube Length: 5 inches EXCLUDING swivel

    Materials Used:

    • Mask Base: Polycarbonate (PC) / Silicone (LSR)
    • Non-Rebreathing Valve: Polycarbonate (PC) / Silicone (LSR)
    • Elbow: Polycarbonate (PC)
    • Exhaust Cover: Polycarbonate (PC)
    • Exhaust Diffuser: Polyester Fiber
    • Male/Female Swivel: Polycarbonate (PC)
    • Flexitube: Polyethylene (LLDPE)
    • Slider: Polyetherimide (PEI)
    • Soft Seal (M / L): Silicone (LSR)
    • Nasal Plugs: Silicone (LSR)
    • Headgear: Lycra / Polyurethane Foam Laminate
    • Pressure Ports Connector (Euro Only): Polycarbonate (PC) / Santoprene (TPE)

    CPAP.com always offers these services:

    • 8 am to 8 pm CST Toll Free Phone and Email Support
    • 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

    Important Tips

    Heated Humidification Notes

    Heated humidification is required with use of the Oracle 452 Oral Mask due to the CPAP air bypassing the nasal airways which normally moisten the air. With higher CPAP pressures, even a heated humidifier may not provide adequate moisture, especially for patients who also take medications that dry the mouth.

    We would first recommend a full face mask due to this humidification issue. Air leaking through the nose can be an issue as well and nasal plugs of various sizes are included with the mask. We have many remarks that the nasal plugs can leak, although this is usually negligible.

    If the CPAP pressure is low enough, the Oracle is a good alternative to a full face mask, especially for people with nasal blockage, either from chronic congestion, deviated septum or other type of tissue blockage.


    • Do not over-tighten headgear to avoid pressure on the teeth.
    • People who suffer from bruxism (teeth clenching or grinding) should not use the Oracle mask.
    • If the user has loose teeth, consult a dentist prior to using the Oracle mask.
    • If loose teeth or periodontal disease develops after beginning use of the Oracle mask, consult a dentist.
    • If a user has dentures or missing teeth, it is possible to experience leaks when using the Oracle.

    Where do I find the size?

    The mask frame does not have an identifiable size because it offers a universal fit to the small and large Oracle HC452 softseal cushions.

    To find the size of the softseal cushion, remove the cushion from the mask frame. Hold the two silicone flaps, so the top of the two small openings is facing the user. With the small openings facing inward, the correct direction can be determined by the words "S M A L L" and "L A R G E." If either of these words appear embossed into the silicone above the small openings, then the user has located the size of the cushion. If the words are not visible, turn the cushion 180 degrees to view the other side.

    CPAP Video & FAQ

    Frequently Asked Questions (FAQs)

    Why might I need an oral face mask?
    An individual who cannot breathe through their nose at all due to a severely deviated septum, nasal congestion or facial injury may find the delivery of the CPAP air stream through only the mouth preferable to a full face mask which delivers air to both the nose and mouth.

    Oral masks deliver airflow only to the mouth. The nasal openings or nares are closed with nose plugs. It is highly recommended to use a heated humidifier with an oral mask. Most users find there is a period of adjustment while becoming accustomed to an oral delivery mask.
    Oracle HC452 Oral CPAP Mask
    Do you have a guide to help me choose the right mask?
    Yes, we created a Help Me Choose guide to help you select the right mask or machine according to your preferences. The guide asks you a series of questions regarding your preferences and your facial features. Based on your answers we provide you with a comparison chart of the masks that meet your criteria. Get started here:

    Help Me Choose - Mask
    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
    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.

    How do I care for my mask?

    Masks should be washed daily with warm water and gentle soap or baby shampoo. Let the mask air dry. Never use antibacterial soap as it will break down the silicone of the mask cushion. Avoid soaps that include lotion which can coat the mask and cause it to lose its seal. A safe cleaner is the Control III Disinfectant CPAP Cleaning Solution. Remember, going to bed with a clean face will improve your seal and protect the lifespan of your mask. Citrus Mask Wipes

    The best time to clean your mask is in the morning after use. This removes the oils left behind from your skin which can reduce the lifespan of your mask. We recommend using Mask Wipes to make daily morning cleaning easy. The mask wipes are made from materials that will not break down your mask.

    Citrus Mask Wipes

    For customers who want to completely disinfect their mask and accessories, there's an even better option than wipes. The Lumin Mask and Accessories Cleaner uses powerful UV light to disinfect, killing almost all bacteria almost instantly. It's not a cleaner and doesn't scrub or wash anything, but for simple disinfecting the Lumin works great!

    Here are some other cleaning products to help with keeping your mask fresh:

    Citrus II CPAP Mask Spray Cleaner

    Control III Disinfectant CPAP Cleaning Solution - Home Care Kit

    Hurricane CPAP Equipment Dryer

    Unscented CPAP Mask Wipes

    Lumin CPAP Mask and Accessories Cleaner

    How often should I replace my mask?
    Medicare allows for mask cushion replacement every three (3) months, and a complete mask system replacement every six (6) months. CPAP manufacturers and vendors suggest these replacement schedules as well.

    In our experience, most mask cushions begin to deteriorate after about six months of use. The cushion eventually becomes too soft to hold a seal. The headgear straps lose elasticity and must be tightened more and more to get the same quality seal.

    We strongly suggest replacing cushions and pillows as soon as they start to soften. Air leaks may reduce the effectiveness of CPAP therapy and headgear that is too tight may cause facial sores at pressure points. In most cases, replacement headgear is available if it is stretched out or the Velcro worn out.

    To see what parts of your mask are replaceable refer to our Replacement Part Finder. Just search for your mask to see all of the replaceable parts.
    I breathe through my mouth, what are my options?
    People who have a deviated septum, small nostrils, or who suffer from seasonal allergies or chronic sinus issues, may breathe through the mouth rather than the nose. If you are a person who breathes through your mouth you may be able to wear most masks with a few adaptations. Add a Chinstrap if using nasal pillows, nasal prongs or a nasal mask.
    Sullivan Chinstrap

    A full face mask or hybrid mask can be used without a chinstrap because the seal covers both the nose and mouth. A full face mask will allow you to breathe through your mouth or through your nose.

    If you suffer from chronic sinus issues, a full face mask or an oral face mask are good options. Oral masks work best for mouth breathers with blocked nasal passages. You must use a heated humidifier with the oral mask. CPAP.com sells the Oracle HC452 Oral CPAP mask.

    If you are a mouth breather who cannot or who does not want to wear a chinstrap, please see our recommended masks for Mouth Breathers.

    Here are some suggested items that may help with mouth breathing:

    Hybrid Masks
    Oral Masks
    Full Face Masks

    What are the CPAP, BiPAP, Sleep Apnea, and Oxygen related HCPCS, CPT or billing codes?

    E1399 is Miscellaneous and is used for other CPAP and Oxygen items.
    What does a mask prescription need to say?
    A mask prescription must contain all of the following information:
    • One of the following words or phrases: "CPAP Mask", "CPAP Supplies", "CPAP Humidifier", "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 masks:

    DreamWear Nasal CPAP Mask with Headgear - Fit Pack
    ComfortGel Blue Full Face CPAP Mask with Headgear
    AirFit™ P10 Nasal Pillow CPAP Mask with Headgear
    + See More
    Visit the Learning Center

    Replacement Parts

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