Free CPAP success course with purchase

Luna G3X Auto CPAP Machine

$ 873

The Luna G3X Auto CPAP combines auto-adjusting pressure therapy with expanded connectivity and enhanced data tracking capabilities. An integrated humidifier and heated tubing help improve comfort, while its intuitive design makes setup and daily use simple. It offers modern CPAP technology at an accessible price point.

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IN STOCK Ships in 1-2 business days

 
This product requires a prescription before shipment.

Prescription Required

This product requires a valid prescription from a licensed physician. Sleep Doctor can help you obtain one or you may upload your own after purchase.

Product Details

Key Benefits

  • Clinically Validated Algorithm: The G3X accurately identifies obstructive breathing events, as confirmed by independent testing.
  • SMART Technology: The machine automatically adapts to your breathing patterns to deliver responsive, consistent therapy.
  • Streamlined Care: The React Health Connect integrated cloud platform allows for easy communication between patients and providers with actionable therapy insights.
  • 5-Year Warranty: Luna is offering an industry-leading 5-year warranty for extended support and peace of mind throughout your therapy journey.

This machine is best for:

  • Users who want advanced connectivity features
  • People looking for a modern APAP machine without a premium price tag
  • Those transitioning from an older CPAP device
Care

Daily

  1. Humidifier Chamber: After each night of use, pour out any remaining water from the humidifier tank. Rinse with warm water and let air-dry. Only use distilled water in the chamber.
  2. Mask: Use a mild, non-alcohol cleanser or wipe on your mask cushion and frame to remove oils, dust, and other residue.
  3. Hose: Hang your tubing to allow any remaining moisture to evaporate before your next use.

Weekly

  1. Mask: Disassemble the mask and wash with warm water and a gentle, CPAP-safe soap. Rinse well and let fully dry away from direct sunlight.
  2. Humidifier Chamber: Wash the humidifier chamber with warm water and a mild soap, rinse thoroughly, and allow to air-dry completely.
  3. Hose: Detach the tubing and rinse with warm water. Use a mild soap and scrub the interior with a tube brush. Hang to air-dry before reconnecting.
  4. Filters: Check the disposable filters and replace if they appear discolored or clogged. If your G3X uses reusable filters, rinse and let them air-dry before reinserting. Replace reusable air filters every 6 months and disposable filters every 2 weeks.

Shipping & Returns

Free Shipping for orders $50 and above in contiguous U.S. For orders under $50.00, the shipping rate is $7.99. Orders shipping to Alaska, Hawaii, Puerto Rico, Guam, and Virgin Islands are subject to an additional shipping fee.

Expedited Shipping

Orders under $50.00:

  • 2-day shipping - $19.99
  • Overnight shipping - $29.99

Orders over $50.00:

  • 2-day shipping - $29.99
  • Overnight shipping - $49.99

Order must be placed with approved prescription (where applicable) before 10 a.m. ET to ship same day. Excludes Saturday and Sunday delivery.

Expedited shipping is not available:

  • To Alaska, Hawaii, PO boxes and some rural areas.
  • During excluded holidays

Some orders require a prescription and by law cannot be processed and shipped until a valid prescription is on file and verified by Sleep Doctor. We can help you obtain a prescription renewal at no extra charge if your prescription has expired or is not accessible. Just place your order and follow the instructions provided to schedule a complimentary virtual consultation with a board-certified sleep specialist.

Please note that your order may ship in multiple packages.

Once your order ships, you will receive a tracking number and estimated date of delivery. Most customers receive their orders within 4-7 days of shipping. Carrier delays are outside of our control.

Find our full Shipping & Returns policy here.

More than just a CPAP machine

Expert, hands-on support for every stage of therapy

Personalized setup

Mask fitting, pressure comfort, and one-on-one recommendations out of the box

Ongoing support

Help with troubleshooting leaks, dryness, machine adjustments, and compliance

Resupply made easy

Automatic replacements with insurance-friendly reminders for minimal hassle

Included with your purchase: 30 days of guided support

Whether you’re adjusting to CPAP for the first time or dialing in a better routine, our guided program helps you improve comfort, build habits, and make real progress that you'll feel every day.

It's designed to help new users:

Get comfortable faster, fix common early issues, and build confidence night by night.

For experienced CPAP users, we help:
Optimize mask fit and comfort, improve consistency and sleep quality, and fine-tune your setup.

*$250 value, yours free with any machine purchase.

Learn More

Meet your Luna G3X

Smart A Custom Pressure Response

When using the Luna G3X with the Smart A feature on, the device can automatically adjust pressure whenever it detects a respiratory event.

Find a mask that fits you

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Real patients, real results

Thousands of people have reclaimed their nights

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Not sure where to start?

Most people aren’t—we’ll help you find the right fit for your needs.

Call us at (844) 757-9355 for help.

Hands-on care, not AI

Our specialized clinical care team offers help that’s easy to follow and care that makes a difference

  • Diane S.

    Lead Respiratory Therapist, Sleep Disorders Specialist

  • Rachael G.

    Registered Polysomnographic Technologist

  • Scott P.

    Registered Polysomnographic Technologist

  • Tamra Y.

    Certified Respiratory Therapist, Registered Polysomnographic Technologist

  • Samantha B.

    Registered Respiratory Therapist

  • Crystal C.

    Registered Respiratory Therapist

  • Crystal Christmas

    Registered Respiratory Therapist, Sleep Disorders Specialist

  • Terri R.

    Registered Polysomnographic Technologist

  • Carrie R.

    Registered Respiratory Therapist

  • Riley R.

    Registered Respiratory Therapist

  • Savanna D.

    Registered Polysomnographic Technologist

  • Ana J.

    Registered Respiratory Therapist

Luna G3X FAQs

What is the difference between the Luna G3 and Luna G3X APAP?

The Luna G3 and Luna G3X APAP machines offer many of the same core features, including automatic pressure adjustment, integrated humidification, and compatibility with standard CPAP masks. The Luna G3X is a newer version that uses an updated internal design and does not use polyurethane sound-abatement foam, while still maintaining quiet operation and reliable therapy performance.

Do I need to use both filters with the Luna G3X APAP?

The Luna G3X APAP machine should not be used with only the disposable filter installed. The machine must be used with the reusable foam filter, either by itself or together with the disposable filter. Both filters are included with the device so users can install them according to the manufacturer’s recommendations.

Does the Luna G3X APAP machine have Wi-Fi?

No, the Luna G3X APAP machine does not include Wi-Fi connectivity. Instead, it uses a cellular module to transmit therapy data. This allows healthcare providers to remotely monitor usage and treatment data without requiring a home Wi-Fi connection.

What is the Delay Off feature on the Luna G3X APAP?

The Delay Off feature allows the machine to continue running briefly after it is turned off. When the top button is pressed, the machine continues delivering air at a low pressure of about 3 cm H2O for up to 15 minutes to help clear moisture from the tubing and mask. A countdown timer appears on the display while this process runs.

Luna G3X Reviews

5.0
Rated 5.0 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 6 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
6 reviews
  • Jennifer S.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    6/22/26
    Luna G3X Auto CPAP machine

    Direction are fairly easy to understand and set up didn’t take long at all.

  • Richard P.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    6/10/26
    Very quite

    It hardly makes any noise.

  • Joshua C.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    5/25/26
    Excellent machine all around

    Terrific value. Small, quiet, easy to use, and super effective and a wide range of pressures. This is by far the best machine I've used yet. I wish it was a tiny biy smaller, but oh well.

  • Alan H.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    5/17/26
    Great machine

    It works great quite very user friendly.

  • Bruce G.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    5/13/26
    G3X

    Quiet and easy to use

  • Michael H.
    Verified Buyer
    Reviewing
    Luna G3X Auto CPAP Machine
    Rated 5 out of 5 stars
    4/29/26
    Works good

    Works good and allows me to sleep better. Its quiet as well.