Luna G3X Auto CPAP Machine

Free CPAP Success course with purchase

Luna G3X Auto CPAP Machine

5.04 reviews
$ 873

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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

The G3X is the latest PAP device from Luna and the first standard-size device that doesn’t use polyurethane sound-dampening foam available in the U.S. The no-foam design makes for quieter operation without the safety concerns that emerged after the Phillips recall.

The key feature of the G3X is that it uses SMART technology to adapt to patients’ breathing and respond to air leaks in real time without disrupting their sleep. In testing, the G3X demonstrated 100% accuracy in detecting central apneas, hypopneas, and Cheyne-Stokes respiration.

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.
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.

What’s in the Box

  • Luna G3X Auto CPAP machine
  • Humidifier tub
  • Heated tubing (if that model is selected)
  • Disposable and reusable filters
  • SD card
  • Power cord and adapter
  • Carrying case

Who It’s Best For

  • CPAP users concerned about foam-related safety risks
  • Those who want a longer warranty period
  • Users who want automatic pressure adjustment
  • People sensitive to pressure adjustments

How It Works

  1. In Smart A mode, the machine responds to detected events by automatically adjusting the air pressure level.
  2. The built-in humidifier and optional heated tubing add moisture to the air.
  3. The tubing delivers this airflow through the mask to help prevent airway collapse and support steady breathing. 
  4. Patients control the operation and settings using the touchscreen display menu.
  5. The React Health Connect app lets you see data and communicate with providers.

Who It’s Not Ideal For

  • Users who require BiPAP or ASV therapy
  • People who are not tech savvy
  • Those looking for a less expensive model

Meet Your Luna G3X

  1. 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. 
  2. Ramp Feature: This gradually increases the pressure over a preset time (0 to 60 minutes) to help you fall asleep more easily. 
  3. Heated Tubing and Pre-Heat Humidifier: These features add comfort to patient therapy by gently warming and moistening the air, while helping prevent rainout (condensation in the tube).
  4. Touchscreen Display: There’s an easy-to-read, full-color screen and intuitive interface with a bedside clock and resupply reminders.
  5. React Health Connect Platform: This data sharing software platform facilitates care management and communication between patient and provider via mobile app.

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.

Product Details

Machine Dimensions
10.4” x 5.7” x 4.5”
Machine Weight
3.75 lbs.
Sound Level
< 28 dB
Pressure Range
4 to 20 cm H20
Humidification Available
yes
Humidification Type
heated humidifier
Exhalation Relief
yes
Ramp Range
0 to 60 minutes
FAA Compliant
yes
Max Altitude
7,545 ft
Auto Altitude Adjustment
yes
Compliance Data
yes
Advanced Data
yes
Phone/Web App Available
yes
Auto Start
yes
Voltage Requirements
  • 100 V to 240 V , 50 Hz/60 Hz, 2 A Max
Download User Guide

Frequently asked questions

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.

5.0
Rated 5.0 out of 5 stars
Based on 4 reviews
Total 5 star reviews: 4 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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4 reviews
  • 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.

    Was this helpful?
  • 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.

    Was this helpful?
  • 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

    Was this helpful?
  • 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.

    Was this helpful?