3B Medical Luna G3 CPAP Machine Review 

3B Medical Luna G3 CPAP Machine Review 

The 3B Medical Luna G3 CPAP Machine is powerful, effective, and user-friendly. The lighter design and added comfort features of the 3B Medical Luna G3 make this CPAP machine the ideal choice for anyone just starting CPAP therapy or switching from a different CPAP machine. This device is beneficial for users who are normally prone to congestion during therapy, as therapy begins at a lower level and then increases to the user's prescribed settings.

The Luna G3 also ensures a quiet and peaceful night's sleep for both a user and their bed partner. That's because of its efficient design, resulting in a better night's sleep. Even at the highest pressure settings, this machine operates at 26 dBa, which is quieter than a whisper. This CPAP machine is a great option for both new users and those who have been on therapy for a while but are looking for a new machine.

The Luna G3 is the successor of the Luna 2 that many users seem to think was too heavy, bulky, and did not include wireless connectivity. So, 3B Medical made the G3 which features a more lightweight and sleek design, able to more easily transported, and also includes a celluar modem for help with data sharing. Keep reading to learn more about the Luna G3 CPAP machine.

Key Features of 3B Medical Luna G3 CPAP 

  • Integrated heated tubing and modem for a smaller footprint. This lightweight design is perfect to fit on a bed side table.
  • Pre-heat feature, which gives users the option to warm up the water in the humidifier chamber before they are ready for therapy.
  • Lightweight—only 3.75 lbs! This is ideal for users who bring their CPAP machine from place to place as it is easy and lightweight to carry.
  • AutoRamp feature, which allows users to receive a lower pressure while falling asleep. Once the device detects the patient is asleep, the machine automatically "ramps up" to a user's prescribed settings.
  • Ultra-modern design with a user-friendly interface, easy to scroll through the navigation and settings.
  • Exhalation relief for adapting to your breathing patterns, giving users a more comfortable experience while using this machine.
  • Data transfer for sleep data, so both users and their sleep doctor can review their sleep data and make changes, if necessary.
  • Auto stop and start, with the device detecting when a user has begun and ended therpay

3B Medical Luna G3 CPAP - Performance

Level of the Noise

When the pressure of the Luna G3 machine is at 10cm H2O then it generates a noise level of around 26 decibels rendering it quieter than other machines that have an average noise level of 30 decibels. A CPAP machine that operates at 26 dBa is about the sound of a whisper, ensuring a peaceful sleeping environment for the user and their bed partner.

Easy Usability

The LCD of the machines makes it easier to read and more user-friendly. When you are not using the machine, you can see the time, room temperature, and humidity level. After viewing your data you can adjust the preheat and ramp mode settings using the interface. With this user-friendly screen, patients are able to easily scroll their settings to customize their treatment to their liking.


This machine is not as portable as the other machines on the market, which are mainly for traveling, as it is not FAA-approved for in-flight use. However, the machine weighs less than 4 pounds, so you can relocate it easily during the night or carry it from room to room. Before packing it, you can disassemble the humidifier chamber as well for a less bulky solution.

Pressure Settings

The Luna G3 has various pressure levels that can be set between 4 and 20 cm with a 0.5 cm increment on each level. This is the standard range for all CPAP machines. The Luna G3 can be set on a fixed pressure depending on the prescribed pressure setting suggested by your physician. 

Humidity Control Settings

The AutoHumidity control feature of the 3B Luna G3 can be used to adjust humidity levels based on atmospheric humidity. This also helps in providing the perfect moisture level for CPAP therapy and prevents rainout. The humidified water on the heated tubes provides a consistent temperature which helps avoid any water droplet build-up in the CPAP mask.

Along with AutoHumidity, the Luna G3 also includes a pre-heat option to warm up the water in the humidifier chamber before therapy. This allows the humidity to be ready to go when a user is ready to start treatment. This eliminates the time a user would have to wait for the water to be warmed up as it can be preheated while a user is getting ready for bed.

Air Temperature Control

Before delivering the air the heated humidifier warms it and maintains a consistent temperature in the tubing connected to the mask. Patients breathe more easily with warm air.


The Luna G3 is compatible with all CPAP masks from various manufacturers including Resmed, Philips, and Fisher & Paykel. Moreover, you can also use the machine with a full-face, nasal, or nasal pillow mask with adaptable connecting tubes. To find the best mask solution for you, search The CPAP Shop online or call us at 866-414-9700 today!


The Luna G3 requires regular cleaning of the tubing and humidifier. Other accessories and the CPAP mask should also be cleaned regularly using warm water and mild soap. The filters of the 3B Luna G3 require replacement every 6 months or sooner. Proper maintenance and cleaning will help ensure all parts of a patient's CPAP therapy are performing at their best. Also, caring for all of the CPAP equipment will make them last longer.

Specifications of 3B Medical Luna G3 CPAP 

  • Machine Pressure: 4 to 20 cmH2O (in 0.5 cmH2O increments) 
  • Sound Level: 26 dBA 
  • Dimensions - Machine with Humidifier: (L x W x H): 265 mm × 145 mm × 114 mm 
  • Weight - Machine with Humidifier: 3.75lbs 
  • Warranty Term: 2 Year 
  • Ramp: Yes 
  • Heated Hose Option: Yes 
  • Battery Option: Yes 

Power Consumption of 3B Medical Luna G3 CPAP 

While the 3B Medical Luna G3 is not DC-capable, you have AC power and the option for a battery. The battery allows you to travel with the 3B Medical Luna G3 or use it where no power resource is available. At home, the AC adapter works perfectly to ensure an adequate power supply,  

The Pros and Cons of the 3B Medical Luna G3 CPAP 

Lightweight DeviceNo DC Power
Offers Humidity ControlNot FAA-Approved
Include Pre-Heat OptionNo Leak Compensation

3B Medical Luna G3 CPAP - Warranty  

The Luna G3 is available with a two-year warranty from the manufacturer for performance defects. The warranty protection ensures the auto CPAP's reliable operation for a reasonable use period.  

What's Included If I Buy the 3B Medical Luna G3?

The following items are included when you purchase the 3B Medical Luna G3 CPAP Machine at The CPAP Shop:

  • 3B Medical Luna G3 CPAP Machine
  • Heated Tubing
  • Filter
  • Power Supply and Cable
  • User Manual

Where Can I Buy the 3B Medical Luna G3 CPAP Machine? 

You can buy all 3B Medical CPAP machines as well as other CPAP machine brands in our Brick-and-Mortar store at 159 Cooper Rd, West Berlin, NJ. You can also buy this machine from the comfort of your home online at The CPAP Shop. Our knowledgeable staff can answer all your questions about the Luna G3 CPAP machine.  Give us a call at 866-414-9700

Chris Vasta

Chris Vasta is the president of The CPAP Shop and an expert in sleep and respiratory therapy. He often provides insights on product design and functionality on various manufacturers’ prototypes and is frequently tapped to provide reviews on new releases.