Inogen One G3 Portable Oxygen Concentrator Review

Inogen One G3 Portable Oxygen Concentrator Review

Are you looking for Inogen G3 oxygen concentrator reviews to help you decide if it's the best portable oxygen concentrator for you? Lucky for you, we've got you covered!

With plenty of amazing portable oxygen concentrators today, it’s hard to choose the right one that would suit your needs. Perhaps you’re searching for Inogen G3 reviews and you wound up reading this article.

If you want to know more about this specific product, continue reading the article!

Bottom Line Up Front

The Inogen One G3 weighs 4.7 lbs with an 8-cell battery and 5.7 lbs with a 16-cell battery. This particular unit also includes a carry bag that you may use for convenience. That said, Inogen One G3 is perfect for traveling.

Curious about the specs of Inogen One G3? Keep reading.

What You'll Like

  • It has two battery options
  • Pulse-flow oxygen delivery
  • Sieve beds are replaceable
  • It's Federal Aviation Administration (FAA) approved
  • The LCD Screen has interactive features
  • Manufactured by Inogen, a multi-awarded company

What You Won't

  • No continuous flow option
  • A bit more expensive than others

What Is Inogen One G3 Portable Oxygen Concentrator?

The Inogen One G3 is the third generation of portable oxygen concentrators that Inogen offers in the global market. It is among the smallest and lightest POCs that provide a long-lasting battery and produces medical oxygen.

According to medical experts and some customer reviews, Inogen oxygen machines are one of the best oxygen concentrators available right now.

How Does An Inogen One G3 Portable Oxygen Concentrator Work?

Instead of the traditional models that use continuous flow oxygen systems, the Inogen One G3 uses the pulse flow oxygen system. It works perfectly for patients who want to maximize their mobility.

A large LCD screen displays your battery life and current flow setting. Press either the plus (+) or minus (-) button to change the current flow system. It will then be visible on the LCD screen of your device.

Inogen One G3 Portable Oxygen Concentrator Features

The Inogen One G3 device from Inogen is one of the best-selling portable oxygen concentrators. It is possible because it has features that make it stand out among its competitors.

Here's a comprehensive breakdown of the Inogen One G3 features for you:


From the Inogen At Home device, the most notable upgrades in the Inogen One G3's overall design include extended battery life and weight loss.

Size and Weight

The Inogen One G3 is about 45% smaller than its predecessor with a dimension of:

  • Height: 7.25"
  • Width: 3"
  • Depth: 8.75"

It weighs 4.7 lbs or 2.1 kg if you're using the 8-cell single battery. However, if you've opted to choose the 16-cell double battery option, it will weigh 5.7 lbs or 2.6kg.


The Inogen One G3 is a portable oxygen concentrator you can hold that doesn't require a rolling cart. You can even use it with one hand. Its small and lightweight design makes it the best choice for you if you travel a lot.

LCD Screen

Inogen One G3 is said to be the most interactive portable oxygen concentrator among its competitors. Rather than only checking for any visual indicator signals, the Inogen One G3 LCD screen already displays different essential parameters such as alarms, power status, remaining battery life, and flow setting.


Power (ON / OFF) Button

To turn it on, press "ON" once; press and hold for a second to turn it "OFF."

Audible Alarm Button

The audible alarm button is the bell button in your Inogen One G3 device. This button toggles the Inogen One G3's breath detection audible alert on and off via default mode and breath detection alert mode.

Note that when power is lost, the breath detection alert mode returns to default mode.

Flow Setting Control Buttons

The flow rate button is the plus (+) sign, while the flow rate button is the minus (-) sign. The controls are what you need to remember if you want to change the flow settings.

Display Backlight Button

The display blacklight is the lightbulb sign in your Inogen One G3. It automatically turns off after 10 seconds.


The alarms feature in Inogen One G3 are displayed easily and understandable while providing solutions to the problem. Aside from alert lights, the alarms are also audible.

Sound Level

With a noise level of 39 dBA, Inogen One G3 is considered barely noticeable. If you want to go somewhere quiet like the library or church, you wouldn't have a problem with its noise.


The batteries of Inogen One G3 are easier to replace, unlike its competitors. Additionally, the external battery is attached to the POC itself.

Battery Life

One of the things people look at first when buying any device is its battery life. The Inogen One G3 has two batteries:

Single Battery

The standard 8-cell single battery can last up to 5 hours. This battery life is perfect if you're only out for some quick errands.

Double Battery

The optional 16-cell double battery, on the other hand, can last up to 10 hours. This battery, however, makes your machine weigh 1.1 lbs heavier. This battery life is ideal if you're out for adventures like traveling for long hours.

Charging Time

The charging time for the batteries before it comes back to their fully depleted state is:

  • 2-4 hours (Single)
  • 4-8 hours (Double)

Power Sources

Inogen One G3 is compatible with three sources:

Rechargeable Battery

Rechargeable batteries are ideal for you if you don't want to plug your Inogen One G3 often. For example, you're on a road trip. No one wants to be bothered plugging the device into another source outlet.

AC Power Supply

If you're on vacation and happen to get your Inogen One G3's battery to run low, don't worry. This AC power supply allows you to recharge your battery in any wall outlet near you because of its 110 v power cord.

DC Power Supply

The DC power supply is convenient for you if you're in a car. It allows you to recharge your batteries in your vehicle's battery with its 12 v power cord.

Just make sure that your vehicle is on to prevent any danger and prevent you from draining the battery in your car.

Power Consumption

We've summarized the power consumption in each flow setting for you in this table:

Power Consumption

8-Cell Battery

16-Cell Battery

Setting 1


4.5 hours average

9.5 hours average

Setting 2


4 hours average

8.5 hours average

Setting 3


3 hours average

6 hours average

Setting 4


2 hours average

4 hours average

Setting 5


1.7 hours average

3.3 hours average

Flow Type

Unlike other portable oxygen concentrators, the Inogen One G3 does not provide a continuous flow. However, it can provide 1-5 pulse flow settings. It can accommodate almost any oxygen patient who can use a pulse flow.

Sieve Beds

The option to replace sieve beds made Inogen stand out among its competitors. Most POCs' sieve beds are attached inside the machine, making them hard to replace.

Warm-Up Time

The Inogen One G3 has two minutes of warm-up time.

Oxygen Concentration

The oxygen concentration in this device is approximately 90% in all settings.


Here are the Inogen One G3’s oxygen output capacity per-flow setting:

Flow Setting

Oxygen Output (milliliter per minute)


210 ml/min


420 ml/min




840 ml/min


1050 ml/min


The Inogen One G3 Gross Particle Filters are only compatible with the unit with a flow setting of 1-5. The primary function of this is to provide you with clean air. 

Available Accessories

Here are the available accessories you can get with this device:

Inogen One G3 Backpack

The G3 has two shoulder straps, a waist belt if you want to wrap it around your stomach, and a carrying case.

Inogen One G3 Carry Bag

The main reason for creating Inogen One G3 carry bags is to make your life easier by prolonging the life of your Inogen One G3 portable oxygen concentrator.

G3 Double Battery

This accessory allows you to have your Inogen One G3 battery life doubled. Note that you can purchase extra batteries, especially if you see yourself charging your unit too often.

Having extra batteries comes in handy when traveling for long hours.

External Battery Charger

This optional charger allows you to charge your batteries when not connected to your POC. Your single battery takes about 3 hours to charge entirely while about 6 hours to charge the double battery fully.

FAA Approval

The Inogen One G3 is FAA-approved, which means it is safe to use during airline travel in the United States. Additionally, the patients can use the device on land transportation like buses and most cruise ships.

International Approvals

  • US Food and Drug Administration (FDA)
  • Federal Aviation Administration (FAA)
  • European Conformity (CE)
  • International Organization for Standardization (ISO)


Up to 10,000 ft or 3,048 m.


Inogen offers a lifetime warranty for their concentrators. Along with this, licensed medical professionals such as respiratory therapists recommend the company's products.

Manufacturer Country

The United States of America (USA)

Available Inogen One G3 Portable Oxygen Concentrator Discount

The Inogen One G3 is currently $2,995 from $3,995. You can save 25% if you buy it now.

Inogen One G3 Portable Oxygen Concentrator Alternatives

If you're still undecided whether the Inogen One G3 Portable Oxygen Concentration suits your needs or not, here are the top 3 alternatives you might want to consider buying instead:

1. Inogen One G5 Portable Oxygen Concentrator

Inogen offers the best portable oxygen concentrators on the market today. The Inogen One G5 portable oxygen concentrator (POC) is currently the latest of Inogen's POC series. It introduces an Inogen Connect mobile app that allows you to monitor your Inogen One G3 device closely.

Its features include a lightweight body of only 4.7 lbs and highly long-lasting battery life with up to 6.5 hours with a single battery and 13 hours with a double battery. Additionally, the Inogen One G5 can go up to a flow setting of 6.

2. SeQual Eclipse 5

If you aim to have a portable oxygen concentrator that uses continuous flow, the SeQual Eclipse 5 might be what you're looking for. It has a continuous flow setting of 1-3 and a pulse flow setting of 1-9. You don't have to worry about the battery running out because it also offers additional batteries.

3. Respironics SimplyGo Portable Oxygen Concentrator

Respironics SimplyGo Portable Oxygen Concentrator offers both pulse flow settings and continuous settings. This device weighs 10 lbs, making it the lightest unit that provides a continuous flow setting.

FAQs About Inogen One G3 Portable Oxygen Concentrator

How long does an Inogen G3 last?

The Inogen One G3 device lasts depending on the batteries you prefer. Remember that you can always purchase extra batteries and chargers to keep your Inogen One G3 working.

Can the Inogen One G3 be used at night?

Yes. Thanks to the Intelligent Delivery Technology feature, you can use the Inogen One G3 while sleeping. It monitors your breath rate and automatically increases or decreases the amount of oxygen per bolus dose following your breath rate and oxygen setting.

What is the difference between Inogen G3 and G5?

The Inogen One G5 has additional features unavailable on the Inogen One G3. The table below is the side-by-side comparison between Inogen G3 and G5.

Inogen One G3

Inogen One G5


4.9 lbs

4.7 lbs


Width: 8.75”
Height: 8.25”

Depth: 3”

Width: 7.19”

Height: 8.15”

Depth:  3.26”

Battery Duration

A single battery is up to 4 hours

A double battery is up to 8 hours

A single battery is up to 6.5 hours

A double battery is up to 13 hours

Battery Charge Time

A single battery is up to 4 hours

A double battery is up to 8 hours

A single battery is up to 4.5 hours

A double battery is up to 9 hours

Noise Level

Around 39 decibels

Around 38 decibels

Oxygen Settings

Pulse dose is 1 to 5

Pulse dose is 1 to 6

Maximum Oxygen Output

1050 ml/min

1260 ml/min

Does Inogen One G3 have continuous flow?

No. The Inogen One G3 offers pulse flow instead. Pulse flow is for patients who have high activity levels. For example: being involved in sports or enjoying morning jogs. On the other hand, continuous flow portable oxygen concentrators are best for patients who do not participate in active affairs.

Is Inogen G3 The Best Portable Concentrator For You?

Inogen has different units you can choose from — depending on your preference and customer reviews — and one of their best-selling products is the Inogen One G3.

With its user-friendly interface, the Inogen One G3 Portable Oxygen Concentrator is easy to operate, even if you're not tech-savvy. Its lightweight feature makes it ideal for people who need oxygen therapy but enjoy traveling either by land, sea, or even the skies.

If you want to know more about Inogen One G3 concentrator reviews, don’t hesitate to visit us at SpryLyfe. You can also call us at (800) 314-8225 or send an email at
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