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Inogen One G2 Portable Oxygen Concentrator

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Inogen One G2 & G3 Comparison
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Inogen One G2
Inogen One G2 from OxiMedical Respiratory
Inogen One G3

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Portable Weight
8 lbs 4.9 lbs
Size (in inches)
9.5 high
10.7 wide
3.9 deep
7.25 high
8.75 wide
3 deep
Flow Settings
Battery Duration Continuous Flow
Pulse Flow Only - No Continuous Flow
Battery Duration Pulse Settings 1-2-3
(with double battery)
1 = 8 hrs
2 = 7-8 hrs
3 = 6-7 hrs
(with double battery)
1 = 8 hrs
2 = 7-8 hrs
3 = 6-7 hrs
Sound Levels
38 dBA 42 dBA
Will the unit run in the car?
Yes, all
pulse settings
Yes, all
pulse settings
Will the battery charge in the car?
Yes Yes
FAA Airline Approved
Yes Yes
Factory Warranty
3 Years 3 years

Inogen One G2 Basic System

Inogen One G3 Basic Battery System

Inogen One G2 Freedom System

Inogen One G3 Freedom Battery System

Inogen One G2 Traveler's System

Inogen One G3 Traveler's Battery System
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About the Inogen One G2


Inogen One FAQs

Inogen One G2 Brochure from
Inogen G2 Brochure
Inogen One G2 Manual from
Inogen G2 Manual
The new Inogen One G2 delivers the independence of the original Inogen One portable concentrator, but the new model is lighter, smaller, and generates more oxygen with increased battery life. The Inogen portable oxygen concentrator is even tiny enough to fit in your hand. This means that there are no more tanks to refill and you’ll never have to run out of oxygen.
  • 25% Lighter
  • 40% Smaller
  • 20% More Oxygen
  • Authorized by FAA onboard aircraft

It weighs less than your cat.

No more worries about running out of oxygen. No more relying on other people for your oxygen supply. And no more deliveries.

The INOGEN ONE G2 is the first oxygen system ever made to provide an optimal level of freedom for the oxygen user of today. With the INOGEN ONE G2, you don’t need to maintain separate equipment for the home and travel. Best of all, you have no gas or liquid tanks to worry about, because the equipment gets oxygen from the air. Your INOGEN ONE G2 never runs out of oxygen.

The INOGEN ONE G2 is designed to make life easier. It is lightweight enough to carry over your shoulder, and it includes a cart that rolls behind you when you’re out and about. We call it a “polite companion”... and since it’s as quiet as whisper, most people don’t notice it’s running.

It's smaller than your coffee maker.

The INOGEN ONE G2 can fit almost anywhere. Now you’ll have space in that room in your home that used to hold a noisy concentrator, oxygen tanks, or a bulky liquid oxygen reservoir. Your INOGEN ONE G2 sits discreetly on the floor, behind a chair, beside the bed, or even over your shoulder. Any way you want it, all your oxygen needs can be accommodated with just one little device—home and away, day and night.

Technology makes the INOGEN ONE G2 lighter and smaller than other models, and it makes it easier to operate. Just push a few buttons. You don’t have to worry about switching regulators or dealing with liquid oxygen freeze. Once you’ve tried it, you’ll ask yourself how anyone could use anything else. Embrace the versatility and simplicity of this wonderful unit and see how it makes life easier.

It can go wherever you want.

You can go home when you want, not whenever the oxygen gauge says you must. Giving you back your freedom is a huge part of the INOGEN ONE G2’s appeal.

You can power the unit with a wall outlet, car DC outlet, or keep it running for hours with its included battery. So go jump in the car to go on an errand or take a trip over the weekend to visit your family. You can come and go as you wish without having to worry about switching to another piece of equipment. Or you can take that long road trip you thought you’d never get the chance to take.

The INOGEN ONE G2 is designed to follow you everywhere, whether around town, on a cruise, on the road, or up in the air. Where you travel is now your choice!


Speaking of air travel, a lot of airlines now permit you to bring along and operate the INOGEN ONE G2 when you fly. You can take along your oxygen, avoiding the bother of finding oxygen at the airport as well as the expense of using airport-supplied oxygen during your flight. Visit for a list of airlines that currently allow the INOGEN ONE.

Can I take the Inogen One G2 onboard commercial aircraft?
Yes. The Inogen portable oxygen concentrator has been approved for use on a wide range of commercial aircraft. For a list of airlines that accept the Inogen One, please click here
How long does the Inogen One battery last?
A completely charged battery can last as long as four hours. If the Inogen One G2 is set to a higher flow setting, like 4 or 5, then the battery will last closer to 3 hours.  If set at the lower setting of 1 or 2, it will last closer to 4 hours. The battery will charge by plugging it into a power source, whether a nearby electrical outlet or the car’s cigarette lighter (using a mobile power charger).
Is the Inogen One G2 a pulse dose unit? Can I use it overnight?
Yes, the Inogen One G2 is a pulse dose unit, but we have developed new technology. The Inogen One G2 is intended to be used 24/7, even at night. It has been clinically proven to provide all the oxygen required for the majority of ambulatory patients during all types of daily activities and sleep.
What is included in the Inogen One G2 system?
The Inogen One G2 system includes the Inogen One G2 Portable Oxygen Concentrator, Inogen One G2 12-Cell Lithium Ion Battery, AC home power supply, DC car power supply, Cart and Carry Bag, a nasal cannula, and instruction materials.  The Inogen One G2 System comes with everything you need to become independent.

Understanding Your Oxygen Order Before You Buy a POC

Oxygen is prescribed by a control of the flow rate, i.e., liter flow. The common 1-3 liters per minute continuous flow is not appropriate in all situations. This could be too much or not enough.

Precision in the use of the proper flow, or amount of oxygen, is necessary. The flow of oxygen should achieve the normal amount of oxygen in your blood, expressed as a saturation above 90%.*

What to Know Before You Buy a POC

Portable Oxygen Concentrators manufacture oxygen, they do not store oxygen.

Portable concentrators produce enough oxygen per minute, which allows for an acceptable dose of oxygen every breath you take.

Portable concentrators that weigh 2 to 8 pounds only deliver oxygen on demand pulse flow.

Manufacturers of these devices place arbitrary numbers such as 1-3 or 1-6 to refer to the size of the pulse flow of oxygen and are not the same as liter flow. These settings are considered liter flow equivalents. Also, these devices do not all produce the same amount of oxygen at a given setting.

Who to Ask Before You Buy a POC

Our respiratory team of licensed nurses and respiratory therapists will take the time necessary to choose the right portable for your respiratory needs.

Our 14-day trial period on all portable oxygen concentrators assures your oxygen needs are met.

We understand that finding a portable oxygen concentrator that accommodates both lifestyle and oxygen needs can be a difficult process for both you and your loved one.

Why Self-Monitor Before You Buy a POC

Many people commonly check their blood pressure, blood sugar or air flow rate (peak flow) at home.

We can measure temperature and weight whenever we have the need.

We can now measure our blood oxygen and pulse rate at home as well, using a simple pulse oximeter.

A common word used when measuring oxygen is titration .

Titrating is the measurement of what your oxygen equipment and setting is achieving in the arterial blood. It’s the blood that energizes the tissue.

By taking your own measurements, you can adjust your oxygen setting for any situation and with any portable oxygen concentrator.

* This is a general statement. Your physician must prescribe your specific target saturation level.

  Inogen One Product Specifications     Related Products



Length: 10.7"
Width: 3.9"
Height including handle: 9.5"

Weight 7.25 pounds
(includes 12-cell battery)
Oxygen Concentration 90% ± 3% at all settings
Oxygen Flow Pulse dose delivery system
Five flow settings from 1-6

Amount of oxygen per breath at 20 breaths/minute:
Setting 1 = 10.5 mL
Setting 2 = 21 mL
Setting 3 = 31.5 mL
Setting 4 = 42 mL
Setting 5 = 52.5 mL
Setting 6 = 63 mL
OCD Trigger Sensitivity

0.12 cm water (12 Pa)

Power Sensing AC Power Supply 100-240V, 50-60Hz
(auto sensing to allow world wide use)
DC Power: for mobile use in car/airplane
Battery Duration (12-cell battery): 3.5 to 4 hours at setting 2
Recharge approximately 4 hours with AC or DC power

Duration (24-cell battery): 7 to 8 hours at setting 2
Recharge approximately 8 hours with AC or DC power
Noise 38 Decib e ls (at Setting 2)
Environmental Ranges Temperature: 41° to 104° F 
                   (5° to 40° C)
Humidity: 0% to 95%, non-condensing
Environment Ranges
Intended for Storage
Temperature: -4° to 104° F (-20° to 60° C)
Humidity: 0% to 95%, non-condensing
Store in a dry environment
Warranty 3 year limited warranty
Transportation Keep dry, Handle With Care






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