G4 Systems & Accessories

Introducing the next innovation to portable oxygen delivery: The Inogen One G4, capable of full 24/7 oxygen delivery in an unbelievably small package! Offering 1-3 flow settings, the Inogen One G4 is one of the smallest, lightest and quietest units available to the oxygen user today.

The Inogen One G4 System

The Inogen One G4 is the smallest portable oxygen concentrator we offer, weighing just 2.8 pounds. Because it is so incredibly portable and lightweight, the Inogen One G4 is easy to take with you wherever you go, allowing you to get oxygen anytime, anywhere, without disrupting your life. Our smallest portable oxygen concentrator is only about the size of a large coffee cup, measuring 7.2 inches tall, 5.91 inches long and 2.68 inches wide, so you can pop it in its carrying case and easily sling it over your shoulder. Whether you use the Inogen One G4 at home or on the go, you will discover how convenient and transportable it is, so you can live a full and active life while getting the oxygen therapy you need.

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Inogen Connect Included Inogen One G4 System

INOGEN ONE G4 System

3-Year Warranty System

MSRP: $2,495 SALE: $2,295

System Includes:

  • One single battery
  • Concentrator
  • Standard 3-year warranty
  • AC/DC power supplies
  • Carry bag, user manual
  • Meets FAA requirements
  • Intelligent Delivery Technology®
  • Bluetooth System Inogen Connect App
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G4 Accessories

From backpacks to backup batteries, find the gear you need to carry and maintain your oxygen concentrator with greater comfort and peace of mind.

G4 Replacement Column Pair

$99

Inogen One G4 Replacement Columns
G4 Replacement Column Pair

$99

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External Battery Charger (G4)

$285

Inogen One G4 Battery Charger
External Battery Charger (G4)

$285

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AC Power Supply (G4)

$79

Inogen One G4 AC Power Supply
AC Power Supply (G4)

$79

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Inogen One G4 Particle Filter

$11.95

Inogen One G4 Replacement Particle Filter
Inogen One G4 Particle Filter

$11.95

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G4 Carry Bag

$24.95

G4 Carry Bag
G4 Carry Bag

$24.95

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Carry Strap (G4)

$13.95

Inogen One G4 Carry Strap
Carry Strap (G4)

$13.95

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DC Power Cable

$65

Inogen One G3 and G4 DC Power Cable
DC Power Cable

$65

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G4 Backpack

$100

Inogen One G4 Backpack
G4 Backpack

$100

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G4 Hip Bag

$59

Front View of the Inogen One G4 Hip Bag
G4 Hip Bag

$59

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Advantages of Choosing the Smallest Portable Oxygen Concentrator

When you choose the Inogen One G4 for your oxygen therapy, you can enjoy a number of advantages unique to the smallest portable oxygen concentrator we make. At the top of the list is likely the minimal size and weight of our littlest portable oxygen concentrator, which makes it simple to bring with you out and about. And as long as you have power, the Inogen One G4 provides endless oxygen, because it pulls from, purifies and concentrates the air around you. It comes with a single battery that can be recharged from any AC or DC power source, and double batteries or additional batteries are available for backup. 

The Inogen One G4 is incredibly quiet, allowing you to maintain conversation and hear what is going on around you while receiving your oxygen treatment. Inogen portable oxygen concentrators were developed specifically to enhance your life rather than impede it, and this model especially allows for an active, rich lifestyle without being held back by your oxygen therapy. Last, but certainly not least, the Inogen One G4 incorporates modern technology with the Inogen Connect App and Bluetooth System, both of which allow you to easily monitor your Inogen One G4 and your oxygen use with any supported device. You can check your battery, monitor the life of your portable oxygen concentrator’s parts and accessories, get the latest software updates, access FAQs and troubleshoot any issues you may experience. 

The Inogen One G4 System Freedom Packages

To enjoy extended independence and worry-free use of Inogen’s smallest portable oxygen concentrator, try one of our Inogen One G4 Freedom Packages. Each package provides you with extra batteries, plus a Lifetime Warranty. The three different packages offer a different combination of extra single or double batteries, allowing you to bring an additional charged power source along with you when you travel. This gives you extended freedom and mobility, so you have more time before you need to plug into an AC or DC power source to recharge a spent battery. Moreover, the Lifetime Warranty gives you the confidence of knowing that, should you experience any issues with your Inogen One G4, Inogen has you covered. Your oxygen therapy should not be an extra source of stress or worry for you. Purchasing one of our Freedom Packages allows you to free yourself from any lingering concerns. 

Why Choose Inogen?

Wondering why you should choose Inogen portable oxygen concentrators? The Inogen One G4 is not only one of the smallest portable oxygen concentrators on the market, but it also receives stellar reviews. Inogen was founded on the idea that oxygen therapy should help improve your life, not hinder it, so the founders of the company worked hard to create portable oxygen concentrators that help you live as normally as possible. Inogen believes that we have achieved that goal, and the Inogen One G4 reviews support our conviction. Time and again, users tell us that the Inogen One G4 has improved their freedom, independence and mobility, allowing them to live full and active lives, even while receiving oxygen treatments. We are incredibly proud of the Inogen One G4 reviews, and after reading them, we think you will be able to see why choosing Inogen is an excellent choice for your quality of life.

Explore the Customer Stories section of our website to see videos and read inspiring stories about how our smallest portable oxygen concentrators have helped provide customers with newfound freedom and improved their quality of life. We are confident that the Inogen One G4 is an ideal solution for your oxygen therapy at home, away and for travel, 24/7. Receive your oxygen therapy on your terms and enjoy oxygen anytime, anywhere.


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