Inogen One G5 Portable Concentrator Review

Introducing the newest machine from the awarding winning line of Inogen portable concentrators; the Inogen One G5. The Inogen G5 is a robust and versatile concentrator that provides 1 to 6 flow settings in a lightweight design weighing under 5 pounds. Utilizing Intelligent Delivery Technology, it is capable of 24/7 oxygen delivery with oxygen production of 1260 ml. It also features a long battery life, access to Inogen Connect, a large and user-friendly LCD screen, and quiet operation. The Inogen One G5 is a step forward in oxygen therapy innovation and is the ideal portable oxygen concentrator for any setting.

(20 customer reviews)
Product is rated as #10 in category Portable Oxygen Concentrators
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Inogen G5 Product Review

Inogen has been breaking ground for nearly twenty years by introducing cutting-edge, high-quality oxygen delivery technology that has helped save the lives of numerous patients with lung conditions around the world.

The Inogen One G5 is the most recent member of Inogen’s user-friendly portable oxygen concentrator series. The Inogen One G5 appears to be a “one-size-fits-all” portable oxygen concentrator, with increased functionality built on the foundations of the Inogen One G3 and Inogen One G4 to fulfill your supplemental oxygen needs. In this review, I’ll go through its features, accessories, perks, and my final thoughts on this new portable model.


Why my Input matters

My assessment of this product is based on publicly accessible information from Inogen, and 5+ years of experience as a certified medical doctor working in acute care hospitals, and adult and neonatal intensive care units. My expertise with adult respiratory medicine has exposed me to a variety of obstacles and situations related to the use of oxygen treatment in both the hospital and at home. I’ve worked with various oxygen concentrators – stationary and portable, and provided prescriptions based on my experience and patient feedback.


What is New in the Inogen G5?: Its Features

The Inogen G5 has two major improvements: The flow setting capacity and longer battery life. Inogen appears to have focused these updates in order to improve the user’s capacity to acquire more oxygen and extend the machine’s overall life while on the go. Both of these enhancements will give the user additional flexibility in terms of being able to undertake more physical activity without having to constantly change equipment. These additions are in line with Inogen’s objective to help people who use supplemental oxygen become more independent. So, I would begin with them.



While the Inogen One G3’s pulse flow settings can reach up to five levels and the Inogen One G4’s can reach up to three levels, the Inogen One G5 can reach up to six flow settings.  This makes it one of the ruling oxygen concentrators available by Inogen (if not the best); unparalleled by their stationary oxygen device. While users on low oxygen flow may not see this as a significant benefit in the short term, the truth is that having more options is always preferable, especially as ailments worsen or conditions change. A person with a chronic lung condition, for example, may be perfectly suited to a three-level flow setting, but the need for oxygenation may increase to a six while exercising.

No continuous oxygen flow settings: This might be an inaccurate criticism of the G5 amongst other portable oxygen concentrator models because portable oxygen devices rely on pulse oxygen flow rather than continuous flow. There are a variety of reasons why this continuous flow setting isn’t available in portable concentrators, the most important of which being power consumption, but it’s still a drawback because it excludes a huge segment of the market that requires continuous oxygen supply.



How many hours does an Inogen G5 last?

Having to be dependent on portable oxygen concentrators also comes with the worry of how long the single battery would be able to support breathing before a charge is required. Battery life of 5-6 hours would certainly not do much with the day-to-day activities of an average person, but the new Inogen One G5 comes with a whopping 13 hours of extended battery life with a double battery. So, no more frequent checks, charges, or even the additional mental burden. It is the perfect fit for an active lifestyle whilst on supplemental oxygen therapy. An external battery charger on a trip makes this possible. It’d enable you charge multiple single and double batteries.



Carrying heavy oxygen concentrators around can be inconvenient and hinder your social interactions. This Inogen portable oxygen concentrator weighs only five pounds and measures 7.19 inches wide, 3.26 inches deep, and 8.15 inches tall. For some, it may be too heavy, but it does give a more stylish and less conspicuous look in public.



The G5 is already a terrific portable device to carry about all day, thanks to its weight and the amount of battery life it provides with the double battery. Because it is also FAA approved (FAA – Federal Aviation Administration), it is a good choice for people searching for an oxygen concentrator that they can carry with them when they travel.



The device also has a noise level of about 39 decibels. Meaning it could conveniently be set up in a public place without drawing unwanted attention whilst receiving medical grade oxygen.




The new Inogen One G5 is a novel pulse dosage oxygen concentrator that aids patients in fast becoming used to oxygen therapy. It is powered by the Intelligent Oxygen Delivery technology.

The intelligent technology in the inogen oxygen concentrators helps to manage oxygen levels by detecting the patients’ breathing rate at a precise level. When the user engages in any type of physical activity, the device recognizes it and begins administering precise and brief bursts of oxygen to match the user’s oxygen demands. During sleep or rest, the medical unit delivers larger, slower boluses of oxygen in accordance with the user’s natural breathing rhythm. This allows the user to receive personalized oxygen therapy without having to do anything. Furthermore, the user does not require two separate units, one for use during the day and the other for usage at night, because the medical unit is designed to work 24 hours a day, seven days a week. Now that’s awesome!



The Inogen Connect mobile app makes use of Bluetooth technology to effortlessly report and monitor battery life, column life, and consumption. Because oxygen concentrators are such a large investment, the Inogen Connect app helps you to properly manage your system for optimal performance. If you’re generally highly active, knowing how much battery you have left and when it’s time to charge the concentrator might give you peace of mind.



Inogen offers Freedom Bundles to let you live your life as normally as possible, whether or not you’re utilizing oxygen therapy. The Freedom Bundle is the greatest deal if you want to use your oxygen concentrator for a long time and want it to be portable and stationary. The G5 system has three distinct freedom bundles to pick from, each with a different number of batteries. An oxygen specialist can help you decide.



Inogen offers a comprehensive way to add more items to the purchase of the device. Available add-on items may include:

  • Single battery
  • Double battery
  • External charger (car charger inclusive)
  • AC power supply
  • DC power cord
  • Backpack
  • Carrying bag


Is there a warranty?

The Inogen One G5 portable concentrator comes with a 3-year warranty.


Final Thoughts: Is Inogen One G5 good?

Inogen really outdid themselves with the new modifications into the Inogen One G5. It is undoubtedly a best-in-class device in practically every way. Being dependent on supplementary oxygen may not be the life you dreamed of, but with the new G5, you can take a trip or simply go outside for a walk unbothered. All your needs are met with this device, and it offers the best bang for your money.

20 reviews for Inogen One G5 Portable Concentrator Review

4.8 out of 5
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  1. Lymm

    I was really impressed with Nick’s knowledge and professionalism on helping obtain my Inogen G5. He worked with my doctor’s office on getting the authorization. Thank you for a great product and purchase experience!

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  2. Ron

    Our insurance would pay for tanks of o2 but not a concentrator. After a lot of research we bought the inogen g5 . Worth every penny .Its light ,easy to use ,long battery life ,and very quiet. Your customer service is a real pleasure to deal with.
    Thanks again

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  3. Slim

    Have had my G-5 for about 8 months. Had an Inogen G-3 that I traded in. Am very well pleased with this concentrator! Has adequate Oxygen output for my needs and the battery life is good. I use it on setting #6 and the large battery lasts for over 3 hours. I do a lot of walking using the back pack accessory and it is great for this. I highly recommend this unit.

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  4. SUSAN

    Working with NIck has been a joy. So knowledgeable and helpful. Open to my questions. Explained the differences in various Inogen One levels and helped choose the one we needed.

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  5. Tracie

    Excellent customer service! The sales rep I talked with contacted my Dr to get the prescription for the oxygen, so I didn’t have to worry about it. A week after I got the concentrators, their service,dept called to make sure everything was working well, and answer any questions I had. Very quick shipping, and the home concentrator and the inogen g5 portable concentrator work beautifully. Both are extremely quiet, small and easy to maintain. The portable concentrator is very light, and 100% more efficient than heavy o2 tanks. My insurance did not cover any of the cost but, My life is so much easier, and it has given me back my independence. I can do whatever my breathing allows me to do now. 100% recommend this company, and the product.

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  6. Lehbib

    I purchased an Inogen one g5 concentrator from this store. The machine worked perfectly as expected. Support responses was quick and accurate. Thank you for your good service.

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  7. Bonnie

    I only had it a few days. Katie Yeadon is on the ball. I used it one day so far and all is well with the G5. I choose that one because of the longer hours it has. I was tired of feeling like a prisoner in my home. I wasn’t able to be out more than 2 hours without carrying extra tanks with me. Now I can do more things with the G5

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  8. Bertha

    My husband is on oxygen 24/7 and his old portable wasn’t charging well enough for him to go to the doctor. He is very pleased with his new Inogen machine so far it does what he needs

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  9. Howard

    This is allowed me so much more comfort and ease of using the oxygen concentrator when I’m out away from the house my old portable concentrator was so loud and noisy it sounded like a B-52 was in the room it made people uncomfortable with my use

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  10. Patricia

    The Inogen has been worth every penny spent!!! After having most of a lung removed due to cancer, he was limited on how far he could walk. The tanks that the VA doctors sent never lasted for a month and were heavy.
    Our salesman was excellent and very knowledgeable helping me to get the right model. Thank you so much. I have already recommended a few other people to you in our retirement community.

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  11. Bill

    Bret knows his job well. No pressure sales. G5 arrived sooner than I thought.

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  12. Jason

    Product is good.

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  13. Ed

    This product is wonderful and delivers what it says.

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  14. Lindy

    The G5 seems noisy compared to my older G3 plus the single battery runs out of juice pretty fast I have double and single batteries for my G3 as well as external chargers and a car charger. Inogen made sure that nothing from the G3 fits the G5! That would make too much sense, wouldn’t it!

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  15. Maureen

    Helpful and honest recommendations from Rex. Purchased G5 which became loud over first days. G5 replacement handled efficiently. New machine is great. Phone calls / questions post purchase are answered quickly. Will highly recommend this organized and responsive company to others.

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  16. Gregory

    My husband and I bought 2 and we love them. No more hoops with our Medicare driven provider. Thank you so much.

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  17. Ken

    Other than gettng my doctor to fax the prescription, the service was excellent. Nick explained how the product works and why I didn’t need a back up battery. Then after it arrived at my house the service desk was excellent. They answered the phone quickly and walked me through it perfectly.

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  18. Charles

    It could come with a cart due to its weight. When I had one in the past it came with a cart. Other than that every thing works fine,

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  19. M FitzHarris

    Colton called us from an inquiry through the internet very quickly. He was informative, cooperative and supportive of my father’s situation. We ordered the equipment that same day, and received the order within two days. Overall an excellent experience.

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  20. Samantha

    They were excellent and recommended the best product for me. It was tested, and has been working great. I would recommend this company for sure. Very happy with my portable oxygen compressor!

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