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Inogen Portable Oxygen Concentrators

4.55 Stars (120 Reviews)
Updated: January 8, 2024
By: Jonathan Trout
Jonathan Trout
Content Manager
Jonathan is a former product and content manager for Retirement Living. His background spans sales/marketing, finance, and telecommunications. Jonathan’s expertise in consumer wellness and research-backed data stories helped educate seniors on financial planning, retirement, and community resources. Jonathan graduated from Oklahoma State University with a B.S. in Environmental Sociology.
Content Manager
Edited By: Lauren Hamer
Lauren Hamer
Sr. Editor
Bringing more than a decade of editorial experience to Retirement Living, Lauren focuses on reporting senior-related issues, including retirement planning, finance, consumer protection, and health and wellness. Lauren has edited consumer content for Credible, Angi, Slickdeals, Jobs for the Future, and more.
Sr. Editor

Inogen® has been developing, manufacturing, and marketing innovative portable oxygen concentrators used to deliver supplemental long-term oxygen therapy to patients suffering from chronic respiratory conditions since 2001. They are a leading global medical technology company offering innovative respiratory products for at home use.


Editorial Breakdown

Price 4.8 Stars
Flow Settings 4.8 Stars
Battery Life 4.3 Stars
Customer Service 4.5 Stars

Overall Rating 4.6 Stars

Bottom Line

Inogen® designs and sells oxygen concentrators including two models of portable oxygen concentrators and one in-home oxygen concentrator. All Inogen® oxygen concentrators meet FAA standards.

Inogen Portable Oxygen Concentrators Review

Inogen’s industry-leading warranty is one of the reasons it’s one of our top picks for Best Portable Oxygen Concentrators. Its proprietary Intelligent Delivery Technology delivers oxygen within the first 400 milliseconds of inhalation when oxygen has the most effect on lung gas exchange. Intelligent Delivery Technology received clinical study validation for providing the necessary oxygen levels to most patients during any activity throughout the day and all sleep phases. An Inogen One portable oxygen concentrator can simplify life by replacing all oxygen sources for most people requiring this therapy.

Inogen’s portable oxygen concentrators require no tanks to refill or replace and no regulators. The company offers “oxygen therapy on your terms” because when you switch to an Inogen One, you no longer need to plan your week around oxygen tank deliveries and the insurance, copays and other bills that come with ordering tanks.

The Inogen One portable oxygen concentrator plugs into a wall outlet or DC car outlet for power, or use the rechargeable battery when walking around the house or the town. Inogen makes traveling with a POC much easier compared to traveling with tanks, and both Inogen One models are approved for use onboard all U.S. airlines. Inogen portable oxygen concentrators come with a 30-day risk-free trial (purchase only, restocking fees may apply), and a three-year to lifetime warranty with the bundles discussed below.


  • Lifetime warranty (with Freedom Bundle or Package)
  • Complimentary clinical services from licensed nurses and respiratory therapists
  • An all-in-one solution for stationary, portable, and travel use, day or night
  • 30-day free trial (purchase only, restocking fees may apply)


  • Insurance may not cover a portable oxygen concentrator

Inogen Portable Oxygen Concentrator Cost by Model

Choosing between Inogen portable oxygen concentrator (POC) models is uncomplicated with Inogen’s small but powerful line of products. The Inogen One comes in two models: the G4 and the G3. As the name implies, the Inogen At Home is meant for use around the house with no battery power, but is still very lightweight when compared with most home units.

Inogen Portable Oxygen Concentrators
Feature Inogen One G4 Inogen One Rove 6 Inogen At Home
Technology Wearable Wearable Stationary
Pulse Flow Settings 3 5 N/A
Continuous Flow N/A N/A 1-5 liters/min.
Weight 2.8 lbs* 4.8 lbs** 18 lbs
AC Power Yes Yes Yes
DC Power Yes Yes No
Battery Life 5 hours*** 10 hours**** N/A
Inogen Connect App Yes No No
Warranty Lifetime Lifetime 3 yrs to lifetime
Price w/ Shipping $4,215 to $4,630 $3,581 to $3,983 $1,703 to $2,158
*with a single battery
**with a single battery
***with a double battery
****with a double battery
Intelligent Delivery Technology is available only on Inogen One POC models.

Inogen includes a carrying bag, AC/DC power cords (AC for At Home) and free shipping with each portable oxygen concentrator. The G4 works with the Inogen Connect mobile app to view battery and column life, reset columns, receive maintenance reminders and software updates for the G4, and more.

Inogen Freedom Bundle and Packages

Both the Inogen One G4 and G3 offer money-saving Freedom Packages with extra batteries and a lifetime warranty. The Inogen Freedom Bundle offers the highest level of savings, combining an Inogen At Home with an Inogen One G4 with standard equipment, or a G3 with both single- and double-cell batteries, plus a lifetime warranty for around $4,600.

Without a bundle or package, you get a three-year warranty, and Inogen One models include a single-cell battery.

Inogen Portable Oxygen Concentrator Accessories

Inogen offers a full line of accessories for both portable oxygen concentrator models at very reasonable prices. You can buy a carry strap ($13.95) or hip bag ($59) for the Inogen One G4. Accessories for both the G4 and G3 include:

  • Rechargeable Lithium-ion Batteries: Single ($325), Double ($495), External Charger ($285)
  • Power: AC power supply ($79 to $149), DC cable ($65)
  • Filtration: Particle filter ($11.95 to $21)
  • Bags: Backpack ($100) or Carrying bag ($24.95 to $49)

Where to Buy Inogen Portable Oxygen Concentrators

Inogen sells directly via the company website, over the phone and through authorized resellers. You will find all pricing and product details on the site.

The company also rents portable oxygen concentrators, with Inogen One G3 rentals being covered by many insurance companies and Medicare as durable medical equipment. While Medicare or most private insurance benefits don’t include the Inogen One G4, many find the cost worthwhile for a portable oxygen concentrator weighing under three pounds, so it can be carried in a backpack, handbag, or on the hip. If you have Medicare Supplement or Medicare Advantage insurance, you may find you have partial coverage.

Inogen Complaints

Inogen is accredited with the Better Business Bureau with an “A+” rating. ConsumerAffairs ranks the POC provider in their top five choices, and Top10Reviews calls the G4, “one of the lightest oxygen concentrators available on the market today.” Trustpilot has nearly 3,100 consumer reviews to date with an average 4 out of 5-star rating. The majority of Inogen G3 customers leaving comments in the COPD Foundation online community are overwhelmingly positive.

inogen pocs

Source: Inogen

Inogen Portable Oxygen Concentrators Q&A

  • Are Inogen portable oxygen concentrators noisy?
    While you will hear a slight hum and a whoosh sound from the concentrator as it converts air to oxygen, the Inogen One G3 and G4 are two of the quietest portable oxygen concentrators on the market.

  • Do commercial airlines allow Inogen portable oxygen concentrators on flights?
    Yes. The FAA approves both Inogen One models for use on any commercial aircraft with flights in the United States.

  • What type of maintenance do Inogen portable oxygen concentrators require?
    The particle screen and filters should be cleaned with mild detergent and water weekly. The metal columns holding the sieve beds should be replaced every 18 to 24 months. Read more about properly maintaining your portable oxygen concentrator.

  • Do I need a prescription to purchase a portable oxygen concentrator?
    Yes, to buy or rent a POC from any provider, you must have a valid prescription.

  • What makes Inogen stand out as a portable oxygen concentrator manufacturer?
    Inogen is certified by the Accreditation Commission for Health Care (ACHC) and won many awards such as Design of the Decade, Medical Design Excellence Awards Gold Winner and Frost & Sullivan Oxygen Therapy Product of the Year, among others.


Inogen’s made-in-America, lightweight portable oxygen concentrators help oxygen therapy patients live an independent lifestyle thanks to competitive pricing and an industry-leading warranty.

For more information about Inogen portable oxygen concentrators check out their website to request a free info kit or call 888-233-9536

120 Inogen Reviews

Write Review

Featured Review

5 Stars

July 04 2019 6:41PM

I own a G4 and rent a G3 and stationary unit with continuous flow for use at night. I travel by air without problems and my G4 is small, comfortable and sturdy. I use the G3 for backup. Whenever I have had any issues or needed replenishment supplies, Inogen has been helpful and prompt. I purchased and rented directly from Inogen and have been a customer since 2015.

Joyce K.
Norfolk, WV
1 Star

June 03 2023 11:32PM

My mother is on oxygen 24/7. She lives alone. Currently, her portable unit (Inogen 1) won’t hold a charge. She has called customer service MULTIPLE times without success.

I called (877)466-4364 tonight and they aren’t able to call me back until Monday. She has no way to get to the pharmacy to retrieve her meds. This is absurd. I will be transferring my mom’s care to a different company.

Stephanie S.
Blythewood, SC
5 Stars

July 22 2022 6:03AM

I bought this machine (mdl #4???) more than 3 years ago. ABSOLUTELY the BEST. My insurance co supplied me with two different machines and they both broke down within 14 day. Were very noisy and unreliable. THANKS guys for such a GREAT machine!!! The double battery is WORTH the extra money.

Dale S.
Eugene, OR
1 Star

September 22 2021 4:32PM

I have had nothing but problems since the day the concentrator was received. The salesman lied to me again and again. I was told that in order to get the portable Inogen I would have to buy the whole unit which includes the oxygen concentrator.

He also told me that Medicare would send me the monthly payment and that I should send that money to first class medical. After speaking to Medicare they informed me that they never send patients payments.

I also talked to a supervisor at Care Airways Co. and all he did was call representatives at Medicare "bone heads". The total bill came to $4500. I was switched to a finance company which I thought was first class medical.

I am in the process of trying to send back the concentrator and portable but I am having a very hard time. I am now waiting for the finance company to return my phone call so I can return the items. This has to be the worst company I have ever dealt with.

Florence R.
Cranston, RI
1 Star

July 10 2021 5:18PM

The first machine was not powerful enough so we ordered a second. Just outside of our 30 day buy back window my stepfather passed away and Inogen is offering us no options.

They know that their customers are mostly terminal and would rather collect money from their family than offer some sort of buyback program or extended return option in these cases. It's disgusting honestly.

Shakyra M.
New York, NY
4 Stars

July 02 2021 3:31PM

In general, Inogen portables are good but the cases have issues. The shoulder strap connects with a hook that easily disconnects. When that happens the machine falls on the floor, which can't be good. Please redesign the hook.

The new G5 comes with a handsome leather case, but the bottom padding is on the corners and so the machine will not sit upright. In addition, putting the canula connection on top of the machine means it's usually kinked.

The older machines with connection on the side were less susceptible. Does Inogen ever talk to users when it designs its equipment?

Kathye T.
Denver, CO
1 Star

June 21 2021 2:27PM

I just hung up with their customer service. Worst experience ever. I have no words for how bad these people were.

I was calling on behalf of my mother (and they knew it). First they asked for all my personal data. Then they wouldn't answer a simple question as to if I'll be able to order a concentrator using a foreign prescription.

When I told them that if they won't answer I'll just go ahead and order they told me it wasn't going to be possible. It took me 20 minutes to get that easy answer to a yes or no question.

Now they have my personal data. If I can retrace spam I receive to Inogen, I just want to let them know that I can and will sue them for that. Worst customer service ever. Stay away.

Amine G.
5 Stars

June 07 2021 5:10PM

Inogen has been Amazing since the first conversation we had with Tom. We had been using the portable canister system. It was very inconvenient & bulky. Plus way too heavy for Marie to carry herself...which was keeping her from being as independent as she likes.

Tom answered all our ?'s & put our mind @ ease that Inogen 4 for the way for us to move forward w/ our traveling oxygen needs. We Love It!! Tom also has kept in contact to make sure everything is running smooth & we are all doing good.

Most companies these days MIA as soon as you've given them your money. Inogen is definitely a company that goes above & beyond in every area. Thank You to All.

Ann S.
Elkhart, IN
4 Stars

June 07 2021 12:47AM

I have had my Inogen One G4 for three years. First, I love the convenience, the size, the portability. Initially I only used it at night and when I flew on airplanes. After a recent COPD exacerbation, I am having to use it more frequently, especially when I exert myself.

It provides me with the O2 I need. Initially, I found the pulsating delivery a bit strange since I was used to continuous flow from an O2 tank. However, I now find it comforting, especially at night since between the hum of the unit and the pulse, it provides soothing white noise.

Fortunately, when I purchased the unit I bought the lifetime warranty. I say fortunately, because I have had to have it replaced numerous times because of various issues.

Sometimes it's been an issue with overheating; sometimes it's been a problem with alarms going off for no reason while I sleep; once it just totally stopped working; once it became very loud, and once the metal nipple broke off.

The good news is that Inogen has always agreed to replace it. Usually, it is overnighted so I have a functioning unit very quickly. Initially Inogen used UPS which delivered the replacement and immediately picked up the returning unit in the same visit.

UPS always provided me with a date and a delivery time window which made it easy to know when the unit was arriving. Additionally, UPS has an app that allows you to follow your delivery.

Recently Inogen has switched to FedEx which is not nearly so responsive. They only provide a delivery day but no time, so I have been stuck waiting.

Also, they do not take the returning unit at the same time and it's usually a couple of days later, but they do not provide a day or time, so I've missed the pickup sometimes.

Another issue, is that when I have called, the customer service person, until recently, did not provide any tips to trouble shoot, but immediately recommended a switch out.

This last time, however, when my unit was overheating, I had a great customer service person who walked me through some steps to trouble shoot. In the end, she had me press the + while the unit was off, plugged in and had no battery attached.

From the readout, she was able to ascertain that indeed my unit was overheating. After some discussion with her supervisors, given how frequently my unit had to be changed out for a reconditioned unit, she had a brand new unit sent to me.

Additionally, when I told her about my issue with FedEx and their pickup service, she emailed me a shipping label, so once I got the new unit I was immediately able to take the return to a nearby FedEx office.

Bottom line, I really like my unit when it works. If I didn't have the lifetime warranty, I would be very upset.

Finally, I recently had to replace the filter screen which I had lost. I didn't mind the price of the replacement ($12.00 for a piece that probably cost $2.00 to manufacture), but the $9.00 shipping was ridiculous for such a small, light piece.

Joanne S.
Laurel, MD
4 Stars

May 30 2021 12:53AM

The Sales person whose name doesn't come to mind at the moment unfortunately was excellent, came across as a very caring person determined to do the best for me.

Have two problems however, was given to understand that this machine is quiet whereas in fact I find it a little noisy and would not be able to use it at a show for example as it would disturb others sitting near me.

The second problem I have is with the Cannula, have finally found one that fits better in my nose and is soft, however most of the Cannula tubes are thick and a little too long and therefore unable to fit neatly in the pocket provided. Perhaps a larger pocket could be provided?

Doreen S.
Seminole, FL