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Inogen Portable Oxygen Concentrator Review 2023

Sep 13, 2023
Fact Checked
Written by:
Medical Reviewer: PCNP
Reviewed by: BSPharm, MPH, Senior Director, NCOA Center for Healthy Aging

Key Takeaways

  • Inogen portable oxygen concentrators range from $1,895–$3,079, depending on the battery and warranty you select.
  • These portable oxygen concentrators are all pulse flow, Federal Aviation Administration (FAA) approved, and have a range of flow settings (which determine how much oxygen they dispense).
  • The company offers a 7-day risk-free trial, a 3-year standard warranty, and an option for an upgrade to an unlimited warranty.

Inogen offers two travel-friendly, FAA-approved portable oxygen concentrator models, which means that each model is approved for use on airplanes by the FAA. The company also offers one home oxygen concentrator. Keep reading for our Inogen portable oxygen concentrator review and to discover the pros, cons, and costs of each model so you can determine the best oxygen concentrator for you.

Why you can trust our expert review

Our Reviews Team recommends products and services we believe provide value in the lives of our readers. We’ve spent more than 1,000 hours carrying out in-depth research on portable oxygen concentrators to give you the most accurate review. To make our selections, we:

  • Engaged in independent research
  • Mystery shopped four brands and five models of portable oxygen concentrators
  • Reviewed academic research into the efficacy of portable oxygen concentrators
  • Read verified customer reviews from trusted third parties such as the Better Business Bureau (BBB) and Trustpilot

Our Reviews Team consulted with three geriatric care experts to learn more about portable oxygen concentrators and how they can enhance users’ quality of life. We determined the following factors to be important for our readers when shopping for a portable oxygen concentrator:

  • Cost
  • Ease of use
  • Oxygen delivery method
  • Number of settings
  • Weight
  • Battery life
  • Time to recharge battery
  • Warranty

We had all of our selections medically reviewed by an expert in the field to ensure that each brand and model is appropriate for our readers’ needs.

Why Inogen is one of our Reviews Team’s top picks

Our Reviews Team chose to review Inogen because it offers one of the smallest portable oxygen concentrators on the market—the Inogen One G4—and because all of its models are FAA-approved (suitable for use on an airplane).

When researching Inogen, our Reviews Team also liked that Inogen has two warranty options, a robust frequently asked questions section on its website, and a convenient purchasing option. A notable drawback is that the company only offers intermittent flow options, also known as pulse flow, which may not work for those who need a continuous flow portable oxygen concentrator.

We’ll cover some pros and cons of the Inogen One models, how to purchase these portable oxygen concentrators, and how the company compares to other brands.

Pros and cons of Inogen

  • 7-day risk-free trial on all machines
  • Two warranty options: standard 3-year or upgrade to unlimited
  • All portable oxygen concentrators are FAA-approved
  • Good flow range settings for the G5 model
  • At Home model is one of the lightest stationary concentrators available
  • Only offers intermittent flow
  • Machines aren’t water-resistant
  • At Home machine doesn’t have Bluetooth capabilities

Table 1 Comparisons of Inogen portable oxygen concentrators, as of August 2023

Inogen model



At Home


$1,895–$2,095, depending on the battery 

$2,882–$3,079, depending on the battery


Battery life

Single battery:
2.7 hours (setting 1)
2.25 hours (setting 2)


Double battery:
Up to 5 hours
on setting 1

Single battery:
6.5 hours (setting 1)
5 hours (setting 2)


Double battery:
Up to 13 hours
on setting 1

Not applicable; runs on electricity

Type of flow

Pulse flow

Pulse flow

Continuous flow

Flow settings




Max oxygen output by liters per minute (L/min)

0.63 L/min

1.26 L/min

5 L/min

Noise level in decibels (dB)

40 dB (setting 3)

39 dB (setting 2)

40 dB (setting 2)





Bluetooth capabilities








Warranty or protection plan

3 years

3 years

3 years 

Free trial

7 days risk-free

7 days risk-free

7 days risk-free

Inogen portable oxygen concentrator reviews

Inogen One G4

Inogen One G4 review

  • Cost: $1,895–$2,095, depending on the battery 
  • Weight: 
    • 2.8 pounds with single battery
    • 3.3 pounds with double battery
  • Dimensions: 
    • 5.91 inches long x 2.68 inches wide x 7.2 inches high with single battery 
    • 5.91″ L x 2.68″ W x 7.79″ H with double battery
  • Battery life: 
    • 2 hours, 40 minutes on setting 1; 2 hours, 15 minutes on setting 2 with single battery
    • Up to 5 hours on setting 1 with double battery
  • Battery charging time: 3 hours, 25 minutes for single battery
  • Delivery/flow type: Pulse flow
  • Range of flow settings: 1–3
  • Noise level: 40 dB

The Inogen One G4, a portable intermittent flow oxygen concentrator, is lighter than the G5, making it the lightest model on this list. If weight and ease of portability are your most important considerations, the G4 may be a good fit.

It’s also the cheapest option for an Inogen portable oxygen concentrator that has Bluetooth capabilities. The other model on this list that has Bluetooth capabilities, the G5, costs about $200 more on average. 

All Inogen portable oxygen concentrators have a similar noise level—the G4 is 40 decibels, and the G5 is 38. You can charge the G4 on AC power inside the home or by using DC power in a car or airplane. Inogen also offers an optional external charger for when you’re away from home.


The G4 offers the lowest battery life on this list, providing less than 3 hours of power on setting 1.

In addition, the G4 has fewer oxygen flow settings (1–3) compared to the G5’s 1–6 flow settings. Fewer settings may mean less variability between adjustments.

The G4 isn’t water-resistant, but Inogen has stated that the concentrator was tested to withstand rain for short periods, such as while transferring it from a car to a home. Adding a carrying bag will provide another layer of protection for your portable oxygen concentrator. 

Inogen also recommends that you avoid running your G4 in temperatures lower than 41˚F or higher than 95˚F for an extended time, since extreme temperatures can shorten your battery life.

Inogen connect app

The G4 does have Bluetooth capabilities, allowing you to use your smartphone or tablet to connect to your concentrator through the Inogen Connect App, which you can download from the App Store and Google Play

The app allows you to view information such as the concentrator’s filter life, nasal cannula life, battery cycles, and battery status. It also alerts you to software updates for your concentrator. This helps keep the machine working properly.

Filter life shows the number of days since the filters were last cleaned, making it easier to remember to schedule the recommended weekly cleaning. Cannula life shows the number of days since the cannula was last changed, which should be replaced based on your physician’s instructions. Finally, the battery cycle shows the number of times you have fully charged the battery. The G4’s battery lasts for 500 total charges. 


The Inogen One G4 comes with the following supplies:

  • Portable oxygen concentrator unit
  • Nasal cannula
  • Wall (AC) charger/power cord
  • Car (DC) charger/power cord
  • One rechargeable battery
  • Custom carrying bag
  • Carry strap
  • User manual

Inogen offers additional accessories for purchase with the G4, such as a custom G4 backpack, carrying bag, and hip bag.

The G4 could be a good option for those searching for a lighter machine with an app connection that they can purchase rather than rent. If you are looking for longer battery life, lower noise level, and more flow settings, the G5 might be a better choice.

Inogen One G5

Inogen One G5 review

  • Cost: $2,882–$3,079, depending on the battery 
  • Weight: 
    • 4.7 pounds with single battery
    • 5.7 pounds with double battery
  • Dimensions: 
    • 7.19 inches long x 3.26 inches wide x 8.15 inches high with single battery
    • 7.19″ L x 3.26″ W x 9.03″ H with double battery 
  • Battery life: 
    • 6.5 hours on setting 1; 5 hours on setting 2 with single battery
    • Up to 13 hours on setting 1 with double battery
  • Battery charging time: 4 hours for single battery
  • Delivery/flow type: Pulse flow
  • Range of flow settings: 1–6
  • Noise level: 39 dB

The Inogen One G5 is a pulse flow portable oxygen concentrator with a range of 1–6 flow settings, the highest variety of settings for the three Inogen One machines. This machine is also the quietest oxygen machine from Inogen, with a noise level of 39 dB. The G5’s size is bigger than the G4. 

The G5 has the longest battery life of the two portable models, reaching 6.5 hours on setting 1 with one battery, and up to 13 hours with the optional double battery. This option is great if you’re looking for long battery life. While the battery lasts longer, it does take 35 minutes longer to fully charge than the G4’s battery, clocking in at 4 hours charging time.

Like the G4, the G5 has Bluetooth capabilities, allowing you to use your smartphone or tablet to connect to the Inogen Connect app to check the status of your filter, cannula, and battery life, and to access the user manual, FAQs, and troubleshooting tips. Having these resources available through your smartphone or tablet is convenient and can make the process of getting to know your portable oxygen concentrator easier, saving time and energy and helping you to schedule recommended filter and cannula cleanings. 


The G5 has a lot going for it—it has the longest battery life, the most flow settings, and the lowest noise level of any model on this list. But it is the most expensive, at about $200 more on average than the G4. 

It’s also the heaviest portable model on this list. 

But higher cost and weight are the only notable drawbacks of the G5 compared to the G4. It outperforms the G4 in every other criteria our Reviews Team used to evaluate these models. 


The Inogen One G5 comes with the following supplies:

  • Portable oxygen concentrator unit
  • Wall (AC) charger/power cord
  • Car (DC) charger/power cord
  • One rechargeable battery
  • Custom carrying bag
  • User manual

You can purchase additional accessories for your G5, such as a custom G5 backpack, carry bag, and cart to help transport your portable oxygen concentrator. 

The G5 model may be a good fit for those who want a longer battery life, a quieter machine, and Bluetooth technology. If you want a lighter portable oxygen concentrator, you might prefer the G4 model.

Product Availability

Inogen plans to discontinue the G5 and replace it with the Rove 6 in late 2023 or early 2024 to comply with European regulations. The Rove 6 will be extremely similar to the G5 model.

Inogen At Home oxygen concentrator

Inogen At Home review

  • Cost: $1,645
  • Weight: 18 pounds
  • Dimensions: 7″ L x 13″ W x 16.5″ H 
  • Battery life: Not applicable; runs on electricity 
  • Battery charging time: Not applicable; runs on electricity 
  • Delivery/flow type: Continuous flow
  • Range of flow settings: 1–5
  • Noise level: 45 dB

The Inogen At Home model is the only continuous flow and at-home model Inogen offers. It has a noise level (45 decibels) that is similar to other continuous flow portable oxygen concentrators our Reviews Team has researched. This model is different than the other Inogen models in that it runs on electricity, so there is no charging time or battery life to consider. It uses about 100 watts of energy, which is approximately the same as a standard 100 watt lightbulb (standard lightbulbs used in the home). If you need a continuous flow oxygen concentrator and spend most of your time at home, the Inogen At Home model could be a perfect fit for you.


The biggest drawback of the At Home concentrator is that it’s generally more expensive than other non-portable concentrators. Also, because it isn’t a portable concentrator, it’s not FAA approved and its use on airplanes isn’t permitted.

Another drawback is that the At Home model doesn’t have Bluetooth capabilities and doesn’t connect to the Inogen Connect App like the G4 and G5 machines do. The app is a useful tool that allows you to check your battery life, monitor your oxygen use, and more.


The At Home Oxygen Concentrator comes with the following supplies:

  • Oxygen concentrator unit
  • Wall (AC) charger/power cord
  • Nasal cannula
  • User manual

Inogen history

Inogen was founded in 2001 by University of California, Santa Barbara, graduates Alison Bauerlein, Brenton Taylor, and Byron Myers after their idea for a portable oxygen concentrator won the 2001 UCSB New Venture Competition

Inspired by Bauerlein’s grandmother, Mae, who complained to her granddaughter about the inconveniences and limitations of using a heavy oxygen tank, the group went on to create Inogen, the first company to make portable oxygen concentrators available to the public. The mission behind the company was to help patients lead healthier, more active lives.

How to set up Inogen oxygen concentrators

On the Inogen website, there are several YouTube tutorial videos, including step-by-step videos on setting up Inogen’s portable oxygen machines. For example, the Inogen G5 video outlines nine simple steps for setting up your Inogen G5:

  • Step 1: Remove your Inogen G5 from the carrying bag
  • Step 2: Place the battery in your Inogen G5
  • Step 3: Ensure the particle filters are in place
  • Step 4: Charge the battery
  • Step 5: Connect the nasal cannula
  • Step 6: Turn on the G5
  • Step 7: Set the flow setting
  • Step 8: Position the nasal cannula
  • Step 9: Get comfortable with the G5

If you need assistance with setup, contact Inogen’s customer care team 24/7 at 877-466-4364.

How much do Inogen portable oxygen concentrators cost?

Inogen portable oxygen concentrators vary in cost, ranging from $1,895 to $3,079, depending on the battery (single or double) and warranty you select.

On the Inogen website, you can purchase the G4 and G5 machines directly from the company. 

There are no financing or payment plan options available, but Inogen does offer a 7-day risk-free trial for all of its portable oxygen concentrators.

How to pay for Inogen portable oxygen concentrators

To buy the G4 or G5, make sure you have a current oxygen therapy prescription from your doctor, then go to the Oxygen Concentrator Store or Inogen website to choose the model you’d like to purchase. Both the Oxygen Concentrator Store and Inogen can bill Medicare or insurance directly.

After you select the model, battery type (single or double), and warranty options (3-year or lifetime), click “Add to Cart.” You can make your purchase using a Visa, Mastercard, American Express, or Discover credit card. After you submit, an Inogen representative will confirm your order by phone.

To purchase the At Home model, you’ll need to have a current prescription from your doctor. With your prescription information in hand, go to the Oxygen Concentrator Store or Inogen website, choose a warranty option (3-year or lifetime), and click “Add to Cart.” Just like the portable concentrators, the At Home can be purchased with a Visa, Mastercard, American Express, or Discover credit card.

Inogen app and accessories

Inogen offers the Inogen Connect App for the G4 and G5. The app is not available for the At Home. The app allows users to monitor information, such as battery life, battery status, nasal cannula life, filter life, column life, and more. Being able to easily check this information helps ensure  peace of mind that your portable oxygen concentrator is operating optimally and keeping you safe and healthy.

Several accessories and replacement parts are available for Inogen’s portable oxygen concentrators.

AccessoriesCostCompatible Models
External battery charger$330 G4, G5
Replacement column pair$114 G4, G5
AC power supply$91–$172G4 ($91); G5 ($172)
AC power cord$23 At Home
DC power cable$79 G4, G5
Replacement particle filter$14–$24G4 ($14); G5 ($24)
Transportation cart$145 G4
Carrying bag$28–$68G4 ($28); G5 ($68)
Backpack$116 G4, G5
BatteriesSingle: $393; Double: $597G4 and G5
Carrying strap and hip bagStrap: $17; Bag: $68G4

Users can purchase these accessories and replacement parts online at the Inogen website or the Oxygen Concentrator Store using a major credit card.

Inogen customer service and satisfaction

All of the models in this review are available through the online retailer Oxygen Concentrator Store. You can contact its customer service department in the following ways:

  • Phone: 844-885-9530, available 365 days a year on the following schedule:
    • 6 a.m. to 9 p.m., MT, Monday through Friday
    • 7 a.m. to 7 p.m., MT, Saturday
    • 8 a.m. to 7 p.m., MT, Sunday 
  • Email:
  • Online chat: On the Oxygen Concentrator Store’s support page
  • Contact form: Submit an online ticket, and a representative will respond within one business day.

The Oxygen Concentrator Store website also has a detailed product support page with information on cleaning, maintenance, and use of portable oxygen concentrators.

Our Reviews Team’s customer service experience

A member of our Reviews Team called the Oxygen Concentrator Store to learn more information about all of the models in this list. It took less than 30 seconds to get a representative on the line, and he was friendly, helpful, and knowledgeable about every model we asked about.

He shared that all of the portable oxygen machines sold through Oxygen Concentrator Store come with a free, seven-day trial period (although you will have to pay for return shipping). If you find the unit you’ve purchased has mechanical problems, is hard to use, or just isn’t a good fit for you, call the store to receive a shipping label. Then you can send the unit back (at your own cost) and exchange it for a different one. 

After sharing details of the various models over the phone, the representative offered to email the information as well and gave us his direct phone number for any future questions. 

He also said even if we didn’t buy a unit from Oxygen Concentrator Store, he would be happy to answer questions and provide help in the future. We were very pleased with the customer service experience; it felt like we were learning about portable oxygen concentrators rather than enduring a high-pressure sales call.

Inogen warranty, maintenance, and care

All of Inogen’s portable oxygen concentrator models offer a 3-year standard warranty, including three years on the concentrator, one year on the sieve beds (the filters inside the oxygen concentrator), battery, and accessories. Inogen customers can also upgrade to a lifetime warranty for an extra cost, which varies for each model.

To clean your portable oxygen concentrator, Inogen recommends cleaning your nasal cannula daily, the concentrator case when it gets dusty, and the particle filters—which are the filters on the front—weekly. You can use a damp washcloth with water and a mild detergent to clean the particle filters.

For battery maintenance, Inogen recommends keeping batteries dry at all times and avoiding using the portable oxygen concentrator in temperatures less than 41 F or higher than 95 F.

Table 2 Comparisons of Inogen vs. other portable oxygen concentrators, as of August 2023





Philips Respironics






Delivery/flow type





Weight (pounds)





Battery life (hours)





FAA-approved (suitable for use on airplanes)





Inogen oxygen concentrator customer reviews

Inogen is accredited by the Better Business Bureau (BBB) and has a customer rating of 1.19 stars out of 5, based on 36 customer reviews.8

While Inogen’s BBB customer rating is low, it’s worth noting that it’s accredited by the BBB with an A+ rating. Customer reviews don’t factor into the BBB ratings—those are determined by things like whether the company responds to complaints in a timely fashion and whether customers are satisfied with the way their complaints were handled.

The company is also verified on Trustpilot, with an “average” rating of 3.7 out of 5 stars, based on more than 2,900 reviews.9 

Arrived on time with no hassles. Been using it every night. If I stop breathing, or the cannula falls out, it starts beeping at me!


I now have the freedom to travel to visit family and not have to worry about low blood oxygen. So light that it weighs less than my purse. I purchased the G4, which meets my needs now, but wish I would have purchased the G5 for the higher oxygen levels settings for future needs.


“I really like the portability of the unit I have now, and I’m glad I bought it with both a small battery and a large one. However, I find the larger battery to be exhausting to carry, and if I had it to do over, I would have bought another small one. I don’t find it particularly quiet, but I used it at a Broadway performance of Hamilton the first time out, and no one seemed bothered at all.”


Bottom line

Inogen offers two lightweight (2.8–4.7 pounds), pulse flow oxygen concentrators that are all FAA-approved. The company also has one at-home continuous flow model. Though the prices vary from $1,895–$3,079, there are different options to choose from that can change the cost: the battery (single or double) and the warranty (3-year or lifetime).

Inogen may be the right choice if you want pulse flow and a lighter oxygen concentrator. If your doctor or health care provider has prescribed a continuous flow oxygen concentrator and you would prefer to have a portable model, you will need to select another type of portable oxygen concentrator.

Frequently Asked Questions

Have questions about this review? Email us at


  1. 3M. The Sound Around Us. Found on the internet at
  2. U.S. Food and Drug Administration. Pulse Oximeters and Oxygen Concentrators: What to Know About At-Home Oxygen Therapy. Found on the internet at
  3. Breathe, European Respiratory Journal. Oxygen devices and delivery systems. Found on the internet at
  4. Oxygen equipment & accessories. Found on the internet at
  5. American Lung Association. COPD Prevalence. Found on the internet at
  6. National Heart, Lung, and Blood Institute. What is COPD? Found on the internet at
  7. Better Business Bureau. Inogen. Found on the internet at
  8. Trustpilot. Inogen. Found on the internet at
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