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What to Look For in a Portable Oxygen Concentrator – Common Questions & Answers
What to Look For in a Portable Oxygen Concentrator – Common Questions & Answers
Inogen, Inc.
August 31, 2026 • 12 min read
Patients researching portable oxygen concentrators (POCs) often want to compare features, portability, and battery performance. Because oxygen needs vary by prescription and lifestyle, no single device is the right choice for everyone.
For example, the Inogen® Rove 6™ may be a strong fit for users with high oxygen needs who require a portable device, while the Inogen® Rove 4™ could benefit users prioritizing a lightweight device. Both devices meet FAA requirements for travel and operate quietly.
These are just two of many different POC options available on the market today. In this guide, we’ll explore several common questions patients ask when researching and shopping for a POC and walk you through comparing the features of many modern POCs.
Choosing a POC involves weighing key factors like oxygen flow rate, weight, battery life, noise level, warranty, and FAA approval, since no single device is the right fit for every patient.
Battery life and flow settings are important for POC buyers — higher oxygen settings drain batteries faster, and many devices offer standard and extended battery options to support users’ lifestyle needs.
Long-term ownership considerations such as warranty coverage, app connectivity, and sieve bed replacement also factor into buying choices.
What Features Should I Look For When Choosing a POC?
You’re likely to come across many similarities when shopping for a portable oxygen concentrator. However, some notable differences may lead someone to choose one device over another, depending on their therapy and lifestyle needs. The oxygen delivery settings and flow rate, size, weight, and battery life are key features to consider.
Patients should also compare noise rating, warranty, FAA-approval (for air travel), price, and insurance coverage.
Some patients want a small, lightweight device with a high maximum flow rate. Patients with an active lifestyle may prioritize battery life or size.
This checklist can help you keep track of what to consider:
Key Considerations When Choosing a POC
Features & Functions
Questions to Ask
✓
Oxygen Delivery and Flow Settings
What type of oxygen delivery do I require – continuous flow or pulse-dose? How many flow settings does it provide?
✓
Flow Rate
What is the maximum flow rate? (in L/minute or mL/minute) What do you require for your prescription?
✓
Weight (with the standard battery and extended battery)
How heavy is the device with the standard battery and with the extended battery, if available?
✓
Size
How large is the device? Is it compact and easy to carry?
✓
Noise Rating
What is the noise rating? (usually measured in decibels or dBA)
✓
Battery Life (standard and extended options)
How long does the standard battery last on a single charge? How long does the extended battery last, if available?
✓
FAA-Approved
Can you use the device while on an airplane?
✓
LCD Screen & Device Controls
Is the LCD screen clear and easy to read? Are the device controls large and easy to use? Are there audible alerts?
✓
App Connectivity
Is an app available to monitor the device and your usage?
✓
Warranty / Extended or Lifetime warranty
What are the warranty options, and what do they cover? Do you prefer a device with an extended warranty?
✓
Price and Insurance Coverage
What is the cost of the device? Does your health insurance help to cover the cost?
✓
Accessories: carry bags and devices, battery chargers, power cables, etc.
What accessories are available for the device to help you carry it and keep it powered?
✓
Maintenance & Replacement Parts
How frequently do you need to maintain the device? Can you easily replace the parts yourself? What is the cost of replacement parts?
1) What’s the difference between Continuous Flow and Pulse-Dose Delivery?
Oxygen concentrators delivery oxygen in two ways: continuous flow dose delivery and pulse-dose delivery. Continuous flow dose delivery supplies a constant, steady, and reliable oxygen flow based on the setting number in liters per minute (LPM), while pulse-dose mode delivers a pulsed “bolus” of oxygen when the user begins to take a breath.[1]
Stationary oxygen concentrators typically provide continuous flow oxygen (such as Inogen® Voxi 5™ or Inogen®at Home™) Many small portable oxygen concentrators, like the Rove 4™ and Rove 6™ made by Inogen, provide pulse dose oxygen delivery to offer the most customized oxygen therapy experience for you. You may want to look for a POC that uses ‘smart’ technology for oxygen delivery, such as Inogen’sIntelligent Delivery Technology®– designed to deliver oxygen effectively and efficiently, whether you are sleeping, at rest, or exerting yourself.
Because your oxygen needs change based on what you’re doing (for example, when exercising, sleeping, or anything in between), POCs with smart pulse-dose technology, such as the Inogen® Rove 6™, will respond and deliver the correct amount of oxygen in that moment. This means that for some patients, POCs can meet their supplemental oxygen needs and may be used as their primary oxygen source. Many individuals also use a stationary concentrator at home—particularly if they require continuous-flow oxygen during sleep or higher flow rates during exertion. Guidelines recommend that patients maintain an oxygen cylinder as a backup source in case of power interruptions or device malfunction.[1-4]
Always talk with your clinician about what type of oxygen delivery system is appropriate for your medical needs.
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2) How do different portable oxygen concentrators compare in flow rate settings?
This is another common yet important question to ask. Oxygen needs can vary widely from one patient to the next; some patients require higher flow rates. Flow rate is the amount of oxygen being delivered and is measured in liters per minute, or LPM. You may also see this measured in milliliters per minute, such as 1,260 mL of oxygen per minute. Rates of 4 liters per minute or greater are considered higher oxygen flow.[2,3] Your oxygen flow rate requirement is determined by your doctor or care provider and outlined in your prescription.
Your liter flow requirement is one major deciding factor when choosing the right portable oxygen concentrator for you. For those who need a higher oxygen output, they should look for a POC that both meets their oxygen requirements and fits their lifestyle. Patients with higher oxygen needs may benefit from a POC that is lightweight, has a wide range of settings and a higher maximum flow rate. A POC such as the Rove 6™ provides up to 1,260 mL of oxygen per minute while still being portable and lightweight at just 4.8 pounds. Patients who require higher oxygen flow rates often benefit from portable systems capable of meeting their exertional oxygen needs, such as travel and activities of daily living.[2-4]
Your prescription will determine how many flow settings you will need on your POC. Learn more about oxygen flow rate and always talk with your clinician about which oxygen delivery device is appropriate for your medical needs.
3) What is the smallest, lightest, and quietest POC on the market?
Many oxygen therapy patients in the POC market have portability in mind, so naturally, they want a device that is as small and lightweight as possible while still meeting their oxygen therapy needs. Noise is also a concern, especially for patients who require oxygen therapy while sleeping.
Advances in oxygen concentrator technologyover the years have led to smaller, lighter, and quieter POCs. In today’s diverse market, patients will encounter devices with similar sizes, weights, and noise ratings. Therefore, POC users and their care providers must consider a combination of the patient’s oxygen therapy requirements with their lifestyle and individual needs when choosing a POC.
Currently marketed POCs are compact and lightweight, with many devices weighing under 5 pounds — for example, the Inogen® Rove 6™ and Inogen® Rove 4™ are small, lightweight, and quiet POC options. Both operate at around 39 dBA (on pulse-dose Setting 2), which is considered “whisper-quiet” across the industry and makes them suitable for use at night or in quiet environments, such as offices and airplanes.
Patients with active lifestyles and those who travel frequently may find a POC like the Rove 4™ to be a good choice, weighing just 2.9 pounds with the standard battery.
When choosing a POC, consider balancing size and weight against other priorities, like battery life or ergonomic design.
4) How many hours does a POC battery last on one charge?
POCs run on battery power, so ensuring long battery life and easy recharging is top of mind for many POC users. Those who travel frequently may be particularly concerned about their device’s battery life.[1]
Many POCs offer a standard battery and an extended battery option, providing flexibility and freedom to spend hours away from a power source. For example, the Inogen® Rove 6™ and Rove 4™ POCs come with standard (8-cell) and extended (16-cell) battery options. Using the Rove 6™ with the extended battery allows you up to 12 hours and 45 minutes of battery run time on flow setting 1 and up to 10 hours and 15 minutes on flow setting 2 before needing to recharge.
A POC with long battery run time may be a good choice for patients with active lifestyles who need a concentrator that can last for extended periods of time. Keep in mind that extended batteries tend to be heavier than standard batteries, but if a patient is capable of carrying slightly more weight, they may benefit from the longer battery life that extended versions offer.
Every portable oxygen concentrator (POC) delivers oxygen at specific flow settings, and each model has its own range. It’s important to work with your healthcare provider to choose a device that can meet the flow setting they have prescribed. Battery life varies by device, flow setting, and battery size — higher flow settings drain the battery faster. If you usually use a moderate setting, you may want a POC that offers longer battery life at those levels. Always check the manufacturer’s listed flow settings (shown in liters or milliliters per minute) and the expected battery run times for the device you’re considering—like the chart below for the Inogen® Rove 6™. From this chart, you will find that the Rove 6™ lasts up to 6.25 hours on a standard battery and 12.75 hours on an extended battery when running at the lowest flow setting.
Inogen Rove 6™ Flow Setting and Battery Life
Flow Setting (mL/breath ± 15% per ISO 80601-2-67)
Inogen® Rove 6™
Standard Battery (8-Cell)
Extended Battery (16-Cell)
Setting 1 (210 mL/minute)
6 hrs. 15 mins
12 hrs. 45 mins
Setting 2 (420 mL/minute)
5 hrs.
10 hrs. 15 mins
Setting 3 (630 mL/minute)
3 hrs. 15 mins
6 hrs. 30 mins
Setting 4 (840 mL/minute)
2 hrs. 15 mins
5 hrs. 15 mins
Setting 5 (1050 mL/minute)
1 hr. 45 mins
3 hrs. 30 mins
Setting 6 (1260 mL/minute)
1 hr. 15 mins
2 hrs. 30 mins
Tips to Remember About POC Battery Life
Here are several factors that will impact how long your POC battery will last on a single charge:
Battery options can vary widely based on the type of portable oxygen concentrator, the brand, and the model you use.
Battery life depends on your flow settings. Higher settings providing greater oxygen flow rates require more battery power; the higher the flow setting, the faster your battery will be drained.
Battery life also depends on how long you use the portable oxygen concentrator per session throughout the day. The more often you need oxygen therapy sessions, the faster you will use your battery. However, it’s important to consider that you may not use it all up in one session.[2]
Batteries naturally lose capacity over time. Older batteries don’t last as long as new ones. Extreme heat or cold can also reduce their performance. All Inogen batteries have an expected service life of 500 cycles.
Many POCs today are user-friendly and feature LCD screens that show vital information, such as battery level and flow setting. Users may benefit from a device with large buttons that make it easy to turn the device on and off or change settings.
Some devices, such as the Inogen® Rove 6™, also include audible alarms and beeps to reassure the user that their device is functioning properly.
7) What features do POC apps offer?
If you value options for customizing or monitoring your device, look for POCs with Bluetooth connectivity and a dedicated app (such as the Inogen Connect™ app for compatible Inogen devices).
Apps offer many features and functions to enhance the experience of using a POC. For example, the Inogen Connect™ app allows you to monitor your device’s performance, including battery life and flow settings, without having to take it out of the case. It also offers reminders when cleaning or maintenance is required, stores your personal and insurance information, allows you to order new accessories or supplies, and gives access to product support guides and videos.
8) How long is the warranty?
This is an important question to ask when considering purchasing a POC. Manufacturer warranties for POC devices typically range from 3-5 years, while warranties for sieve beds and accessories can vary. You may also consider the lifespan of a POC, which varies from device to device.
For instance, the Inogen® Rove 6™ offers a 3-year warranty or an optional lifetime warranty for the concentrator and a 1-year warranty for the sieve beds and accessories. It has an expected lifespan of around 8 years.
9) Maintenance & Parts Replacement
POCs require routine upkeep, including regularly cleaning filters and replacing parts like the nasal cannula, tubing, and sieve beds/columns. Sieve beds/columns typically need to be replaced every 12 months and, depending on the device, may be able to be swapped out at home without sending the device back to the manufacturer. Look for devices that make the replacement and maintenance of these parts simple and easy.
Some devices, such as the Inogen® Rove 4™ and Inogen® Rove 6™, have a blue-tooth enabled app to alert you in advance when you need to replace the sieve beds/columns and allow you to replace them yourself, without having to send your POC back to the manufacturer. It typically takes users around 30 seconds to remove the old column. Learn more about POC replacement partsand maintenance.
After talking with your healthcare provider about what type of oxygen delivery system is appropriate for your medical needs, patients in the market for a POC should consider their priorities and what type of POC will best meet their needs. Explore Inogen’s full range of portable oxygen concentratorsand accessoriestoday.
References
Hardavella et al. Oxygen devices and delivery systems. Breathe (Sheff). 2019 Sep;15(3):e108-e116. doi: 10.1183/20734735.0204-2019. PMID: 31777573; PMCID: PMC6876135.
Shebl E, Modi P, Cates TD. Home Oxygen Therapy. 2023 Jul 3. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan–. PMID: 30422587. Available from: https://www.ncbi.nlm.nih.gov/books/NBK532994/
Jacobs SS, Krishnan JA, Lederer DJ, et al. Home oxygen therapy for adults with chronic lung disease: An official ATS clinical practice guideline. Am J Respir Crit Care Med. 2020;202(10):e121–e141. doi: 10.1164/rccm.202009-3608ST
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