A: Very easy. The g5 carry bag and lightweight form (just 4.7 pounds with a single or double battery) make it one of the best portable oxygen concentrators available, helping you move around effortlessly.
SKU: IS-500-NA8-OB
Inogen One G5 l Portable Oxygen Concentrator - Open Box | 8 Cell | IS
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$999.00
$1,999.00
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Size
If you're unsure about which size to choose, make sure to check out the CPAP mask size gauge. Using a size gauge can help you accurately measure your face and determine which size is the best match for you. Don't let an ill-fitting size hinder your CPAP therapy progress.
Key Features
- Description
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- Included Items
- Reviews 6
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Inogen One G5 Used Portable Oxygen Concentrator
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Note: This refurbished Inogen One G5 has been professionally cleaned, tested, and is fully functional.
May show minor signs of use, but works like new and offers reliable oxygen support.
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Affordable mobility for home use and travel
If you are looking for an affordable portable oxygen concentrator from a trusted brand, a used Inogen One G5 can be a smart option. The G5 is a lightweight pulse dose oxygen concentrator designed for people who want mobility for daily life, errands, and travel without the higher cost of buying new.
Buying used can be especially helpful if you:
ā¢ want a more budget friendly way to get started with a portable oxygen therapy device
ā¢ need a reliable backup unit for peace of mind
ā¢ prefer a compact oxygen concentrator that is easier to carry than traditional tanks
Who this used Inogen G5 is a good fit for
The Inogen One G5 is often chosen by:
ā¢ seniors who want easier day to day portability
ā¢ caregivers supporting mobility and independence
ā¢ COPD patients with a pulse dose prescription
ā¢ people who want an oxygen concentrator for travel and everyday errands.
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Key features of the Inogen One G5
Lightweight and portable design
The G5 is known for being comfortable to carry and simple to use. A used unit still offers the same portable form factor that made the model popular in the first place.
Pulse dose oxygen delivery with 6 settings
This is a pulse dose oxygen concentrator with six settings (1 to 6). It delivers oxygen when it senses inhalation. Many users prefer pulse dose for portability and efficiency.
Note: this model is not a continuous flow oxygen concentrator. If you need continuous flow, shop a continuous flow unit instead.
Battery options for flexibility
Battery performance can vary on used machines depending on battery age and usage, but the G5 is designed to work with:
ā¢ a single battery option for lighter everyday carry
ā¢ a double battery option for extended time away from home
If long run time is important, consider adding a new replacement battery so your setup feels more dependable.
Travel friendly oxygen solution
If you are shopping for an FAA approved oxygen concentrator, the Inogen One G5 is commonly used for air travel. Airline rules vary, so always confirm your carrier requirements and battery planning before your trip.
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Why buy a used Inogen One G5
More affordable than new
A used Inogen can be a great way to get a known, reliable model at a lower upfront cost. Many customers look for a used unit when price matters but they still want a portable oxygen concentrator that is widely supported with accessories.
Great option for a backup device
Some people choose a used G5 as a second unit for emergencies, travel days, or keeping one device in a common area of the home.
Strong accessory support
The G5 has widely available accessories like extra batteries, chargers, filters, and carry options. That makes it easier to maintain long term compared to less common models.
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What to expect when buying used
A used oxygen concentrator may show normal cosmetic wear. What matters most is that the unit is tested and operates properly. When you buy used, you should focus on:
ā¢ overall device condition
ā¢ what accessories are included
ā¢ battery condition and whether you want a new battery for best performance
ā¢ warranty or return options offered by the seller
If you want the most predictable experience, pairing a used unit with a new battery can be a simple upgrade.
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Looking for an affordable Inogen
If you want an affordable Inogen portable oxygen concentrator, this used Inogen One G5 is a practical option that balances portability, trusted performance, and value.
If you have questions about fit, accessories, or whether pulse dose vs continuous flow is better for your needs, open a chat with us and we will help you choose the right setup.
Related parts
| Model | IS-500-NA8, IS-500-NA16 |
| HCPCS Codes | E1390, E1392 |
| Color | White |
| Filters | Replaceable Particle Filter |
| Operating Modes | Pulse Dose |
| Altitude Adjustment | Auto-adjust up to 10,000 Ft |
| Sound Level | 38 dBA |
| Carrying Case | Included |
| FAA-Approved | Yes |
| Smartphone App | Yes (Inogen Connect) |
| Machine Size Only | Length: 7.19" Width: 3.26" Height: 8.15" |
| Weight with Battery | 4.77 lb |
| AC Input | 100-240 VAC, 50/60 Hz |
| AC Power Supply | 100 to 240 VAC, 50-60Hz, Auto-Sensing 1.0A |
| DC Converter | Included, 13.5-15.5V, 10A Max |
| Oxygen Purity | 87% +/- 6% |
| Battery Duration | Single: Up to 6.5 hours, Double: Up to 13 hours |
| Battery Recharge | Single: Up to 3 hours, Double: Up to 6 hours |
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Basic Features
HCPCS Codes
E1390, E1392
E1390, E1392
E1390 E1392
Color
White
White / Gray
Gray/White
Filters
Replaceable Particle Filter
Removable, reusable air inlet filter
Internal bacteria filter
Operating Modes
Pulse Dose
Pulse Dose
Pulse, Continuous, Sleep
Altitude Adjustment
Auto-adjust up to 10,000 Ft
Auto-adjust up to 10,000 ft
Up to 10,000 ft
Sound Level
38 dBA
~43 dBA (at setting 2)
ā¤ 43 dB at pulse setting
Carrying Case
Included
Included
Included
FAA-Approved
Yes
Yes
Yes
Smartphone App
Yes (Inogen Connect)
No (no mobile app connectivity)
No
Size And Dimensions:
Machine Size Only
Length: 7.19" Width: 3.26" Height: 8.15"
Length: 9.4 in Width: 5.9 in Height: 3.6 in
11.5 in Ć 10 in Ć 6 in
Performance:
AC Input
100-240 VAC, 50/60 Hz
100ā240V AC, 50/60 Hz
100ā240 VAC, 50ā60 Hz, 1.7 A max
AC Power Supply
100 to 240 VAC, 50-60Hz, Auto-Sensing 1.0A
External universal AC power supply (included)
19 VDC, 7.9 A max
DC Converter
Included, 13.5-15.5V, 10A Max
Yes (12ā16V DC vehicle power supply compatible)
Input: 11.5ā16 VDC, 18 A max Output: 19 VDC, 7.9 A max
Oxygen Purity
87% +/- 6%
87%ā96% at all settings (meets FDA requirements)
86%ā97% at all settings
Battery:
Battery Duration
Single: Up to 6.5 hours, Double: Up to 13 hours
Standard Battery: up to 4.5 hours (setting 2) Extended Battery: up to 9 hours (setting 2)
Battery Duration: 3.0 hours (pulse setting 2) and 0.9 hours (continuous flow 2 LPM)
Battery Recharge
Single: Up to 3 hours, Double: Up to 6 hours
Standard Battery: ~4 hours Extended Battery: ~6 hours
2-3 Hours (Typical Per Battery)
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FAQs
How easy is it to carry the Inogen One G5 Portable Oxygen Concentrator?
Very easy. The g5 carry bag and lightweight form (just 4.7 pounds with a single or double battery) make it one of the best portable oxygen concentrators available, helping you move around effortlessly.
Can I charge the Inogen One G5 overnight and how long does it take?
Yes. The ac and dc power options enable overnight charging without safety concerns. Typically, a single battery charges fully in about 3 hours, and a double battery in around 6 hours.
What maintenance is required for the Inogen One G5?
Regularly check and replace filters, keep vents clear, and follow the user manual for instructions. Clean the carry bag and unit exterior as needed, ensuring long-term performance.
When should I replace the battery?
Replace the battery if it no longer holds a sufficient charge or after approximately 500 cycles. You can order a new one through authorized retailers or Inogen directly.
Can I use the Inogen One G5 while driving?
Yes. Many users power the Inogen G5 via dc power in the car. Always secure the portable concentrator to prevent shifting during travel and refer to local regulations for safety guidelines.
How do I adjust the oxygen flow settings?
Simply press the control buttons to select your preferred flow setting (1 to 6). This allows you to match your doctor-prescribed oxygen requirements or adapt to changing activity levels.
Is there any noise level I should expect?
At lower oxygen flow rates, the G5 produces minimal soundāmaking it one of the more discreet units on the market. Pulse dose alerts or low oxygen notifications are typically soft, ensuring you wonāt disturb others.
How long do filters last in the G5?
Filters vary in lifespan based on usage and environment. Follow the user manual for replacing them every few months or as needed to maintain higher oxygen quality.
Whatās the warranty?
you get a 2-year warranty
What is the life expectancy of the Inogen One G5?
With proper care, many users operate their Inogen One G5 for around 5 years. This portable oxygen concentrator comes built for durability, ensuring long-term reliability for your oxygen therapy.
How long does the battery last on the Inogen One G5?
Single Battery: Provides up to 6.5 hours of use on a lower flow setting.
Double Battery: Offers up to 13 hours of use on a lower flow setting.