Inogen One G5 Portable Oxygen Concentrator vs Inogen One G3
The Inogen One G5 is the better buy for most shoppers who need more oxygen flow or longer battery life: it has 6 pulse settings versus 5 on the G3, and up to 13 hours on a double battery versus 9. The G3 is the lighter, cheaper-feeling option at 4.8 lbs with a single battery, but it tops out at setting 5. The G5's latest price was $1,899.00 on November 1, 2026, after a high of $2,225.00 on November 2; no current G3 price was provided, so compare store prices before deciding.
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Inogen One G5 Portable Oxygen Concentrator
4.5Choose the Inogen One G5 if you need 6 flow settings, quieter operation at 38 dBA, or the longest battery life for flights and full days out.
- 6 flow settings cover higher prescriptions
- Up to 13 hours on a double battery at setting 1
- Quieter at 38 dBA
- FAA approved and drop-tested
- Breath-sensing delivery praised by reviewers
- Heavier than the G3 with a double battery
- Prescription required
- Price swung from $1,899.00 to $2,225.00 in two days
What separates them
| Inogen One G5 Portable Oxygen Concentrator | Inogen One G3 | |
|---|---|---|
| Flow settings | 6 pulse settings (1-6) | 5 pulse settings (1-5) |
| Weight | 4.7 lbs (5.7 lbs with double battery) | 4.8 lbs with single battery |
| Battery life | Up to 13 hours at setting 1 with double battery | Up to 4.5 hours single, up to 9 hours double |
| Noise level | 38 dBA at setting 2 | 39 dBA (under 42 dBA at setting 2) |
| Oxygen purity | 90% +6%/-3% at all settings | 90% |
| Warranty | 3 years concentrator, 1 year sieve beds and accessories | 3 years standard |
| Display and controls | Inogen Connect app where available | Digital LCD with alarms and battery level |
| FAA approval |
Price history
- Inogen One G5 Portable Oxygen Concentrator: lowest $1,899.00 on Nov 1 at Order Your Supplies; $2,225.00 on Nov 2.
- Inogen One G3: lowest $1,899.00 on Nov 1 at My Medical Outlet.
Prices at every store
Inogen One G5 Portable Oxygen Concentrator
- DirectHomeMedicalCheck price at DirectHomeMedical
- Help Medical SuppliesCheck price at Help Medical Supplies
- Main Clinic SupplyCheck price at Main Clinic Supply
Inogen One G3
- Help Medical SuppliesCheck price at Help Medical Supplies
- My Medical OutletCheck price at My Medical Outlet
- o2assist.comCheck price at o2assist.com
Specs compared
| Spec | Inogen One G5 Portable Oxygen Concentrator | Inogen One G3 |
|---|---|---|
| Weight | 4.7 lbs (2.13 kg) | 4.8 lbs. (includes single battery) |
| Filter Type | Reusable Particle Filter, Output Filter | Molecular sieve |
| Power Source | AC power supply | AC power, Battery, DC power |
| Voltage | 100-240V (AC power supply) | 100-240V |
| Flow Rate | 1 to 6 (settings) | — |
| Oxygen Purity | 90% +6%/-3% at All Settings | — |
| Medical Use | Yes | — |
| Operating Mode Type | Pulse Dose | — |
| Oxygen Sensing | Yes | — |
| Safety Certifications | FAA Approved |
What reviewers say
Inogen One G5 Portable Oxygen Concentrator
Reviewers describe the Inogen One G5 as an excellent, easy-to-set-up portable concentrator, highlighting its quiet operation and breath-sensing oxygen delivery, with the backpack and double battery seen as worthwhile additions.
- Low noise
- Very easy setup
- Auto sense of breath timing delivers oxygen when inhaling
- Backpack leaves hands free and balances weight
Inogen One G3
Owners of the Inogen One G3 generally report it is light enough to carry and quiet enough for everyday use, and many praise the battery life for outings. Common complaints center on pulse-dose limits, battery replacement cost, and the price of accessories.
- Easy to carry at under 5 lbs
- Quiet operation
- Reliable battery life for errands and travel
- Simple controls and readable display
Questions and answers
- Which is better for air travel?
- The G5. It is FAA approved, has 6 settings and runs up to 13 hours on a double battery. The G3 is marketed for travel but lists only 9 hours on a double battery.
- Is the G5 worth the extra money?
- If you need setting 6 or long battery life, yes. The G5's latest price was $1,899.00 on November 1, 2026. Check the G3's current store price to see the gap.
- Which lasts longer on a battery?
- The G5, up to 13 hours at setting 1 with a double battery. The G3 gets up to 9 hours with a double battery and 4.5 with a single.
- Which is quieter?
- The G5 at 38 dBA at setting 2. The G3 is listed at 39 dBA, or under 42 dBA at setting 2.
- Do both need a prescription?
- Yes. Both are prescription oxygen therapy devices, so you need a valid Rx before ordering.
- Which is lighter to carry?
- The G3 at 4.8 lbs with a single battery. The G5 is 4.7 lbs bare but 5.7 lbs with a double battery.
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