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Inogen One G3 (Certified Pre-Owned)
The Inogen One G3 — five pulse settings up to 1,050 mL/min, whisper-quiet at ≤39 dBA, 4.8 lb, up to ~10 hours on a 16-cell battery. A genuine, proven Inogen concentrator, Certified Pre-Owned, FAA-approved & FDA-cleared.
From US$1,150 – US$1,250
✓ 1-Year Warranty by American Oxygen · plus immediate certified-unit swap if a covered issue arises — no 30-day factory wait.
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Call (786) 755-8063- 5 pulse settings (1–5) · up to 1,050 mL/min · 4.8 lb
- Up to 10h of battery (16-cell, setting 1)
- FAA-approved for air travel · FDA-cleared (prescription required)
- Genuine Inogen unit · Certified Pre-Owned · 1-Year Warranty by American Oxygen
The concentrator patients have relied on for years — at a lower price
The Inogen One G3 built Inogen's reputation: five pulse settings, whisper-quiet operation, and reliable oxygen therapy for daily life and travel. Certified Pre-Owned, it's a genuine G3 our technicians inspected and restored to manufacturer standards — and if a covered issue ever comes up, we swap it for another certified unit right away.
Genuine Inogen device. FAA-approved for air travel and FDA-cleared. Prescription required. 1-Year Warranty by American Oxygen.Why the Inogen One G3
At ≤39 dBA the G3 is quiet enough for offices, flights and quiet homes, with five pulse settings for everyday oxygen needs.
The Inogen One G3 has a long, dependable service record you can lean on — five pulse settings for everyday oxygen needs, now Certified Pre-Owned at a lower price.
If a covered issue arises, we replace your G3 with another certified unit right away — no 30-day factory wait that new units often require.
A genuine Inogen G3 that passed full inspection, cleaning and diagnostic testing, backed by a 1-Year Warranty by American Oxygen.
Battery runtime by setting
| Battery | Setting | Runtime |
|---|---|---|
| Single (8-cell) | 2 | ~4.7 h |
| Double (16-cell) | 1 | up to ~10 h |
Per-setting runtimes are American Oxygen estimates; Inogen publishes only the setting-1 maximum. Actual battery life varies with breath rate, altitude and battery age.
Details
Technical specifications
| Flow type | Pulse dose only (no continuous flow) |
| Flow settings | 5 (settings 1–5) |
| Max oxygen output | 1,050 mL/min (5-setting version) |
| Oxygen concentration | 90% ±5.5% / –3% across settings |
| Weight | 4.8 lb with single battery (double-battery weight not published by Inogen) |
| Dimensions | 8.25 (H) × 3.0 (W) × 8.75 (D) in with single battery; 7.25 in tall without battery |
| Battery options | 8-cell (single) or 16-cell (double) |
| Battery life | Up to ~4.7 h single / up to ~10 h double (16-cell) |
| Sound level | ≤39 dBA |
| Connectivity | No Bluetooth / app (earlier Inogen model) |
| Power | AC 100–240V · DC 13.5–15.5V vehicle adapter |
| Air travel | FAA-approved · FDA-cleared |
| Warranty | 1-Year Warranty by American Oxygen + immediate certified swap |
| Condition | Certified Pre-Owned — factory-tested & restored |
Warranty & condition
The Inogen One G3 Certified Pre-Owned is a genuine, pulse-dose portable oxygen concentrator with five flow settings (1–5), up to 1,050 mL/min, whisper-quiet operation (≤39 dBA) and about 4.8 lb of weight. With a 16-cell battery it runs up to roughly 10 hours, and it's FAA-approved for flights. Certified Pre-Owned means a previously used unit that American Oxygen inspected, cleaned, reconditioned and tested to manufacturer standards, backed by a 1-Year Warranty by American Oxygen — with an immediate certified-unit swap if a covered issue arises. Prescription required.
Frequently asked questions
What does “Certified Pre-Owned” mean for this G3?
How long does the battery last?
Can I fly with the Inogen One G3?
What happens if it needs warranty service?
Should I choose the G3 or the G4?
Do I need a prescription?
Not sure this is your setting? We'll help you choose.
Talk to a specialist — we'll confirm the right concentrator and flow for your prescription.
Call (786) 755-8063| Dimensions | 8.7 × 3.0 × 8.25 in |
|---|---|
| Condition | |
| Pulse settings | 5 |
| Warranty | |
| Operating Mode | |
| Battery Option |
3 reviews for Inogen One G3 (Certified Pre-Owned)
Genuine accessories for your device
Inogen One G3 Replacement Column Pair (RP-321)US$118.00
Inogen One G3 Intake Filter Assembly KitUS$26.00
Inogen One G3 Particle FilterUS$25.00
Output Filter Tool for Inogen One (RP-404)US$36.00
Inogen One G3 External Battery ChargerUS$289.00
Inogen One G3, G4, G5, Rove 4, Rove 6 & OxyGo NEXT DC Power CableUS$79.00
OxyGo NEXT DC Power CordUS$76.00
Inogen One G3 Battery 8-Cell (Certified Pre-Owned) Original price was: US$150.00.US$105.00Current price is: US$105.00.You may also like…
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Peter J. –
Good as new. Thank you
Peter J. –
Good as new. Thank you
Fred Johnson –
Best purchase I have ever made! Easy to use, and practically it doesn’t need any maintenance. I use it every day and it gives me the freedom I was looking for.