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Inogen One® G3® (Certified Pre-Owned)
Price range: $1,150.00 through $1,250.00
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Affordable certified pre‑owned Inogen One G3, restored and factory‑tested
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Oxygen flow levels 1–5 with 90% ±5.5% / –3% concentration
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Ultra‑quiet operation at ≤ 39 dBA
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Up to ~4.7 hours runtime with standard battery (Setting 2)
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Fast replacement service: swap with another certified unit—no factory delays
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FAA‑approved; includes AC/DC power supplies and carry case
Refurbished Inogen One G3 (Certified Pre‑Owned) – Reliable, Proven, and Ready to Go
Affordable portable oxygen therapy you can trust—with fast-certified replacements when you need them.
The Refurbished Inogen One G3 Certified Pre‑Owned unit offers the same compact, lightweight, and efficient oxygen delivery that made the original G3 so popular at a lower price point. Each unit has passed comprehensive factory testing to meet or exceed manufacturer standards, ensuring reliability and safety for everyday use.
Key features include adjustable oxygen flow settings (1–5), stable oxygen concentration (90% ±5.5% / –3%), and a whisper-quiet sound level of 39 dBA or lower. On setting 2 with the standard battery, you can expect around 4.7 hours of continuous use, with recharging in approximately 4 hours.
In addition to its performance, purchasing a certified pre‑owned unit from us gives you a unique benefit: should you ever need service or a warranty repair, we can immediately replace your device with another certified unit—no factory wait time, which often takes 30 days or longer with new units.
Comparison Table: Inogen One G3 vs G4 vs SimplyGo Mini
| Feature | Inogen One G3 (Refurb.) | Inogen One G4 (Refurb.) | Philips SimplyGo Mini (Refurb.) |
|---|---|---|---|
| Flow Settings | 1–5 | 1–3 | 1–5 (pulse only) |
| Oxygen Concentration | ~90% ±5.5% | ~90% ±3% | ~90% ±3% |
| Runtime (Standard Battery) | ~4.7 hrs (Stg 2) | ~4 hrs | ~5 hrs |
| Dual Battery Option | Yes (up to ~9 hrs) | Yes (up to ~9 hrs) | No |
| Noise Level | ≤ 39 dBA | ≤ 38 dBA | ~41 dBA |
| Weight | ~4.8 lbs | ~3.9 lbs | ~5.4 lbs |
| FAA Approved | ✅ Yes | ✅ Yes | ✅ Yes |
| Run on AC/DC | Yes | Yes | Yes |
| Certified Replacement | ✅ Fast swap guaranteed | ❌ Repair delay | ✅ Fast swap guaranteed |
| Price | $1400 | $1120 | $1495 |
Specifications
Specifications
| Feature | Detail |
|---|---|
| Flow Settings | 1–5 |
| Oxygen Concentration | 90% ±5.5% / –3% at all settings |
| Sound Level | ≤ 39 dBA |
| Dimensions | 8.75″ × 3.0″ × 7.25″ |
| Weight (with double battery) | 5.95 lbs |
| Battery Duration | Up to ~4.7 h (Setting 2), up to ~9 h (double battery, Setting 1) |
| Battery Recharge Time | Approx. 4 hours |
| AC Power | 100–240 VAC, 50/60 Hz |
| DC Power | 13.5–15.5 VDC, 10 A max |
What's in the package?
1 x Inogen One G3 System Unit
Including: Concentrator, 1 x Lithium-Ion Battery 16-Cell, AC Power Supply, DC Power Cable (Car Charger), Carry Bag.
Battery Runtime — Inogen One® G3®
Assumptions: healthy battery, room temperature, standard nasal cannula, factory settings. Actual times vary with breathing pattern, altitude, ambient temperature, cannula length, and device/battery age.
Pulse Mode — Estimated Runtime
| Pulse Setting | 8-Cell Battery (BA-300) | 16-Cell Battery (BA-316) |
|---|---|---|
| 1 | ~6.0–6.5 h | ~12–13 h |
| 2 | ~4.5–5.0 h | ~9–10 h |
| 3 | ~3.0–3.5 h | ~6–7 h |
| 4 | ~2.0–2.5 h | ~4–5 h |
| 5 | ~1.5–1.8 h | ~3.0–3.5 h |
Battery Charging Time (reference)
| Charging Method | 8-Cell | 16-Cell | Notes |
|---|---|---|---|
| Via concentrator (AC 100–240 V) | ~3–4 h | ~6–8 h | Supports use-while-charging |
| Vehicle adapter (DC) | ~4–5 h | ~6–8 h | Time may increase if device is in use |
| External battery charger (G3) | ~2–3 h | ~4–6 h | Off-device charging for quick swaps |
Tip: For full-day mobility, rotate two batteries—one in use, one on the external charger—to minimize downtime.
Warranty & Replacement Advantage
– Moving into a new era of peace of mind, our certified pre‑owned machines carry the same performance expectations as new units—but if anything fails under warranty, we can swap your unit for another certified device immediately. No factory backlog, no factory delay of 3, 4 or even 30+ days.
Frequently Asked Questions (5)
1. How does a certified pre‑owned unit differ from a new G3?
✅ It performs to the same standard, but offers faster certified swaps for warranty issues—no long factory wait.
2. Is the oxygen flow and purity the same as a brand-new G3?
Yes, certified to deliver identical performance with flow settings 1–5 and concentration at ~90% ±5.5%.
3. What battery options and runtimes are available?
Standard battery gives ~4.7 hrs on setting 2. Upgrading to a double battery can extend operation to ~9 hrs at the lowest flow.
4. Is it FAA-approved for flights?
Yes, the Inogen One G3 is fully FDA‑compliant and approved for air travel.
5. What should I know about pre‑owned condition?
Units may show minor cosmetic wear, but all functional systems are restored and tested. We certify reliability and offer full support.
Product Documentation
| Weight | 4.8 lbs |
|---|---|
| Dimensions | 8.7 × 3.0 × 8.25 in |
| Condition | |
| Max Flow (LPM) | 5 |
| Warranty | |
| Operating Mode | |
| Battery Option |
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