-38%

Inogen At Home 5-liter stationary oxygen concentrator (GS-100), Certified Pre-Owned, front three-quarter view on a white background

Certified Pre-Owned Inogen At Home 5-liter oxygen concentrator (GS-100) with the American Oxygen Certified Pre-Owned quality seal

Close-up of the Inogen At Home control panel showing the power button, alarm indicator, flow settings 1 to 5, and the oxygen output port

Inogen At Home oxygen concentrator with humidifier bottle and tubing attached, showing the side air vents and rear power inlet

Free Shipping

Inogen At Home System (Certified Pre-Owned)

A Certified Pre-Owned Inogen At Home — genuine 5L continuous-flow home oxygen, 1 to 5 LPM, fully reconditioned and backed by a 1-year American Oxygen warranty.

Original price was: US$1,300.00.Current price is: US$810.00.

✓ Genuine Inogen · Certified Pre-Owned · 1-year American Oxygen warranty

In stock

Call (786) 755-8063

Certified Pre-OwnedGenuine InogenContinuous flow 1–5 LPM1-year AO warranty

1–5 LPMcontinuous flow

18 lbone of the lightest 5L

87–96%oxygen purity

1-yearAO warranty

1–5 LPMcontinuous flow

18 lbone of the lightest 5L

87–96%oxygen purity

1-yearAO warranty

Certified Pre-Owned Inogen At Home — genuine, reconditioned, function-tested
Continuous flow oxygen, 1–5 LPM (5 settings)
87–96% oxygen purity; 18 lb — one of the lightest, most efficient 5L home units
Runs 24/7 at home, including overnight; ~100 W at setting 2; worldwide 100–240V
1-year American Oxygen warranty · free U.S. shipping

Certified Pre-OwnedGenuine InogenContinuous flow 1–5 LPM1-year AO warranty

Secure checkout · financing available

VISAAMEXDISC●VERaffirm

Brand: Inogen
SKU: GS-100-NA-REFURB
Category: Stationary Oxygen Concentrator

CERTIFIED PRE-OWNED · GENUINE INOGEN · 1-YEAR AO WARRANTY

The Inogen At Home — real 5-liter home oxygen, certified and warrantied

A Certified Pre-Owned Inogen At Home: a genuine, FDA-cleared 5L stationary concentrator that delivers continuous-flow oxygen from 1 to 5 LPM — no tanks, no refills. Fully inspected and reconditioned by American Oxygen and backed by a 1-year warranty, for far less than a new unit.

Genuine Inogen · 1-year American Oxygen warranty · free U.S. shipping.

Why the Inogen At Home

Continuous flow, 1–5 LPM

True continuous-flow oxygen at five adjustable settings — the steady, higher-output therapy many home patients are prescribed, up to a full 5 liters per minute.

Light & remarkably efficient

At just 18 lb it’s one of the lightest 5L home concentrators, and one of the most energy-efficient — about 100 watts at setting 2. Quiet enough to sit beside you.

Certified Pre-Owned, warrantied

Inspected, reconditioned and tested by American Oxygen, then backed by a 1-year warranty — genuine Inogen performance without the new-unit price.

90% oxygen, every setting

The purity a home concentrator is built to deliver.

~90%O₂ purity

87–96% oxygen concentration across all five settings.

The At Home pulls oxygen out of the room air and concentrates it to medical-grade purity, holding it steady from setting 1 through 5 — the same concentration standard as when it was new.

Five continuous-flow settings

Adjustable from 1 to 5 liters per minute — set to your prescription.

1 LPM

2 LPM

3 LPM

4 LPM

5 LPM

Continuous flow, not pulse. Unlike a portable’s pulse-dose puffs, the At Home delivers a steady, uninterrupted stream of oxygen — the type of therapy typically prescribed for higher-need and overnight use. Always follow the flow setting your physician prescribes.

Light and quiet by design

Built to live in your home, not dominate it.

18 lbweight

LightHeavy for a 5L unit

~45 dBAsound at setting 2

QuietLoud

Auto-sensing 100–240V power means it runs anywhere in the world, and at about 100 watts on setting 2 it’s gentle on your electric bill for a 24/7 device.

Certified Pre-Owned — what that means

Used, reconditioned, and stood behind — not “as-is.”

1-yearAmerican Oxygen warrantyon this Certified Pre-Owned unit

Fullinspection & reconditioningtested to spec before it ships

Certified Pre-Owned means this is a genuine Inogen At Home that was previously owned, then inspected, serviced, and function-tested by our team — oxygen purity verified, sieve beds and filters checked, cosmetics cleaned up. It arrives ready to use and covered by a 1-year American Oxygen warranty. A smart way to get real Inogen home oxygen for far less than a new unit.

Real home oxygen, made to live with youQuiet, efficient and always on — the At Home settles into the room and does its job.

A home unit — not a travel unit

Know what the At Home is for.

The Inogen At Home is a stationary concentrator: it plugs into the wall and is designed to run continuously at home, including overnight, as prescribed. It is not a portable and is not meant for air travel. If you need oxygen on the go or on a plane, a portable oxygen concentrator is the right tool — American Oxygen carries several, and we’ll help you match the right one. Many patients keep an At Home for the house and a portable for leaving it.

Details

What’s included

Inogen At Home concentrator (Certified Pre-Owned, model GS-100)
AC power cord
Quick-start guide
1-year American Oxygen warranty

Cannula and humidifier bottle are simple add-ons — ask us and we’ll include what you need.

Certified Pre-Owned condition

A previously-owned genuine Inogen At Home, fully inspected, reconditioned and function-tested by American Oxygen. Oxygen purity is verified and the unit is cleaned and confirmed to perform to Inogen’s specification. Light cosmetic wear is normal; performance is not. Backed by our 1-year warranty.

Genuine Inogen & FDA-cleared

This is a genuine Inogen At Home (GS-100), an FDA-cleared oxygen concentrator. American Oxygen sells genuine Inogen equipment and stands behind every Certified Pre-Owned unit we ship.

Full specifications

Type	Stationary home oxygen concentrator
Oxygen delivery	Continuous flow
Flow settings	1–5 LPM (5 settings)
Oxygen concentration	87–96%
Weight	18 lb (8.2 kg)
Dimensions	16.5 in H × 13 in W × 7 in D
Sound level	~45 dBA (setting 2)
Power use	~100 W (setting 2); 275 W max
Voltage	100–240V, 50–60Hz (auto-sensing)
Model	GS-100 / GS-100-NA
Condition	Certified Pre-Owned
Warranty	1-year American Oxygen warranty

Frequently asked questions

Is this a new or used concentrator?

It’s Certified Pre-Owned — a genuine, previously-owned Inogen At Home that we’ve fully inspected, reconditioned and function-tested, then backed with a 1-year American Oxygen warranty. You get real Inogen home oxygen for much less than a new unit.

Do I need a prescription?

Oxygen concentrators are prescription medical devices. Have your prescription ready and follow the flow setting your physician prescribes. If you have questions about setup, our team is glad to help — but the therapy itself is directed by your doctor.

Is it continuous flow or pulse dose?

Continuous flow — a steady, uninterrupted stream of oxygen from 1 to 5 LPM. That’s different from a portable’s pulse-dose delivery and is the type of therapy typically prescribed for higher-need and overnight use.

Can I travel or fly with it?

No — the At Home is a stationary home unit that plugs into the wall, not a portable, and it isn’t made for air travel. For oxygen on the go or on a plane, you’ll want a portable oxygen concentrator. We carry several and can help you choose.

Can it run all day and overnight?

Yes. The At Home is built for continuous 24/7 use, including overnight, and it’s one of the most energy-efficient 5L concentrators — about 100 watts at setting 2.

What warranty comes with it?

A 1-year American Oxygen warranty on this Certified Pre-Owned unit. If anything isn’t right, call us and we’ll take care of you.