Customer Reviews of the Inogen One G4

Reviews of the Inogen One G4 Concentrator
Inogen One G4 Concentrator
Manufacturer: Inogen
Sku: IS-400
Unit Overview:
  • Pulse Dose Settings of 1-5
  • 2.8 Pounds with 4 Cell Battery
  • 2.2 Hour Battery Life with 4 Cell Battery
  • Includes the G4 unit, 4 cell battery, AC power supply, DC power cable, carry bag, carry strap, cannula and manual.

Customer Ratings and Reviews of the Inogen G4 Portable Oxygen Concentrator

Inogen One G4 Portable Concentrator Inogen One G4 Mobile Oxygen Concentrator


22 reviews


64% (14)


18% (4)


14% (3)


5% (1)


0% (0)

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  • Carol

    Initially i wanted to purchase a new… 2 people found this helpful

    Initially i wanted to purchase a new concentrator, but my timeframe did not fit the availability of a new one. The associate found a refurbished unit in stock that could be shipped quickly and this also saved me dollars. I am very happy with the unit and appreciate the help in getting what I needed in the time frame i needed..
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  • Jessie

    Easy enough for a 95 yr old 2 people found this helpful

    Didn't research a lot, just knew I was tired of the oxygen canisters. The oxygen concentrator has not only made my life easier but my 95 year old mother-in-law. She now has oxygen as she goes out of her room to visit others and eat her meals. Then when we venture out, our time is better spent together. When the machine is set up she only has to push the on/off button. TOOOO EASY!
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  • Jason

    Great service 8 people found this helpful

    Great service, package arrived on time. Only real complaint is the battery life, unit only comes with smaller battery doesn't really last 2 hour's as I was told. And with a 2,400.00 price tag honestly both size batteries should be included in the price of the unit. Not a almost 600.00 increase for a larger size battery.
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  • Gary Rowley

    Best experience ever! 2 people found this helpful

    Best experience ever with a supplemental oxygen source. I was looking for a replacement for Apria, Kaiser-Permanente’s supplier, and was bowled over by the professional, friendly and helpful staff at The Concentrator Store. I bought a Inogen G4 concentrator from Matthew Schock and it was a great experience. When I went in for a warranty service I was treated so well by the receptionist and service department that I couldn’t stop talking about it at dinner with friends. I won’t go anywhere else.
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  • Nanny

    Carry case 2 people found this helpful

    The unit is fabulous, the carry case is not. I was hoping they would design a new one with 2 handles.
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