Inogen One G4 Portable Oxygen Concentrator (Pulse Dose)

$2,744.00$3,292.00SAVE $548.00
In Stock
4 Cell Battery
8 cell battery+$204.00
Please choose a Battery.
Email Me When Available

Starting at $249/mo with affirm icon. Prequalify now

Free Shipping
Prescription Required

  • Inogen G4 Portable Oxygen Concentrator
  • Rechargeable Battery (single or double)
  • AC Power Supply
  • DC Power Adapter
  • Carrying Bag
  • User Manual

Inogen One G4 Portable Oxygen Concentrator

Built for an active and independent lifestyle, the Inogen One G4 Portable Oxygen Concentrator is one of the smallest, lightest, and quietest oxygen solutions out there. Equipped with Inogen’s Intelligent Delivery technology and various power options, the G4 offers worry-free therapy at home or on the road.

Easy-to-Carry Travel Companion
Weighing a mere 2.8 pounds, the Inogen G4 is lighter than your average laptop, making it easy to bring wherever life takes you. This portable oxygen concentrator is roughly 6 inches long and less than 3 inches wide, small enough to fit in the included carry bag, your purse of choice, or on your lap. 

Library-Quiet Operation
Rated at 40 decibels (at flow setting 2), the G4 is as unobtrusive as the hushed whispers in a library. Whether you’re going on a stroll or traveling on a plane, this FAA-approved oxygen concentrator discreetly blends into your lifestyle. 

Long-Lasting Battery
On a single charge, the lithium-ion G4 Single Battery can provide up to 2.7 hours of use at flow setting 1. You also have the option to extend its runtime with the G4 Double Battery, which lasts up to a whopping 5 hours.

Multiple Power Options for the Utmost Freedom
With the Inogen One G4, you won’t have to worry much about power safety or charging the batteries. Plug it into any wall outlet or charge it in the car — the G4 is equipped with an auto-sensing 100-240V AC power supply for worldwide use and a DC power adapter for mobile use. If you prefer to charge the batteries separately, make sure to use the optional external battery charger.

Efficient Oxygen Delivery
Breathe easy and experience personalized oxygen therapy with the G4 intelligent pulse dose delivery system. This advanced technology adapts to your unique breathing patterns, sensing each breath and delivering 87%-96% pure oxygen at the right time. Not only does it maximize comfort with each inhalation — it also conserves the battery life for longer unplugged operation. 

User-Friendly Interface
New oxygen concentrator users will have an easy time navigating their therapy, thanks to the G4’s intuitive control panel. The backlit LCD screen displays the unit’s battery life and current flow setting, while the large buttons let you adjust flow settings and toggle the audible alert. On top of the audible signals, the G4 also comes with light indicators to signal any changes in the device’s status.  

Remote Monitoring
With the Inogen Connect mobile app, you’ll have the real-time status of your device right at your fingertips. Simply pair the G4 with your phone via Bluetooth. Then, on the app, you can easily check the battery life, maintenance schedule, current flow settings, hours of use, and more.

The Inogen One G4 Portable Oxygen Concentrator itself comes with a 3-year manufacturer warranty. The sieve beds, batteries, and other accessories are covered by a 1-year limited warranty. 

Oxygen Flow Setting Specifications

Nominal pulse volumes at 20 breaths per minute:

Flow Setting 1: 10.5 ml NPV with 210 ml/min maximum output
Flow Setting 2: 21 ml NPV with 420 ml/min maximum output
Flow Setting 3: 31.5 ml NPV with 630 ml/min maximum output

Battery Duration

Battery duration listed below are approximate values. Battery duration is affected by a number of factors including operating temperature, battery age, altitude etc. 

Setting 1
Single Battery: 2 hours 40 minutes
Double Battery: 5 hours

Setting 2
Single Battery: 2 hours 15 minutes
Double Battery: 4 hours 30 minutes

Setting 3
Single Battery: 1 hours 20 minutes
Double Battery: 2 hours 30 minutes


How long does the Inogen G4 last?
The expected lifespan of the Inogen One G4 is 5 years. The sieve beds or metal columns last 1 year, while the batteries have a life expectancy of 500 full charge/discharge cycles.

How long can the Inogen G4 run continuously on battery power?
The Inogen G4 single battery can last up to 2.7 hours on a full charge at flow setting 1. The Inogen G4 double battery can last up to 5 hours under the same conditions. 

How long is the charging time?
The charging time is up to 3 hours for the Inogen G4 single battery and 5 hours for the double battery. 

How do I connect the Inogen G4 to the app? 
Please follow the instructions in the Inogen Connect: Getting Started Guide. The provider code you’ll need to connect the machine to the app is 30-F80-11-222.

Can I use the Inogen G4 while sleeping?
Yes, the Inogen One G4 is built for 24/7 use, including during sleep. Its Intelligent Dose Delivery Technology increases the amount of oxygen in each pulse as breathing rate slows.

Can I use the Inogen G4 with my CPAP or BiPAP machine?
No, the Inogen G4 is not designed to be used in conjunction with any devices including CPAPs, BiPAPs, nebulizers and humidifiers. 

What is the longest nasal cannula I can use with the Inogen G4?
The G4 concentrator is designed to be used with nasal cannulas up to 25 ft. in length. Swivel connectors are not recommended as they can limit the amount of oxygen flow.

Can I use the Inogen G4 on the plane? 
The Inogen One G4 is FAA-approved for use onboard commercial aircraft. Some airlines may allow you to power the G4 using onboard electrical power, but availability varies. Contact the airline at least 48 hours in advance to confirm and inquire about their specific requirements. If onboard power is unavailable, bring enough batteries to last at least 150% of your flight duration.

Does Inogen One G4 have a continuous flow mode?
No. The Inogen G4 only offers 3 pulse dose settings. 

How do I clean and maintain the Inogen One G4?
Case: Wipe the exterior of the Inogen One G4 using a clean cloth dampened with mild soap and water. 
Filter: Clean the particle filter with mild soap and water at least every week. Rinse thoroughly and dry before use. 
Sieve beds or columns: Replace the sieve beds every year. The Inogen G4 will alert you 30 days before the sieve beds need to be replaced. 
Batteries: Store the batteries with 40 to 50% charge in a cool, dry area when not in use. If you have multiple batteries, rotate their use regularly and avoid leaving them unused for over 3 months. 

Learn more about how to clean oxygen concentrators and supplies

Can I leave the Inogen G4 plugged in all the time?
Yes. Leaving the Inogen G4 plugged in with fully charged batteries will not damage the unit or batteries. Make sure to follow the manufacturer’s instructions on battery maintenance, routinely check the batteries, and replace them as needed. 

What is the warranty period for the Inogen One G4?
The Inogen One G4 includes a 3-year standard warranty. The sieve beds, batteries, and other accessories are covered by a 1-year limited warranty. 

ModelIS-400-NA, IS-400-NA8
HCPCS CodeE1390, E1392
AC Power Supply Weight0.85 lb (approx)
Oxygen Delivery SettingsPulse dose settings 1-3 (up to 630 ml/min)
Basic Features
Warranty3-Years Manufacturer Warranty
Sound/Noise Level40 dBA at setting 2
Carrying CaseYes, included
Expected Service Life5 Years
FiltersReusable Particle Filter, Output Filter
Operation ModesPulse Dose 1-3
Oxygen Purity87% to 96% at all flow settings
Battery Warranty1 Year
Dimensions(LxWxH) With Single Battery: 5.91" x 2.68" x 7.20", With Double Battery: 5.91" x 2.68" x 7.79"
Weight with BatteryWith Single Battery: 2.80 lb, With Double Battery: 3.25 lb
Power Features
AC Input100-240 VAC, 50/60 Hz
AC Power Supply100 to 240 VAC, 50-60Hz, Auto-Sensing 1.0A
Power Cord LengthAC: 12 ft 10 in (approx), DC: 7 ft 8 in (approx)
DC ConverterIncluded, 13.5-15.5V, 10A Max
Battery OptionSingle (4-cell), Double (8-cell)
Battery DurationSingle Battery: up to 2.7 hrs; Double Battery: up to 5 hrs
Battery RechargeSingle: up to 3 hrs, Double: up to 5 hrs
Additional Features
Altitude AdjustmentUp to 10,000 Feet
Software Features
Smartphone AppInogen Connect (Android/iOS)

Questions? Ask here. We typically respond within 12-24 hours, often sooner. You'll receive email notifications once answered.
1–2 of 2 Questions
Q. Does anyone make a light weight portable continuous flow oxygen concentrator
A. The lightest one we have is the SimplyGo which delivers up to 2 LPM continuous flow, at 10lbs.
Q. why cant i order parts
A. Hi there, unfortunately we no longer carry this product, and have no parts available for this reason. You may need to reach out to the manufacturer for parts.

Here is their website: https://www.inogen.com/
Showing 1 to 2 (of 2 questions)

Share your review with our customers and earn $2.00 worth of points!