Inogen One G3 vs. Respironics SimplyGo

There is no doubt that the Respironics SimplyGo and the Inogen One G3 are both great portable oxygen concentrators. However, with any medical device you want to be sure that you choose the right one for your needs. Portable oxygen concentrators are no exception. Here are some of the major features of both units and a comparison of how they stack up next to each other.

Respironics’ SimplyGo is 11.5 inches in its largest dimension and weighs 10 pounds and delivers up to 2 liters per minute of continuous flow oxygen. You can also choose from 6 different pulse dose settings. This makes the SimplyGo ideal for patients with higher oxygen requirements.

Furthermore, among its many accessories, the SimplyGo includes a wheeled cart for easy transportation. The battery life averages a respectable 3 hours and the unit has complete FAA approval for in-flight use. The average noise level is an extremely quiet 43 decibels, surprising for such a powerful workhorse. The SimplyGo also has a 3 year manufacturer’s warranty covering the unit.

In comparison, the Inogen One G3 portable oxygen concentrator is smaller and lighter than the SimplyGo, at about 6 pounds and under 9 inches in all dimensions. Although it has no continuous flow option, the G3 delivers oxygen via pulse dose at a choice of 5 settings. Furthermore, it boasts Inogen’s custom technology that automatically adjusts your oxygen dose to best complement your current breathing rate, whether you’re active or even sleeping. The battery life is the same as the SimplyGo, with an average of 3 hours of operation on a full charge. Like the SimplyGo, the G3 carries a 3 year manufacturer’s warranty. However, it is a bit quieter, producing only 39 decibels of noise. The G3 is also FAA approved for passenger flight use.

The choice between these two outstanding units really boils down to your individual oxygen requirements. For patients who don’t need continuous flow oxygen, the G3 offers a smaller size and a little more quiet. However, if you need an oxygen supply of up to 2 liters per minute, then the SimplyGo is a great choice. Although larger than the G3, it is still extremely portable and runs with less noise than a quiet conversation.

Specifications of the G3 and SimplyGo

Oxygen Settings
Pulse Dose
Continuous Flow and Pulse Dose

4.9 pounds with 8 cell battery
10 pounds with battery

8.75 inches Wide x 3 inches Deep x 8.25 inches High
11.5 inches Wide x 6 inches Deep x 10 inches High

Battery Duration
Setting of 1: 4.5 hours average (Setting of 1)
Setting of 1: 4 hours average (Setting of 2)
Setting of 1: 3 hours average (Setting of 3)
Pulse: 3 hours (Setting of 2)
Continuous: 1.6 hours

Battery Charging Time
Approximately 2-4 hours for 8 cell battery
About 2 to 3 hours from 0% charge to 100%.

Noise Level
Less than 39 decibels
Around 43 decibels at a setting of 2

Maximum Oxygen Output
1050 ml/min
2000 ml/min

FAA Approved

3 Year Warranty on Unit, 90 Day Warranty on Accessories
3 Year Warranty on Unit, 90 Day Warranty on Accessories

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