Inogen One G2 vs. Respirionics EverGo Concentrator Comparison

Many of our oxygen concentrators are similar or close to similar. With so many great portable oxygen concentrators to choose from, and with all of the great features and perks, it can be a hard decision. To help break down the information between the buyer's guides and reviews, we like to help make our customers' decisions a little easier by putting them next to each other.

You'll be able to see the differences in features, weight, size and the accessories that come with them. These two particular concentrators are nice and light but are still able to deliver plenty of oxygen in higher pulse dose settings. If you've narrowed your search down to these two lightweight, yet powerful little concentrators, read on to make your decision.

Size and Weight Comparisons

The G2 is 7.25 pounds, and the EverGo is 8.5 pounds. The G2 is a little lighter than the EverGo because the EverGo is accommodating for 1 pulse dose setting higher than the G2. With more settings and features usually comes more weight. Still, the EverGo isn't much heavier, and they are both nice and light and easy to carry around.

If you need a pulse dose setting of 6, or one is 0.5 increments, the EverGo would be the one you need between these two. If you need less than that, continue reading for the other comparisons.

The EverGo is 12, by 8.5 by 6 inches and is much like carrying around a handbag that is full of a few choice books. The G2 is 10.7, by 9.5, by 3.9 inches and is like carrying around a couple of encyclopedias stacked on top of each other. Both concentrators come with a wheeled cart and carry bag, although many people prefer to just use the carry bag because the concentrators are pretty light. We also want to accommodate for those with arthritis or back problems, so we include the cart as well in our standard packages.

Battery Duration and Charge Time

As always, how long the battery lasts depends on the setting at which your concentrator is running. On the highest setting, the EverGo's battery will last less than 1 hour at a time. On a setting of 2, it will last as long as 4 hours. This is why you will need extra batteries if you plan on traveling for more than just a few hours out of the day. It should take no longer than 3 hours to bring an EverGo battery from 0% to 100%.

The G2's 12 cell battery will last for 4 hours on the lowest setting and less than 1 hour on the highest setting. If you opt to include the 24 cell battery with your G2, you will get double the duration in just one battery. To charge a 12 cell from 0 to 100%, it will take no more than 4 hours. Double that time for a 24 cell. Both concentrators come with AC and DC power cords. We also offer external battery chargers that are compatible with each concentrator. These external battery chargers are convenient because you can have one battery already charged and ready to put in while you are out and about.

Educate yourself with our Free Oxygen Therapy Guide

Side-by-Side Unit Comparison

3.9 inches Wide x 10.7 inches Long x 9.5 inches High
6 inches Wide x 12 inches Deep x 8.5 inches High

7 pounds
8.5 pounds with a single battery

Oxygen Settings
Continuous flow: Not supported
Pulse dose: 1 to 6 setting
Continuous flow: Not supported
Pulse dose: 1 to 6 setting

Battery Duration
Up to 4 hours with 12 cell battery
Up to 8 hours with 24 cell battery
1 Battery: Up to 4 hours
2 Batteries: Up to 8 hours

Battery Charging Time
12 Cell Battery: 4 hours with AC or DC power
24 Cell Battery: 8 hours with AC or DC power
Approximately 2 to 3 hours for each battery from 0% charge to 100%

Noise Level
Less than 38 decibels
Around 43 decibels

Maximum Oxygen Output
1265 ml/min
Not available

FAA Approved

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

Have more questions about for these units?

About Scott Ridl: Scott joined American Medical Sales and Rentals in 2008 as a Web Manager and Content Writer. He is a writer and designer. He is extensively trained on oxygen therapy products from leading manufacturers such as Inogen, Respironics, Chart, Invacare, ResMed and more. Scott works closely with respiratory therapists and oxygen specialists to educate the community about oxygen therapy products, COPD, asthma and lung diseases. He writes weekly columns and is passionate about educating the community on oxygen therapy and respiratory issues.

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