This post was updated 8/22/16 to add more information and announce the Inogen One G4 is on sale!
Inogen is hands down one of the leading innovators in the oxygen industry. They sparked an oxygen therapy revolution with their first portable concentrator, the Inogen One and haven't looked back since.
Chances are, you have probably seen or heard of the Inogen One line of portable oxygen concentrators. Whether it's the Inogen One, the Inogen One G2, or the Inogen One G3 they are easily the most popular line of portable oxygen concentrators on the market and for a good reason. Inogen has cemented their spot in the industry as having the most durable and reliable units you can buy.