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The Inogen One G5 is the newest of Inogen's oxygen devices. The One G5 is a pulse flow portable oxygen concentrator (POC). The One G3 and One G4 came before the One G5, and all three of these devices are some of the best POCs money can buy. The easiest way to buy an Inogen device is to call LPT Medical at 1(800)-946-1201, but before you do, make sure you weigh all of your options!
