The Inogen At Home concentrator, weighing in at approximately 18 pounds, is one of the lightest home oxygen concentrators available, often coming in at half the weight of other home concentrators in use today. Moreover, the Inogen At Home is quiet, letting you watch television or visit with friends with very little noise disturbance. The Inogen At Home is also extremely energy efficient. At a flow setting of 2, it uses just 100W of energy, the same as a standard 100W light bulb.