My wife is on oxygen 24/7. She has two Inogens. They are terrific.
When she first started oxygen, she barely left the house because of the hassle of managing tanks. With the portable concentrator, she pretty well goes wherever she wants.
There are two kinds of oxygen supply: continuous flow, and pulse. Most oxygen tanks are continuous flow. Oxygen is supplied at a continuous rate, often 2 liters per minute. The Inogens are pulse systems. They sense when you inhale, and release a little pulse of oxygen at just the right moment. Pulse systems use far less power, and so can easily run on batteries. The downside is that they are not compatible with CPAP machines.
You can get a pulse regulator for an oxygen tank. We have one, which we keep for backup. With that, the little shorty oxygen bottles last about 8-10 hours instead of just 2. That's an improvement, but the Inogens are far better.
I think we paid about $1850 for each of our Inogens.
Last edited by denton; 09/30/21.
