[Mike-G]

I am sorry but I inadvertrtently left out the fact that the best oxlife O2 concentrator is the Liberty 2. This was the only model which supposedly delivers up to 10 LPM.

[Mike-G]

As another participant stated, it depends on the LPM requirements. My prescription began with 3 LPM for continuous flow or 5 LPM for pulse, we selected the only portable on the market at the time which delivers up to 10 LPM. This is the O2 Oxlife. Again, they are all very expensive. If he is on medicare he might be eligible for a short term loaner or even qualify for them to provide it.