The Concentrator probably helps you sleep without waking often. A lot like a CPAP machine, it gives you a constant, reliable Oxygen Supply. It is the frequent waking that is most damaging to your getting good rest. HBOT, Hyperbaric Oxygen Therapy is a completely different thing and can be very expensive. There are now smaller portable home use chambers, however they only provide a pressure increase of 4psi, the Concentrator would be of much greater aid for sleeping since the chamber O2 would be 4.14 psi O2 vs. 3.3 psi O2 in common air. I would vote for the Concentrator.