The Respironics Millennium M10 is the highest performing and most reliable high flow 10 LPM oxygen machine available. It reduces the delivery costs associated with 5+ LPM oxygen users. The M10 home oxygen concentrator to reduce the cost of providing oxygen at higher liter flow. It also has fewer parts than any other concentrator on the market. Fewer parts, combined with greater reliability, reduce your expenditures on unnecessary accessories. The Millennium M10 is the highest performing and most reliable high flow 10 LPM oxygen machine available.