No, Inogen does not have continuous flow options for their portable oxygen concentrators. Krista Elkins, paramedic and registered nurse, explained the difference between intermittent and continuous flow: “Intermittent flow tends to be more efficient, and the oxygen will last longer than continuous flow because the oxygen is not free flowing. Rather, it is delivered based on the person’s inherent breathing rate. In other words, intermittent is on-demand.”