Oxygen concentrators can provide up to 5LPM of oxygen to the user. These devices plug directly into an outlet and use tubing that attaches from the machine to the user using a nasal cannula. Oxygen concentrators can also be used with CPAP by connecting directly to the machine. O2 concentrators are often needed by older adults. These provide supplemental oxygen to the CPAP user and is often needed for those who have some type of pulmonary disease such as asthma, COPD, or emphysema. Users with low oxygen blood levels may also require O2 concentrators. We offer in-home as well as models that feature battery operated oxygen concentrator technology that can be taken on the go. We recommend speaking with your doctor about adding an O2 concentrator to your CPAP therapy regimen. We offer great products from both Philips Respironics and Precision Medical, both in home and battery operated oxygen concentrator models as well. Get yours today and start sleeping better.