The Cirrus 5 is one of the newest, smallest, and quietest Stationary Concentrators available on the market today. It is easy to use, provides up to 5 LPM of stationary, therapeutic oxygen and is virtually maintenance free. The Oxygen from the concentrator is made by extracting oxygen from the atmospheric air. It uses an electrically-powered molecular sieve to separate nitrogen from ambient air. The oxygen concentrator can supply a patient with steady oxygen in a safe, reliable, low cost, adjustable flow.