The DeVilbiss 525KS 5L O2 unit supplies a steady supply of medical air for home application . This system is particularly designed for people requiring a gentle output of up to 5 L per minute . https://devilbiss-525ks-5l-oxyge449319.jiliblog.com/98217197/devilbiss-525ks-5l-oxygen-concentrator-a-comprehensive-review