The higher the outlet pressure, the longer the distance the oxygen compressor can adequately force oxygen on the affected person. Position 1st for oxygen outlet stress may be the Zen-O at 25 psi. The iGo is next at fifteen psi. DeVilbiss suggests applying only authentic DeVilbiss parts and filters as https://allhealthmarket.com/product/medical-supplies/portable-oxygen-concentrator-generator/oxygen-concentrator-machine-camping-use-oxygenator-driving-oxygen-bar-with-24-hours-battery-lasting-oxygen/