My question was - can any portable oxygen consentrator produce over 3 ltrs a minute ..
Overview

No, currently there are no portable oxygen concentrators (POCs) that can produce over 3 liters per minute of continuous flow oxygen. While some POCs offer higher settings in pulse flow (like the Inogen One G3 and Inogen Rove 6), the highest continuous flow output for a portable concentrator remains at 3 LPM. Just the fact .