Abstract: An electronic E-cylinder is provided which is small in size and allows for connection to a ventilator cart having a standard yolk structure which is known in the medical industry for connection of standard E-cylinders. The machine may have oxygen output of up to 10 liters per minute at greater than 40 psig and desirably about 50 to 60 psig. Additionally, the electronic E-cylinder provides a plug and play removable filtering module to remove nitrogen from a compressed air flow and store concentrated oxygen while exhausting the filtered nitrogen to atmosphere.