The OG-15 is an industrial strength oxygen concentrator delivery oxygen from the ambient air with reduced risk of high-pressure cylinder oxygen. The air we breathe constitutes 21% of oxygen and OGSI Model OG-15 helps delivery of oxygen to any application. The innivative unit uses Pressure Swing Adsorption (PSA) technology to extract oxygen from the atmosphere and concentrates it to 93% (± 3%) purity for delivery. OG-15 provides 24 hours of operation with its completely self-contained designed features of internal air compressor, filtration system, zeolite sieve, surge tank, and flow control system. OG-15 is built on a powder coated steel chassis, its anodized aluminum sieve beds fitted with custom molded composite end caps for reliable service. An internal pressure of less than 9 psi is maintained with 0.3 hp compressor. OG-15 weighs 78 lb (35 kg) and used to deliver oxygen from the ambient air in many applications.