Certified according to the ISO 13485 quality management system for medical devices, Pentair also manufactures in accordance with the most stringent FDA requirements. The extended surface area of HEPA filter media removes more than 99.97% of particles 0.3 µm in size and larger, while maintaining low resistance to compressor air flow. This helps to maintain proper valve performance, extends molecular sieve life, and reduces sound levels for additional patient comfort. The filter media in the DFC series adequately protects the patient and the oxygen concentrator valves against contamination. The DFC series allows healthcare providers to deliver on the promise of high filtration efficiency, low pressure drops, and continuous high performance in protecting patients and respiratory equipment.