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Like all new A-series fans, the NF-A15 and NF-A14 use a novel aerodynamic design measure called Flow Acceleration Channels that allows them to significantly improve the airflow to noise performance of conventional, uniform blade shapes. By speeding up the airflow at the crucial outer blade regions, Flow Acceleration Channels reduce suction side flow separation and thus lead to better efficiency and lower vortex noise.
All three fans employ the further optimised second generation of Noctua’s renowned, time-tested SSO bearing as well as Noctua’s AAO (Advanced Acoustic Optimisation) frames that feature integrated anti-vibration pads as well as Noctua’s proprietary Stepped Inlet Design and Inner Surface Microstructures, both of which further refine the fans’ performance/noise efficiency. Like all Noctua fans, the NF-A15 and NF-A14 have an MTBF rating of more than 150,000 hours and come with a full 6 years manufacturer’s warranty.