The NF-S12 is the first fan employing a novel rotor, which was developed by the Austrian Institute for Heat-Transmission and Fan Technology. Thanks to the special optimization of the blade geometry towards ultra low noise application, the NF-S12 is up to 10% more quiet than current high-end fans at the same flow rate. The NF-S12 series are also equipped with a magnetically centered, self lubricating oil-pressure bearing that provides a new level of quietness and long-term stability.