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Nine Blade Design

Many 140x140x25mm axial fans tend to suffer from low static pressure, making them less suitable for use on CPU coolers or watercooling radiators with tight fin spacing. The NF-P14 on the other hand features a highly optimised nine blade impeller design thatís following in the footsteps of Noctuaís successful NF-P12 and has been carefully fine-tuned for both airflow/noise efficiency and outstanding static pressure. As a result, the NF-P14 lends itself not only to use as a case fan but also to high-impedance applications like CPU cooling.

NF-P14 Blade Design


Thanks to the use of Vortex-Control Notches, an advanced design measure first introduced with the NF-P12 fan, the NF-P14 is surprisingly quiet despite of its impressive airflow and pressure performance. The two Vortex-Control Notches at the trailing edge of each blade make the flows along the suction and pressure side mix more smoothly, allowing for less turbulence and velocity loss, which leads to increased efficiency as well as a significant reduction in noise emission.

NF-P14 Blade Design


Vortex-Control Notches not only allow the flows to join less abruptly at the trailing edge, but also serve the purpose of psychoacoustic optimisation by making the fanís acoustic profile more pleasant to the human ear: Due to the Vortex-Control Notches, trailing edge vortices are split up into several smaller vortices, each having slightly different tonal characteristics. The fanís airflow noise is thereby spread over a wider range of frequencies and, as a result, perceived as much less annoying.

NF-P14 Blade Design


The Vortex-Control Notches' effect of psychoacoustic optimisation is further enhanced by the staggering of the notches. As the Vortex-Control Notches are staggered from blade to blade, each blade creates a different vortex pattern, which also helps to better spread the fan's noise emission over the frequency spectrum and thereby contributes to the fans unobtrusive acoustic profile that easily blends into the background noise.

NF-P14 Blade Design



More information:
button  120mm & 140mm Mounting
button  NF-P14 Metal Reinforcements




Noctua
16.09.2014 - HardwareHeaven.com NH-D15
Test verdict: "Excellent thermal performance, decent noise levels and great looks. The Noctua NH-D15 wins our performance award." (Stuart Davidson, HardwareHeaven.com)
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16.09.2014 - 4Tech.be NH-D15
Test verdict: "Noctua heeft met de NH-D15 weer laten zien dat het heer en meester is op het gebied van luchtkoeling. De NH-D15 weet ontzettend goede prestaties neer te zetten op zowel het gebied van koeling als geluidsproductie. Hij weet in ieder geval veel waterkoelsetjes te evenaren of zelfs voorbij te streven." (Henk van Hest, 4Tech.be)
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16.09.2014 - Hardware.Info NH-U14S
Test verdict: "Misschien wel dť verrassing van deze test: hoe kan een koeler die slechts 8 centimeter diep is vrijwel net zo goed koelen als gevaartes als de Noctua NH-D15? Deze Noctua U14S staat qua koelprestaties in de top 4, neemt niet veel plek in en is ook nog redelijk stil." (Koen Crijns, Hardware.Info)
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15.09.2014 - BigBruin.com NH-D15
Test verdict: "Considering that this cooler exceeded the cooling performance of the NH-U12S and the NH-U14S, and matched if not exceeded the low noise production of both, the Noctua NH-D15 heatpipe tower CPU cooler has to receive the Bigbruin.com 'Recommended' and 'Whisper Quiet' awards." (Richard Jackson, BigBruin.com)
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