GentleTyphoon 120x120x25mm Silent Case Fan Series D1225C12B
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GentleTyphoon 120x120x25mm Silent Case Fan Series D1225C12B

$22.95
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GentleTyphoon 120x120x25mm Silent Case Fan Series D1225C12B 1450 RPM 894092001638 / 1850 RPM 894092001645 / 2150 RPM 840556104087 1450 RPM (Discontinued):  D1225C12B4A-52 is the OEM variant of the D1225C12B4AP-14 1850 RPM (Discontinued):  D1225C12B5AP-53 is the OEM variant of the D1225C12B5AP-15 2150 RPM:  D1225C12B6ZPAA6 this is a 4 Pin PWM model OEM = Original equipment manufacturer, no accessories or retail packaging included. The Gentle Typhoon adopts a completely new idea which undermines conventional fan design. Reduce fan noise by reducing the RPM of the fan (This is due to the fact that noise varies in proportion to revolutions to the power of six.) NIDEC SERVO engineers denied common sense during the development of the Gentle Typhoon, and applied their own modified version of a fluid dynamic analysis software to verify a multitude of design parameters. We found that noise could be lowered even at higher speeds as long as the propeller and fan case (venturi) were formed with so

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