Noctua NF-S12 120mm x 25mm Silent Computer Fan - 8dB(A)
The NF-S12 is the first fan employing a novel rotor which was developed by the Austrian Institute for Heat-Transmission and Fan Technology
(Österreichisches Institut für Wärmeübertragung und Ventilatorentechnik, ÖIWV). Thanks to the special optimisation 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.
Self-stabilising oil-pressure bearing (SSO bearing): The NF-S12 series are equipped with a magnetically centred, self lubricating oil-pressure bearing that
provides a new level of quietness and long-term stability.
Specs: 800 RPM 8 dB(A) @ 35 CFM
Size 120x120x25 mm
Bearing SSO-Bearing
Blade Geometry Straight-Blade-Design
Rotational Speed (+/- 10%) 800 RPM
Rotational Speed with U.L.N.A. (+/- 10%) 500 RPM
Airflow 59 m³/h
Airflow with U.L.N.A. 34 m³/h
Acoustical Noise 8 dB(A)
Acoustical Noise with U.L.N.A. < 5* dB(A)
Input Power 0,60 W
Input Current 0,05 A
Voltage Range 6-13 V
MTBF > 150.000 h
Scope of Delivery Ultra-Low-Noise Adaptor (U.L.N.A.)
4 Vibration Compensators
3:4-Pin Adaptor
4 Fan Screws
Warranty 6 years
Noctua Straight Blade Desighn
Current silent fans frequently employ conventional blade geometries, which were developed for higher speed ranges and significantly lose efficiency at lower
rotation speeds. The Noctua Straight-Blade-Design of the NF-S12 series was developed by the Austrian Institute for Heat-Transmission and Fan Technology
(Österreichisches Institut für Wärmeübertragung und Ventilatorentechnik, ÖIWV) and specifically tailored to 120mm fans with extremely low rotation speeds.
The result is a performance improvement of up to 10% and more compared to conventional blade geometries.
The Straight-Blade-Design of the NF-S12 series provides the maximum efficiency of a straight fan blade without the drawback of higher noise emission,
which arises when straight blades are used at higher rotation speeds. At the low rotation speeds of the NF-S series, the Noctua Straight-Blade-Design
achieves a significantly higher flow rate than forward or backward swept blade designs. Furthermore, among other measures to prevent vortices like the
rounded rotor hub, the distance between rotor and stator (tip clearance) was increased in order to reduce the problem of tip vortices which plays an
important part in the noise emission of axial fans. With its fan blade exactly tailored to ultra low noise application, the NF-S12 series is significantly more quiet
than other high end silent fans.
Mag. Manfred Stadler MBA of the Austrian Institute for Heat-Transmission and Fan Technology (Österreichisches Institut für Wärmeübertragung und
Ventilatorentechnik, ÖIWV) about the development of the Noctua Straight-Blade and Raised-Blade-Designs:
"In the area of PC cooling, the last years saw a growing demand for axial fans with the lowest possible noise emission, which manufacturers mostly met by
simply reducing the RPM of existing models without sufficiently adapting the blade geometry and profile to the modified fluid dynamic parameters. The
comparison of measured data and simulation outputs showed that the result was an average deficit of efficiency of 10-15%. The complete redevelopment of
the blade geometry and profile was carried out with exact fluid mechanical adjustment to minimal noise emission in a speed range of 400-1800RPM at a
height of 25mm and a radius of 40 and 60mm. Both fan blades possess 8-12% more flow rate than comparable products at the same total noise emission
and static pressure." (Mag. Manfred Stadler MBA, Austrian Institute for Heat-Transmission and Fan Technology (Österreichisches Institut für
Wärmeübertragung und Ventilatorentechnik, ÖIWV))
The NF-S12 is the first fan employing a novel rotor which was developed by the Austrian Institute for Heat-Transmission and Fan Technology
(Österreichisches Institut für Wärmeübertragung und Ventilatorentechnik, ÖIWV). Thanks to the special optimisation 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.
Self-stabilising oil-pressure bearing (SSO bearing): The NF-S12 series are equipped with a magnetically centred, self lubricating oil-pressure bearing that
provides a new level of quietness and long-term stability.
Specs: 800 RPM 8 dB(A) @ 35 CFM
Size 120x120x25 mm
Bearing SSO-Bearing
Blade Geometry Straight-Blade-Design
Rotational Speed (+/- 10%) 800 RPM
Rotational Speed with U.L.N.A. (+/- 10%) 500 RPM
Airflow 59 m³/h
Airflow with U.L.N.A. 34 m³/h
Acoustical Noise 8 dB(A)
Acoustical Noise with U.L.N.A. < 5* dB(A)
Input Power 0,60 W
Input Current 0,05 A
Voltage Range 6-13 V
MTBF > 150.000 h
Scope of Delivery Ultra-Low-Noise Adaptor (U.L.N.A.)
4 Vibration Compensators
3:4-Pin Adaptor
4 Fan Screws
Warranty 6 years
Noctua Straight Blade Desighn
Current silent fans frequently employ conventional blade geometries, which were developed for higher speed ranges and significantly lose efficiency at lower
rotation speeds. The Noctua Straight-Blade-Design of the NF-S12 series was developed by the Austrian Institute for Heat-Transmission and Fan Technology
(Österreichisches Institut für Wärmeübertragung und Ventilatorentechnik, ÖIWV) and specifically tailored to 120mm fans with extremely low rotation speeds.
The result is a performance improvement of up to 10% and more compared to conventional blade geometries.
The Straight-Blade-Design of the NF-S12 series provides the maximum efficiency of a straight fan blade without the drawback of higher noise emission,
which arises when straight blades are used at higher rotation speeds. At the low rotation speeds of the NF-S series, the Noctua Straight-Blade-Design
achieves a significantly higher flow rate than forward or backward swept blade designs. Furthermore, among other measures to prevent vortices like the
rounded rotor hub, the distance between rotor and stator (tip clearance) was increased in order to reduce the problem of tip vortices which plays an
important part in the noise emission of axial fans. With its fan blade exactly tailored to ultra low noise application, the NF-S12 series is significantly more quiet
than other high end silent fans.
Mag. Manfred Stadler MBA of the Austrian Institute for Heat-Transmission and Fan Technology (Österreichisches Institut für Wärmeübertragung und
Ventilatorentechnik, ÖIWV) about the development of the Noctua Straight-Blade and Raised-Blade-Designs:
"In the area of PC cooling, the last years saw a growing demand for axial fans with the lowest possible noise emission, which manufacturers mostly met by
simply reducing the RPM of existing models without sufficiently adapting the blade geometry and profile to the modified fluid dynamic parameters. The
comparison of measured data and simulation outputs showed that the result was an average deficit of efficiency of 10-15%. The complete redevelopment of
the blade geometry and profile was carried out with exact fluid mechanical adjustment to minimal noise emission in a speed range of 400-1800RPM at a
height of 25mm and a radius of 40 and 60mm. Both fan blades possess 8-12% more flow rate than comparable products at the same total noise emission
and static pressure." (Mag. Manfred Stadler MBA, Austrian Institute for Heat-Transmission and Fan Technology (Österreichisches Institut für
Wärmeübertragung und Ventilatorentechnik, ÖIWV))
Sound-Optimized Blade Geometry
Noctua 120mm Silent Computer Fan
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