NF-A14 ULN:

The NF-A14 ULN is the lowest speed and lowest noise 140mm fan provided. It has a maximum speed of 800RPM, which can be cut down to 650RPM with the use of the include LNA.



Some of the fan's key specifications are listed below, and more information can be found at the official product page on the Noctua site.

Specifications:

» Size 140x140x25 mm
» Connector 3-pin
» Bearing SSO2
» Blade Geometry A-Series with Flow Acceleration Channels
» Frame Technology AAO (Advanced Acoustic Optimisation)
» Rotational Speed (+/- 10%) 800 RPM
» Rotational Speed with L.N.A. (+/- 10%) 650 RPM
» Airflow 79,8 m³/h
» Airflow with L.N.A. 66,4 m³/h
» Acoustical Noise 11,9 dB(A)
» Acoustical Noise with L.N.A. 9,1 dB(A)
» Static Pressure 0,69 mm H2O
» Static Pressure with L.N.A. 0,42 mm H2O
» Max. Input Power 0,48 W
» Max. Input Current 0,04 A
» Voltage 12 V
» MTBF > 150.000 h
» Scope of Delivery:
   » Low-Noise Adaptor (L.N.A.)
   » 3:4 Pin Adaptor
   » 30cm Extension Cable
   » 4 Vibration-Compensators
   » 4 Fan Screws
» Warranty 6 years

The image below shows the NF-A14 ULN in its case with the provided adapters and hardware.



Just like I discovered with the 120mm fans, after I tested the NF-A14 FLX with the ULNA as an intake fan, I realized that the NF-A14 ULN would be a much better choice for an intake fan, while leaving the NF-A14 FLX available to use elsewhere, like on a big old heatpipe tower CPU cooler. This system is currently using a Noctua NH-L9i CPU cooler, which works great, but there is really no need for a low profile cooler in a case with this kind of open volume.