Fan Noctua NF-A14 FLX 140 mm case fan, 25 mm thickness, 900–1200 RPM, 115.5 m³/h airflow, 13.8–19.2 dB

The Noctua NF-A14 FLX is a premium 140 mm computer fan with a square frame that follows Noctua’s AAO (Advanced Acoustic Optimisation) standard. Designed for use on watercooling radiators or as an upgrade for 140 mm case fans, it combines a 140 mm blade diameter with 124.5 mm mounting hole spacing and a compact 140 x 140 x 25 mm form factor. The fan operates at 12 V and delivers up to 1200 RPM for reliable airflow while maintaining low noise levels.

Advantages

The NF-A14 FLX incorporates advanced aerodynamic features such as Flow Acceleration Channels and a refined blade geometry to increase airflow and static pressure compared with earlier models. The FLX version includes Low-Noise Adaptors that allow fixed speed settings of 1200, 1050 and 900 RPM for flexible balancing between cooling performance and acoustic comfort. It uses Noctua’s SSO2 bearing and is manufactured to the brand’s premium quality standards for long-term smooth operation and durability.

Suitable for

• Mounting on watercooling radiators (140 mm spacing)
• Upgrading 140 mm case fans to reduce noise or increase airflow
• Systems requiring reliable, long-term continuous operation

Key specifications

• Model: Noctua NF-A14 FLX (MPN: NF-A14 FLX, EAN: 4716123314813)
• Fan diameter: 140 mm
• Dimensions: 140 x 140 x 25 mm
• Mounting hole spacing: 124.5 mm
• Operating voltage: 12 V
• Speed settings: 1200 / 1050 / 900 RPM (via Low-Noise Adaptors)
• Airflow: 115.5 m³/h
• Static pressure: 1.51 mmH2O
• Bearing: SSO2
• Type: Fan (computer cooling)

How to use

Install the NF-A14 FLX by aligning its 140 mm mounting holes (124.5 mm spacing) with corresponding radiator or case holes, then secure using appropriate screws. Connect the fan to a 3- or 4-pin header on the motherboard or to a fan controller, ensuring a 12 V supply. Use the supplied Low-Noise Adaptors to set the fan to 1200, 1050 or 900 RPM according to your desired balance of cooling and noise. Ensure the airflow direction matches your case or radiator cooling configuration.

Recommendations

For radiator installation prefer push or pull configurations based on your cooling setup and maintain unobstructed airflow paths. Use the lower RPM adaptors for near-silent operation in low-load systems and the 1200 RPM setting when higher static pressure is required for dense radiators. Periodically check and clean the fan blades to preserve performance.