Noctua NF-A14x25 ULN 140mm Fan

Noctua NF-A14x25 ULN 140mm is a 140 mm case fan aimed at people who pursue the quietest machine possible, even at the expense of lower RPMs. The operating range of 650 – 800 RPM is deliberately limited for ultra-low noise, and the declared 11.9 dB(A) is in the zone of "barely audible, if at all". At the same time, it maintains a decent airflow of 79.8 m³/h, so your case doesn't overheat. Typical of Noctua, you get a reliable fan with a dynamic fluid bearing and a long lifespan.

What you get
This fan is designed for quiet, stable case ventilation, not for an aggressive airflow build. At 650 – 800 RPM, it moves enough air for a standard gaming or work configuration without raising the noise above the ambient level. With an airflow of 79.8 m³/h and static pressure of 0.69 mm H₂O, NF-A14x25 ULN performs best as an intake or exhaust fan without overly dense filters. The low consumption of just 0.36 W at 12 V and current 0.03 A practically doesn't load your power supply, even if you fill the case with a few of these. The 3-pin connector makes it suitable for motherboards with DC control, while an MTBF of 150,000 hours and 72 months warranty indicate that the idea is to install it and forget about it.

• 140 x 140 x 25 mm size provides a large blade that can move air effectively even at low speeds.
• The range of 650 – 800 RPM is optimized for quiet cooling without unnecessary RPM and noise increases.
• Airflow of 79.8 m³/h is more than sufficient for an intake or exhaust fan in a standard to quieter configuration.
• Maximum static pressure of 0.69 mm H₂O is mainly suitable for more open case vents, not for very dense radiators or filters.
• Ultra-low noise level of just 11.9 dB(A) makes it an excellent choice for a silent build, audio/streaming room, or office machine.
• Dynamic fluid bearing ensures smooth operation and long life with an MTBF of 150,000 hours.
• 3-pin connector and consumption of 0.36 W at 12 V and 0.03 A guarantee easy integration and minimal system load.

Who it is suitable for
NF-A14x25 ULN is for you if you are building a quiet or completely silent configuration – media center, office system, workstation for sound, or just a gaming case without a "turbine" inside. It is more suitable for airflow through the case than for heavy radiators with dense fins or aggressive overclock setups, where higher RPMs are needed.

The combination of ultra-low noise, stable airflow, and very long life makes this Noctua fan a logical choice if you prioritize silence above all else. You install it, set a light DC profile, and forget that you even have a fan in the case.