Noctua released this year a new air cooler aiming for the top, the NH-D15 G2 series that has a new tower design and of course, a new fan design. While the cooler uses a rounded design shape, Noctua wants the new air fan design to fit cases and water as well, and for that reason, it also introduces the NF-A14 G2 series.

The new series hosts a square-frame 140mm design that is made out of Sterrox LCP, its highly optimized Progressive-Bend impeller with winglets, Flow Acceleration Channels, and Centrifugal Turbulator hub combined with a tip-clearance of only 0.7mm allow the NF-A14x25 G2 to significantly improve its predecessor’s renowned quiet cooling performance. The new fan series took almost a decade of development and Noctua is very proud of its new design the results were confirmed from our NH-D15 G2 review since the product got a high score on our tests.

The new NF-A14x25 G2 can be used in all types of usage, regardless of whether it’s in low-impedance, airflow-oriented applications such as case cooling, or high-impedance, static pressure-demanding scenarios such as on heatsinks and water cooling radiators. For application-specific optimization, the NF-A14x25 G2 comes with an NA-AVG2-LR anti-vibration gasket pre-installed to create a tighter seal on radiators. Additionally, its AAO (Advanced Acoustic Optimisation) frame can be combined with the optional NA-IS1-14 inlet spacer, which can help to achieve superior suction acoustics and flow rates in challenging intake configurations.

The NF-A14x25 G2’s new ultra-low-loss etaPERF motor with Smooth Commutation Drive 2 technology doesn’t only provide unprecedented energy efficiency and running smoothness, but thanks to the new SupraTorque feature, it can also leverage extra torque headroom to keep the fan at its desired speed when working against back pressure, thereby ensuring even better performance on heatsinks and radiators.

The fan is available in a standard PWM version with 1500rpm maximum speed, an ultra-quiet LS-PWM version with up to 800rpm as well as in an Sx2-PP set that contains two fans that are offset in speed by +/- ~25rpm. This speed offset can be beneficial in push-pull operation as well as in situations where two or more fans are operating side by side, such as in case cooling applications or on 280mm water cooling radiators, in order to avoid periodic humming or other undesired acoustic interaction phenomena.

The new series also comes with Noctua’s SSO2 bearing, a good bundle of accessories, and a 6-year manufacturer’s warranty. Noctua lists the retail prices for all their product as follows

• NF-A14x25 G2 PWM: EUR 39.90 / USD 39.90
• NF-A14x25 G2 PWM Sx2-PP: EUR 76.90 / USD 76.90
• NF-A14x25 G2 LS-PWM: EUR 39.90 / USD 39.90

Product specifications

• NF-A14x25 G2 PWM
• NF-A14x25 G2 PWM Sx2-PP
• NF-A14x25 G2 LS-PWM

Further reading

• NF-A14x25(r) G2 performance: improvements for heatsinks, radiators and cases
• NF-A14x25(r) G2 aerodynamic design innovations: the keys to its superior performance
• Fan speed offset: Beat frequency theory and how to further optimise acoustics
• etaPERF™ fan motor: new standards in energy efficiency
• SupraTorque™: leveraging torque headroom to boost fan pressure performance