
NF-A14x25 G2 LS-PWM
Next-gen 140mm fan
Next-gen 14cm design
For unprecedented quiet cooling performance
State-of-the-art engineering
Progressive Bend impeller, Sterrox® LCP material & ultra tight tip clearance
4-pin, low-speed version
Ideal for semi-passive setups
Variant:

Progressive Bend impeller
The NF-A14x25 G2 features a unique Progressive-Bend impeller with Flow Acceleration Channels and winglets. Its nine blades are swept backwards close to the hub and progressively bent forward further out. Working in tandem with the Centrifugal Turbulator hub, this design not only helps to push more air towards the outer blade areas where efficiency is higher but also assures maximum lift and near uniform loading across the entire blade span.

SSO2 bearing
The NF-A14x25 G2 features the further optimised second generation of Noctua's renowned, time-tested SSO bearing. With SSO2, the rear magnet is placed closer to the axis to provide even better stabilisation, precision and durability.

Ultra-tight tip clearance
The NF-A14x25 G2 has a record tight tip clearance (distance between the blade tips and the inside of the frame) of only 0.7mm. This highly ambitious design sets a new benchmark for 140mm fans and helps the NF-A14x25 G2 to work more efficiently against back pressure, such as on heatsinks or radiators, by reducing leak flows through the gap between impeller and frame.

Ultra-quiet low-speed version with PWM
Producing only 11.4 dB(A) at its 800rpm maximum speed and 8.6 dB(A) with the included Low-Noise Adaptor, the LS-PWM version is ideal for serious silent-enthusiasts: An ultra-quiet low-speed fan that supports PWM control for advanced acoustic fine-tuning!



Further resources
Want to know more on this topic? Explore relevant articles and resources.

NF-A14x25(r) G2 performance: improvements for heatsinks, radiators and cases
The next-gen NF-A14x25 G2 takes cooling performance to the next level, but what specific improvements can you expect to see compared to its predecessor?

G2 fan series aerodynamic innovations
Building on the technological innovations of the NF-A12x25, the G2 models represent a further refined, second-generation implementation of this design approach.

etaPERF™ motor
Smarter, quieter, more efficient: The etaPERF™ motor maximizes power with minimal energy loss, delivering superior performance and near-silent operation.

SupraTorque™
SupraTorque™ ensures Noctua fans don’t lose speed under pressure, improving cooling efficiency—especially in high-resistance setups.
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