The new redux edition NF-P14S 140mm fans feature a square frame, superior airflow, an industry grade SSO bearing, an MTBF rating of over 150,000 hours and a 6 year Noctua warranty. The NF-P14 redux are a proven premium choice that provides trusted Noctua quality at an attractive price point. The 1200RPM PWM version features Noctua’s proprietary NE-FD1 for automatic speed control, which allows to strike a perfect balance between high cooling capacity and low noise operation in each given situation.

Xtreme Systems User Review
"Simply put, Noctua did a splendid job and it's clear that all five are premium products, because they can barely be heard even with an open case and they perform excellent." Full review