The best performing and quietest PC fans I've found : r/buildapc
NEW 1PCS 140mm pc case cooling fans 14cm computer Best silent quiet DC 12V 4D plug coolers 35000 hours Sleeve|fan 14cm|case cooling fancooling fan - AliExpress
Best 140mm Case Fans: Superb Airflow and Static Pressure - SegmentNext
Reviews of the Quietest and Best 140mm Case Fans in 2022
Arctic P14 Pressure-Optimised 140mm Case Fan - Black, Pack of 5 for sale online | eBay
Amazon.com: Corsair ML140 Pro, 140mm Premium Magnetic Levitation Cooling Fan (CO-9050045-WW) : Everything Else
CORSAIR LL Series 140mm Case Cooling Fan Kit with RGB lighting CO-9050074-WW - Best Buy
The 5 Best 140 mm Case Fans in 2022 – Voltcave
The 6 Best Case Fans in 2022 – Voltcave
The best PC fans in 2022 | PC Gamer
Top 7 Best 140mm Case Fans in 2022 (Buyer's Guide) - LeagueFeed
Discussion] 120mm/140mm case fan test feat. Noctua IndustrialPPC, Noiseblocker, Corsair, Cougar, Cooler Master, Aerocool, Phanteks, and Fractal Design (with sound!) : r/buildapc
Amazon.com: Pccooler 140mm Fan Moonlight Series, PC-M140 RGB LED PWM Fan with Duo-Side Halo - SilentPro 9 Fan Blade - Hydraulic Bearing - High Performance Cooling Computer Case Fan (Compatible PC-3M120 Series) :
Amazon.com: Antec 140mm RGB Case Fan, RGB PC Fans, Addressable RGB Fans, Prizm Series, 2 Pack with Controller Hub : Electronics
Best 140mm Case Fans: Quiet, High-Performance with Good Airflow