I swapped my two NZXT AER exhaust fans in my H500i with a Noctua NF-A12x15 120mm PWM (back) and a Noctua 140mm NF-A14 PWM (top). CPU is a few degrees cooler, but
Noctua NF-A14 PWM chromax.black.swap PC fan (W x H x D) 140 x 140 x 25 mm | Conrad.com
Buy Noctua NF-A14 PWM 140mm Fan [NF-A14-PWM] | PC Case Gear Australia
NOCTUA NF-A14 industrialPPC-3000 iPPC-3000 PWM 140mm 3000 RPM Heavy Duty PC Cooling Case / Radiator Fan – SweetLoot – Computer and Tech Lifestyle Store
Buy Now | Noctua NF-A14 PWM Chromax.Black.Swap Edition 140mm 1500RPM Cooling Fan | PLE Computers
Noctua NF-A14 PWM 140mm Case/Radiator Fan, Computers & Tech, Parts & Accessories, Computer Parts on Carousell
Noctua Industrial 140mm 3000RPM PWM Computer Case Fan