Noctua nf a14 uln 140mm premium quality fan the fully featured nf a14 uln is a 140mm fan that is ideal for use on watercooling radiators or as an upgrade for 140mm case fans the nf a14 is a premium quality quiet 140mm fan with a square frame that complies with noctuas aao advanced acoustic optimisation standard its square shape and 140mm mounting holes 1245mm spacing make it ideal for use on watercooling radiators or as an upgrade for 140mm case fans featuring sophisticated aerodyna