Noctua nf a14 industrialppc 2000rpm pwm 140mm high performance fan conceived for industrial heavy duty applications that require enhanced cooling performance and advanced ingress protection the nf a14 industrialppc protected performance cooling is a ruggedised high speed version of the award winning retail model thanks to the outstanding aerodynamic efficiency of the nf a14 design and the use of a novel three phase motor the industrialppc version provides superior airflow and pressure cap