AC Series Size AxB IP Rating Max Airflow Features MK280GAN (A)(HR) Dia.245x100mm / 9.6inch IP56 1300~450 CFM Reverse Airflow MK280GAN (HR) Dia.245x100mm / 9.6inch IP56 1300~450 CFM Metal Impeller MK254GAN (HR) Dia.219x87mm / 8.5inch IP56 1000~370 CFM Metal Impeller MK254GAN (3)(HR) Dia.219x87mm / 8.5inch IP56 1000~370 CFM Metal Impeller MK205RAN (A)(HR)(MS) Dia.189x74mm / 7.4 inch IP56 570~209 CFM Reverse Airflow, 3-Phase MK205RAN (A)(HR) Dia.189x64mm / 7.4 inch IP56 570~209 CFM Reverse Airflow MK205 (HR) Dia.197x79mm / 7.8inch IP56 630~220 CFM Metal Impeller MK200RAN (HR) Dia.172x79mm / 6.8inch IP56 485~160 CFM Metal Impeller MK200FAP (HR) Dia.172x71mm / 6.8inch IP56 485~160 CFM Metal Impeller MK180F (HR) Dia.160x80mm / 6.5inch IP56 410~210 CFM Metal Impeller