The Maxkold YWF6E-400 is a 6-pole (low speed) single-phase external-rotor axial fan for refrigeration condensing units where reduced noise is required. 400mm blade diameter, 230V/1Ph/50Hz, 6-pole approximately 920rpm, sucker airflow direction. IP54 protection, Class F insulation. Lower rotational speed results in quieter operation versus the 4-pole equivalent.