The hermetic fan-cooled condensing units (nf series) uses international brand danfoss ¡¡¨¦copeland and tecumseh compressor, danfoss refrigeration components , abb electricals . Optimization design system and with the condensing temperature controller make the units work always at the best conditions. The cover of the condensing units adopts high quality and antioxidant steel with zinc plating which is antiseptic and having longer service life.