Efficient Unit Cooler produced by Chenguang includes BDF,LZW FD Series ceiling and floor type to Ammonia and Freon refrigeration system. BDF and LZW series with aluminum pipe and fins are chiefly designed for quick freezing, like deep tunnel freezer. And FD series with copper fins and aluminum pipe are in the purpose of cold storage and warehouse. The temperauture range form +5C- -30C.