Introducing the exceptional D series of air coolers, meticulously crafted as the ultimate indoor cooling solution designed to seamlessly integrate with condensing units for every conceivable type of cold room. This versatile series boasts three distinctive sub-series—DL, DD, and DJ—each tailored to meet specific temperature requirements. The DL air cooler, engineered for temperatures around 0ºC, is primarily utilized for fresh-keeping cold storage, offering unparalleled preservation. The DD series, optimal for maintaining environments at approximately -18ºC, is expertly suited for traditional cold storage needs. For extreme cooling demands, the DJ series excels, operating efficiently at temperatures ranging from -25ºC to -30ºC, making it the perfect choice for blast freezer rooms. Experience optimal cooling performance with Harbin Dongan Building Sheets Co., Ltd.'s state-of-the-art air coolers, transforming your cold storage solutions with innovative design and superior functionality.