Cold Room Cold storage Evaporator introduction and Technical data Ceiling mounted typical air cooler(evaporator) which been widely used for different refrigerated room, cold room and cold storage.It is a indoor cooling equipment which need connect with outdoor freon condensing unit. 1) Ouyu1: 0ºC keeping-fresh room 2) Ouyu2: -18ºC refrigerating room 3) Ouyu3:-25ºC